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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Ashraf%2C+M+U&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Ashraf%2C+M+U&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Ashraf%2C+M+U&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.00778">arXiv:2207.00778</a> <span> [<a href="https://arxiv.org/pdf/2207.00778">pdf</a>, <a href="https://arxiv.org/format/2207.00778">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2022.137449">10.1016/j.physletb.2022.137449 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $\rm ^4_螞H$ and $\rm ^4_螞He$ binding energy in Au+Au collisions at $\sqrt{s_\mathrm{NN}}$ = 3 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atchison%2C+J">J. Atchison</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Brandenburg%2C+J+D">J. D. Brandenburg</a> , et al. (348 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.00778v3-abstract-short" style="display: inline;"> Measurements of mass and $螞$ binding energy of $\rm ^4_螞H$ and $\rm ^4_螞He$ in Au+Au collisions at $\sqrt{s_{_{\rm NN}}}=3$ GeV are presented, with an aim to address the charge symmetry breaking (CSB) problem in hypernuclei systems with atomic number A = 4. The $螞$ binding energies are measured to be $\rm 2.22\pm0.06(stat.) \pm0.14(syst.)$ MeV and $\rm 2.38\pm0.13(stat.) \pm0.12(syst.)$ MeV for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.00778v3-abstract-full').style.display = 'inline'; document.getElementById('2207.00778v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.00778v3-abstract-full" style="display: none;"> Measurements of mass and $螞$ binding energy of $\rm ^4_螞H$ and $\rm ^4_螞He$ in Au+Au collisions at $\sqrt{s_{_{\rm NN}}}=3$ GeV are presented, with an aim to address the charge symmetry breaking (CSB) problem in hypernuclei systems with atomic number A = 4. The $螞$ binding energies are measured to be $\rm 2.22\pm0.06(stat.) \pm0.14(syst.)$ MeV and $\rm 2.38\pm0.13(stat.) \pm0.12(syst.)$ MeV for $\rm ^4_螞H$ and $\rm ^4_螞He$, respectively. The measured $螞$ binding-energy difference is $\rm 0.16\pm0.14(stat.)\pm0.10(syst.)$ MeV for ground states. Combined with the $纬$-ray transition energies, the binding-energy difference for excited states is $\rm -0.16\pm0.14(stat.)\pm0.10(syst.)$ MeV, which is negative and comparable to the value of the ground states within uncertainties. These new measurements on the $螞$ binding-energy difference in A = 4 hypernuclei systems are consistent with the theoretical calculations that result in $\rm 螖B_螞^4(1_{exc}^{+})\approx -螖B_螞^4(0_{g.s.}^{+})<0$ and present a new method for the study of CSB effect using relativistic heavy-ion collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.00778v3-abstract-full').style.display = 'none'; document.getElementById('2207.00778v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> M. Abdallah et. al., STAR Collaboration, Physics Letters B 834 (2022) 137449 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2204.11661">arXiv:2204.11661</a> <span> [<a href="https://arxiv.org/pdf/2204.11661">pdf</a>, <a href="https://arxiv.org/ps/2204.11661">ps</a>, <a href="https://arxiv.org/format/2204.11661">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Two-particle correlations on transverse rapidity in Au+Au collisions at $\sqrt{s_{\rm NN}}=200$ GeV at STAR </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Aitbaev%2C+A">A. Aitbaev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (370 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2204.11661v1-abstract-short" style="display: inline;"> Two-particle correlation measurements projected onto two-dimensional, transverse rapidity coordinates ($y_{T1},y_{T2}$), allow access to dynamical properties of the QCD medium produced in relativistic heavy-ion collisions that angular correlation measurements are not sensitive to. We report non-identified charged-particle correlations for Au + Au minimum-bias collisions at $\sqrt{s_{\rm NN}}$ = 20… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.11661v1-abstract-full').style.display = 'inline'; document.getElementById('2204.11661v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2204.11661v1-abstract-full" style="display: none;"> Two-particle correlation measurements projected onto two-dimensional, transverse rapidity coordinates ($y_{T1},y_{T2}$), allow access to dynamical properties of the QCD medium produced in relativistic heavy-ion collisions that angular correlation measurements are not sensitive to. We report non-identified charged-particle correlations for Au + Au minimum-bias collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV taken by the STAR experiment at the Relativistic Heavy-Ion Collider (RHIC). Correlations are presented as 2D functions of transverse rapidity for like-sign, unlike-sign and all charged-particle pairs, as well as for particle pairs whose relative azimuthal angles lie on the near-side, the away-side, or at all relative azimuth. The correlations are constructed using charged particles with transverse momentum $p_T \geq 0.15$ GeV/$c$, pseudorapidity from $-$1 to 1, and azimuthal angles from $-蟺$ to $蟺$. The significant correlation structures that are observed evolve smoothly with collision centrality. The major correlation features include a saddle shape plus a broad peak with maximum near $y_T \approx 3$, corresponding to $p_T \approx$ 1.5 GeV/$c$. The broad peak is observed in both like- and unlike-sign charge combinations and in near- and away-side relative azimuthal angles. The all-charge, all-azimuth correlation measurements are compared with the theoretical predictions of {\sc hijing} and {\sc epos}. The results indicate that the correlations for peripheral to mid-central collisions can be approximately described as a superposition of nucleon + nucleon collisions with minimal effects from the QCD medium. Strong medium effects are indicated in mid- to most-central collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.11661v1-abstract-full').style.display = 'none'; document.getElementById('2204.11661v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2204.02302">arXiv:2204.02302</a> <span> [<a href="https://arxiv.org/pdf/2204.02302">pdf</a>, <a href="https://arxiv.org/format/2204.02302">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-022-05557-5">10.1038/s41586-022-05557-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pattern of Global Spin Alignment of $蠁$ and $K^{*0}$ mesons in Heavy-Ion Collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Aitbaev%2C+A">A. Aitbaev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (368 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2204.02302v3-abstract-short" style="display: inline;"> Notwithstanding decades of progress since Yukawa first developed a description of the force between nucleons in terms of meson exchange, a full understanding of the strong interaction remains a major challenge in modern science. One remaining difficulty arises from the non-perturbative nature of the strong force, which leads to the phenomenon of quark confinement at distances on the order of the s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.02302v3-abstract-full').style.display = 'inline'; document.getElementById('2204.02302v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2204.02302v3-abstract-full" style="display: none;"> Notwithstanding decades of progress since Yukawa first developed a description of the force between nucleons in terms of meson exchange, a full understanding of the strong interaction remains a major challenge in modern science. One remaining difficulty arises from the non-perturbative nature of the strong force, which leads to the phenomenon of quark confinement at distances on the order of the size of the proton. Here we show that in relativistic heavy-ion collisions, where quarks and gluons are set free over an extended volume, two species of produced vector (spin-1) mesons, namely $蠁$ and $K^{*0}$, emerge with a surprising pattern of global spin alignment. In particular, the global spin alignment for $蠁$ is unexpectedly large, while that for $K^{*0}$ is consistent with zero. The observed spin-alignment pattern and magnitude for the $蠁$ cannot be explained by conventional mechanisms, while a model with a connection to strong force fields, i.e. an effective proxy description within the Standard Model and Quantum Chromodynamics, accommodates the current data. This connection, if fully established, will open a potential new avenue for studying the behaviour of strong force fields. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.02302v3-abstract-full').style.display = 'none'; document.getElementById('2204.02302v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2204.01625">arXiv:2204.01625</a> <span> [<a href="https://arxiv.org/pdf/2204.01625">pdf</a>, <a href="https://arxiv.org/format/2204.01625">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/sciadv.abq3903">10.1126/sciadv.abq3903 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tomography of Ultra-relativistic Nuclei with Polarized Photon-gluon Collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Aitbaev%2C+A">A. Aitbaev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (370 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2204.01625v1-abstract-short" style="display: inline;"> A linearly polarized photon can be quantized from the Lorentz-boosted electromagnetic field of a nucleus traveling at ultra-relativistic speed. When two relativistic heavy nuclei pass one another at a distance of a few nuclear radii, the photon from one nucleus may interact through a virtual quark-antiquark pair with gluons from the other nucleus forming a short-lived vector meson (e.g. ${蟻^0}$).… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.01625v1-abstract-full').style.display = 'inline'; document.getElementById('2204.01625v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2204.01625v1-abstract-full" style="display: none;"> A linearly polarized photon can be quantized from the Lorentz-boosted electromagnetic field of a nucleus traveling at ultra-relativistic speed. When two relativistic heavy nuclei pass one another at a distance of a few nuclear radii, the photon from one nucleus may interact through a virtual quark-antiquark pair with gluons from the other nucleus forming a short-lived vector meson (e.g. ${蟻^0}$). In this experiment, the polarization was utilized in diffractive photoproduction to observe a unique spin interference pattern in the angular distribution of ${蟻^0\rightarrow蟺^+蟺^-}$ decays. The observed interference is a result of an overlap of two wave functions at a distance an order of magnitude larger than the ${蟻^0}$ travel distance within its lifetime. The strong-interaction nuclear radii were extracted from these diffractive interactions, and found to be $6.53\pm 0.06$ fm ($^{197} {\rm Au }$) and $7.29\pm 0.08$ fm ($^{238} {\rm U}$), larger than the nuclear charge radii. The observable is demonstrated to be sensitive to the nuclear geometry and quantum interference of non-identical particles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.01625v1-abstract-full').style.display = 'none'; document.getElementById('2204.01625v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> STAR Collaboration, Sci. Adv. 9, abq3903 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.07204">arXiv:2203.07204</a> <span> [<a href="https://arxiv.org/pdf/2203.07204">pdf</a>, <a href="https://arxiv.org/ps/2203.07204">ps</a>, <a href="https://arxiv.org/format/2203.07204">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Centrality and transverse momentum dependence of higher-order flow harmonics of identified hadrons in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Aitbaev%2C+A">A. Aitbaev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (373 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.07204v1-abstract-short" style="display: inline;"> We present high-precision measurements of elliptic, triangular, and quadrangular flow $v_{2}$, $v_{3}$, and $v_{4}$, respectively, at midrapidity ($|畏|<1.0$) for identified hadrons $蟺$, $p$, $K$, $\varphi$, $K_s$, $螞$ as a function of centrality and transverse momentum in Au+Au collisions at the center-of-mass energy $\sqrt{s_{\rm NN}}=$ 200 GeV. We observe similar $v_{n}$ trends between light and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.07204v1-abstract-full').style.display = 'inline'; document.getElementById('2203.07204v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.07204v1-abstract-full" style="display: none;"> We present high-precision measurements of elliptic, triangular, and quadrangular flow $v_{2}$, $v_{3}$, and $v_{4}$, respectively, at midrapidity ($|畏|<1.0$) for identified hadrons $蟺$, $p$, $K$, $\varphi$, $K_s$, $螞$ as a function of centrality and transverse momentum in Au+Au collisions at the center-of-mass energy $\sqrt{s_{\rm NN}}=$ 200 GeV. We observe similar $v_{n}$ trends between light and strange mesons which indicates that the heavier strange quarks flow as strongly as the lighter up and down quarks. The number-of-constituent-quark scaling for $v_{2}$, $v_{3}$, and $v_{4}$ is found to hold within statistical uncertainty for 0-10$\%$, 10-40$\%$ and 40-80$\%$ collision centrality intervals. The results are compared to several viscous hydrodynamic calculations with varying initial conditions, and could serve as an additional constraint to the development of hydrodynamic models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.07204v1-abstract-full').style.display = 'none'; document.getElementById('2203.07204v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 11 figures, submitted for publication</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.10365">arXiv:2201.10365</a> <span> [<a href="https://arxiv.org/pdf/2201.10365">pdf</a>, <a href="https://arxiv.org/ps/2201.10365">ps</a>, <a href="https://arxiv.org/format/2201.10365">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.129.252301">10.1103/PhysRevLett.129.252301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Collision-System and Beam-Energy Dependence of Anisotropic Flow Fluctuations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (370 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.10365v2-abstract-short" style="display: inline;"> Elliptic flow measurements from two-, four- and six-particle correlations are used to investigate flow fluctuations in collisions of U+U at $\sqrt{s_{\rm NN}}$= 193 GeV, Cu+Au at $\sqrt{s_{\rm NN}}$= 200 GeV and Au+Au spanning the range $\sqrt{s_{\rm NN}}$= 11.5 - 200 GeV. The measurements show a strong dependence of the flow fluctuations on collision centrality, a modest dependence on system size… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.10365v2-abstract-full').style.display = 'inline'; document.getElementById('2201.10365v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.10365v2-abstract-full" style="display: none;"> Elliptic flow measurements from two-, four- and six-particle correlations are used to investigate flow fluctuations in collisions of U+U at $\sqrt{s_{\rm NN}}$= 193 GeV, Cu+Au at $\sqrt{s_{\rm NN}}$= 200 GeV and Au+Au spanning the range $\sqrt{s_{\rm NN}}$= 11.5 - 200 GeV. The measurements show a strong dependence of the flow fluctuations on collision centrality, a modest dependence on system size, and very little if any, dependence on particle species and beam energy. The results, when compared to similar LHC measurements, viscous hydrodynamic calculations, and T$\mathrel{\protect\raisebox{-2.1pt}{R}}$ENTo model eccentricities, indicate that initial-state-driven fluctuations predominate the flow fluctuations generated in the collisions studied. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.10365v2-abstract-full').style.display = 'none'; document.getElementById('2201.10365v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.04066">arXiv:2112.04066</a> <span> [<a href="https://arxiv.org/pdf/2112.04066">pdf</a>, <a href="https://arxiv.org/format/2112.04066">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2022.136941">10.1016/j.physletb.2022.136941 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Light Nuclei Collectivity from $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au Collisions at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Aitbaev%2C+A">A. Aitbaev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (373 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2112.04066v2-abstract-short" style="display: inline;"> In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons. A breaking of this scaling and dominance of baryonic interactions is found for identified hadron collective flow measurements in $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au collisions. In this paper, we report measurements of the first- and secon… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.04066v2-abstract-full').style.display = 'inline'; document.getElementById('2112.04066v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.04066v2-abstract-full" style="display: none;"> In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons. A breaking of this scaling and dominance of baryonic interactions is found for identified hadron collective flow measurements in $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au collisions. In this paper, we report measurements of the first- and second-order azimuthal anisotropic parameters, $v_1$ and $v_2$, of light nuclei ($d$, $t$, $^{3}$He, $^{4}$He) produced in $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au collisions at the STAR experiment. An atomic mass number scaling is found in the measured $v_1$ slopes of light nuclei at mid-rapidity. For the measured $v_2$ magnitude, a strong rapidity dependence is observed. Unlike $v_2$ at higher collision energies, the $v_2$ values at mid-rapidity for all light nuclei are negative and no scaling is observed with the atomic mass number. Calculations by the Jet AA Microscopic Transport Model (JAM), with baryonic mean-field plus nucleon coalescence, are in good agreement with our observations, implying baryonic interactions dominate the collective dynamics in 3 GeV Au+Au collisions at RHIC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.04066v2-abstract-full').style.display = 'none'; document.getElementById('2112.04066v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.00240">arXiv:2112.00240</a> <span> [<a href="https://arxiv.org/pdf/2112.00240">pdf</a>, <a href="https://arxiv.org/format/2112.00240">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.202303">10.1103/PhysRevLett.128.202303 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of Proton High Order Cumulants in 3 GeV Au+Au Collisions and Implications for the QCD Critical Point </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (378 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2112.00240v3-abstract-short" style="display: inline;"> We report cumulants of the proton multiplicity distribution from dedicated fixed-target Au+Au collisions at 3.0 GeV, measured by the STAR experiment in the kinematic acceptance of rapidity ($y$) and transverse momentum ($p_{\rm T}$) within $-0.5 < y<0$ and $0.4 < p_{\rm T} <2.0 $ GeV/$c$. In the most central 0--5\% collisions, a proton cumulant ratio is measured to be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.00240v3-abstract-full').style.display = 'inline'; document.getElementById('2112.00240v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.00240v3-abstract-full" style="display: none;"> We report cumulants of the proton multiplicity distribution from dedicated fixed-target Au+Au collisions at 3.0 GeV, measured by the STAR experiment in the kinematic acceptance of rapidity ($y$) and transverse momentum ($p_{\rm T}$) within $-0.5 < y<0$ and $0.4 < p_{\rm T} <2.0 $ GeV/$c$. In the most central 0--5\% collisions, a proton cumulant ratio is measured to be $C_4/C_2=-0.85 \pm 0.09 ~(\rm stat.) \pm 0.82 ~(\rm syst.)$, which is less than unity, the Poisson baseline. The hadronic transport UrQMD model reproduces our $C_4/C_2$ in the measured acceptance. Compared to higher energy results and the transport model calculations, the suppression in $C_4/C_2$ is consistent with fluctuations driven by baryon number conservation and indicates an energy regime dominated by hadronic interactions. These data imply that the QCD critical region, if created in heavy-ion collisions, could only exist at energies higher than 3\,GeV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.00240v3-abstract-full').style.display = 'none'; document.getElementById('2112.00240v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review Letters 128, 202303 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.10396">arXiv:2111.10396</a> <span> [<a href="https://arxiv.org/pdf/2111.10396">pdf</a>, <a href="https://arxiv.org/format/2111.10396">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Theory">hep-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.129.092501">10.1103/PhysRevLett.129.092501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evidence for Nonlinear Gluon Effects in QCD and their $A$ Dependence at STAR </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Aitbaev%2C+A">A. Aitbaev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (372 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.10396v2-abstract-short" style="display: inline;"> The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-$蟺^0$s produced at forward pseudorapidities ($2.6<畏<4.0$) in $p$+$p$, $p+$Al, and $p+$Au collisions at a center-of-mass energy of 200 GeV. We observe a clear suppression of the correlated yields of back-to-back $蟺^0$ pairs in $p+$Al and $p+$Au collisions compared to the $p$+$p$ data. The observed suppression o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.10396v2-abstract-full').style.display = 'inline'; document.getElementById('2111.10396v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.10396v2-abstract-full" style="display: none;"> The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-$蟺^0$s produced at forward pseudorapidities ($2.6<畏<4.0$) in $p$+$p$, $p+$Al, and $p+$Au collisions at a center-of-mass energy of 200 GeV. We observe a clear suppression of the correlated yields of back-to-back $蟺^0$ pairs in $p+$Al and $p+$Au collisions compared to the $p$+$p$ data. The observed suppression of back-to-back pairs as a function of transverse momentum suggests nonlinear gluon dynamics arising at high parton densities. The larger suppression found in $p+$Au relative to $p+$Al collisions exhibits a dependence of the saturation scale, $Q_s^2$, on the mass number, $A$. A linear scaling of the suppression with $A^{1/3}$ is observed with a slope of $-0.09$ $\pm$ $0.01$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.10396v2-abstract-full').style.display = 'none'; document.getElementById('2111.10396v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages,3 figures, 1 supplemental material</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.11020">arXiv:2110.11020</a> <span> [<a href="https://arxiv.org/pdf/2110.11020">pdf</a>, <a href="https://arxiv.org/format/2110.11020">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $\sqrt{s}=510$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Aitbaev%2C+A">A. Aitbaev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (372 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.11020v2-abstract-short" style="display: inline;"> We report measurements of the longitudinal double-spin asymmetry, $A_{LL}$, for inclusive jet and dijet production in polarized proton-proton collisions at midrapidity and center-of-mass energy $\sqrt{s}$ = 510 GeV, using the high luminosity data sample collected by the STAR experiment in 2013. These measurements complement and improve the precision of previous STAR measurements at the same center… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.11020v2-abstract-full').style.display = 'inline'; document.getElementById('2110.11020v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.11020v2-abstract-full" style="display: none;"> We report measurements of the longitudinal double-spin asymmetry, $A_{LL}$, for inclusive jet and dijet production in polarized proton-proton collisions at midrapidity and center-of-mass energy $\sqrt{s}$ = 510 GeV, using the high luminosity data sample collected by the STAR experiment in 2013. These measurements complement and improve the precision of previous STAR measurements at the same center-of-mass energy that probe the polarized gluon distribution function at partonic momentum fraction 0.015 $\lesssim x \lesssim$ 0.25. The dijet asymmetries are separated into four jet-pair topologies, which provide further constraints on the $x$ dependence of the polarized gluon distribution function. These measurements are in agreement with previous STAR measurements and with predictions from current next-to-leading order global analyses. They provide more precise data at low dijet invariant mass that will better constraint the shape of the polarized gluon distribution function of the proton. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.11020v2-abstract-full').style.display = 'none'; document.getElementById('2110.11020v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.09666">arXiv:2110.09666</a> <span> [<a href="https://arxiv.org/pdf/2110.09666">pdf</a>, <a href="https://arxiv.org/format/2110.09666">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2021.136865">10.1016/j.physletb.2021.136865 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of cold nuclear matter effects for inclusive $J/蠄$ in $p$+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (373 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.09666v2-abstract-short" style="display: inline;"> Measurement by the STAR experiment at RHIC of the cold nuclear matter (CNM) effects experienced by inclusive $J/蠄$ at mid-rapidity in 0-100\% $p$+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200 GeV is presented. Such effects are quantified utilizing the nuclear modification factor, $R_{p\mathrm{Au}}$, obtained by taking a ratio of $J/蠄$ yield in $p$+Au collisions to that in $p$+$p$ collisions s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.09666v2-abstract-full').style.display = 'inline'; document.getElementById('2110.09666v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.09666v2-abstract-full" style="display: none;"> Measurement by the STAR experiment at RHIC of the cold nuclear matter (CNM) effects experienced by inclusive $J/蠄$ at mid-rapidity in 0-100\% $p$+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200 GeV is presented. Such effects are quantified utilizing the nuclear modification factor, $R_{p\mathrm{Au}}$, obtained by taking a ratio of $J/蠄$ yield in $p$+Au collisions to that in $p$+$p$ collisions scaled by the number of binary nucleon-nucleon collisions. The differential $J/蠄$ yield in both $p$+$p$ and $p$+Au collisions is measured through the dimuon decay channel, taking advantage of the trigger capability provided by the Muon Telescope Detector in the RHIC 2015 run. Consequently, the $J/蠄$ $R_{p\mathrm{Au}}$ is derived within the transverse momentum ($p_{\mathrm{T}}$) range of 0 to 10 GeV/$c$. A suppression of approximately 30% is observed for $p_{\mathrm{T}}<2$ GeV/$c$, while $J/蠄$ $R_{p\mathrm{Au}}$ becomes compatible with unity for $p_{\mathrm{T}}$ greater than 3 GeV/$c$, indicating the $J/蠄$ yield is minimally affected by the CNM effects at high $p_{\mathrm{T}}$. Comparison to a similar measurement from 0-20% central Au+Au collisions reveals that the observed strong $J/蠄$ suppression above 3 Gev/$c$ is mostly due to the hot medium effects, providing strong evidence for the formation of the quark-gluon plasma in these collisions. Several model calculations show qualitative agreement with the measured $J/蠄$ $R_{p\mathrm{Au}}$, while their agreement with the $J/蠄$ yields in $p$+$p$ and $p$+Au collisions is worse. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.09666v2-abstract-full').style.display = 'none'; document.getElementById('2110.09666v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 825 (2022) 136865 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.09513">arXiv:2110.09513</a> <span> [<a href="https://arxiv.org/pdf/2110.09513">pdf</a>, <a href="https://arxiv.org/format/2110.09513">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.202301">10.1103/PhysRevLett.128.202301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$ Lifetimes and Yields in Au+Au Collisions in the High Baryon Density Region </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (378 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.09513v3-abstract-short" style="display: inline;"> We report precision measurements of hypernuclei ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$ lifetimes obtained from Au+Au collisions at \snn = 3.0\,GeV and 7.2\,GeV collected by the STAR experiment at RHIC, and the first measurement of ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$ mid-rapidity yields in Au+Au collisions at \snn = 3.0\,GeV. ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$, being the two simplest bound states composed… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.09513v3-abstract-full').style.display = 'inline'; document.getElementById('2110.09513v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.09513v3-abstract-full" style="display: none;"> We report precision measurements of hypernuclei ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$ lifetimes obtained from Au+Au collisions at \snn = 3.0\,GeV and 7.2\,GeV collected by the STAR experiment at RHIC, and the first measurement of ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$ mid-rapidity yields in Au+Au collisions at \snn = 3.0\,GeV. ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$, being the two simplest bound states composed of hyperons and nucleons, are cornerstones in the field of hypernuclear physics. Their lifetimes are measured to be $221\pm15(\rm stat.)\pm19(\rm syst.)$\,ps for ${}^3_螞\rm{H}$ and $218\pm6(\rm stat.)\pm13(\rm syst.)$\,ps for ${}^4_螞\rm{H}$. The $p_T$-integrated yields of ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$ are presented in different centrality and rapidity intervals. It is observed that the shape of the rapidity distribution of ${}^4_螞\rm{H}$ is different for 0--10\% and 10--50\% centrality collisions. Thermal model calculations, using the canonical ensemble for strangeness, describes the ${}^3_螞\rm{H}$ yield well, while underestimating the ${}^4_螞\rm{H}$ yield. Transport models, combining baryonic mean-field and coalescence (JAM) or utilizing dynamical cluster formation via baryonic interactions (PHQMD) for light nuclei and hypernuclei production, approximately describe the measured ${}^3_螞\rm{H}$ and ${}^4_螞\rm{H}$ yields. Our measurements provide means to precisely assess our understanding of the fundamental baryonic interactions with strange quarks, which can impact our understanding of more complicated systems involving hyperons, such as the interior of neutron stars or exotic hypernuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.09513v3-abstract-full').style.display = 'none'; document.getElementById('2110.09513v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 captioned figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 128, 202301 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.13191">arXiv:2109.13191</a> <span> [<a href="https://arxiv.org/pdf/2109.13191">pdf</a>, <a href="https://arxiv.org/format/2109.13191">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.105.032007">10.1103/PhysRevD.105.032007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of inclusive electrons from open heavy-flavor hadron decays in $p$+$p$ collisions at $\sqrt{s} = 200$ GeV with the STAR detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=arwal%2C+M+M+A">M. M. Agg arwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (372 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.13191v2-abstract-short" style="display: inline;"> We report a new measurement of the production cross section for inclusive electrons from open heavy-flavor hadron decays as a function of transverse momentum ($p_{\rm T}$) at mid-rapidity ($|y|<$ 0.7) in $p$+$p$ collisions at $\sqrt{s} = 200$ GeV. The result is presented for 2.5 $<p_{\rm T}<$ 10 GeV/$c$ with an improved precision above 6 GeV/$c$ with respect to the previous measurements, providing… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.13191v2-abstract-full').style.display = 'inline'; document.getElementById('2109.13191v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.13191v2-abstract-full" style="display: none;"> We report a new measurement of the production cross section for inclusive electrons from open heavy-flavor hadron decays as a function of transverse momentum ($p_{\rm T}$) at mid-rapidity ($|y|<$ 0.7) in $p$+$p$ collisions at $\sqrt{s} = 200$ GeV. The result is presented for 2.5 $<p_{\rm T}<$ 10 GeV/$c$ with an improved precision above 6 GeV/$c$ with respect to the previous measurements, providing more constraints on perturbative QCD calculations. Moreover, this measurement also provides a high-precision reference for measurements of nuclear modification factors for inclusive electrons from open-charm and -bottom hadron decays in heavy-ion collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.13191v2-abstract-full').style.display = 'none'; document.getElementById('2109.13191v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 105, 032007 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.09793">arXiv:2109.09793</a> <span> [<a href="https://arxiv.org/pdf/2109.09793">pdf</a>, <a href="https://arxiv.org/format/2109.09793">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.105.044906">10.1103/PhysRevC.105.044906 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Differential measurements of jet substructure and partonic energy loss in Au$+$Au collisions at $\sqrt{s_{\rm{NN}}} =200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (372 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.09793v2-abstract-short" style="display: inline;"> The STAR collaboration presents jet substructure measurements related to both the momentum fraction and the opening angle within jets in \pp and \AuAu collisions at \sqrtsn $= 200$ GeV. The substructure observables include SoftDrop groomed momentum fraction (\zg), groomed jet radius (\rg), and subjet momentum fraction (\zsj) and opening angle (\tsj). The latter observable is introduced for the fir… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.09793v2-abstract-full').style.display = 'inline'; document.getElementById('2109.09793v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.09793v2-abstract-full" style="display: none;"> The STAR collaboration presents jet substructure measurements related to both the momentum fraction and the opening angle within jets in \pp and \AuAu collisions at \sqrtsn $= 200$ GeV. The substructure observables include SoftDrop groomed momentum fraction (\zg), groomed jet radius (\rg), and subjet momentum fraction (\zsj) and opening angle (\tsj). The latter observable is introduced for the first time. Fully corrected subjet measurements are presented for \pp collisions and are compared to leading order Monte Carlo models. The subjet \tsj~distributions reflect the jets leading opening angle and are utilized as a proxy for the resolution scale of the medium in \AuAu collisions. We compare data from \AuAu collisions to those from \pp which are embedded in minimum-bias \AuAu events in order to include the effects of detector smearing and the heavy-ion collision underlying event. The subjet observables are shown to be more robust to the background than \zg~and \rg. We observe no significant modifications of the subjet observables within the two highest-energy, back-to-back jets, resulting in a distribution of opening angles and the splittings that are vacuum-like. We also report measurements of the differential di-jet momentum imbalance ($A_{\rm{J}}$) for jets of varying \tsj. We find no qualitative differences in energy loss signatures for varying angular scales in the range $0.1 < $ \tsj $ < 0.3$, leading to the possible interpretation that energy loss in this population of high momentum di-jet pairs, is due to soft medium-induced gluon radiation from a single color-charge as it traverses the medium. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.09793v2-abstract-full').style.display = 'none'; document.getElementById('2109.09793v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 11 figures, 1 Appendix. Published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 105, 044906 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.07625">arXiv:2109.07625</a> <span> [<a href="https://arxiv.org/pdf/2109.07625">pdf</a>, <a href="https://arxiv.org/format/2109.07625">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.122303">10.1103/PhysRevLett.128.122303 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing the gluonic structure of the deuteron with $J/蠄$ photoproduction in d+Au ultra-peripheral collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (378 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.07625v2-abstract-short" style="display: inline;"> Understanding gluon density distributions and how they are modified in nuclei are among the most important goals in nuclear physics. In recent years, diffractive vector meson production measured in ultra-peripheral collisions (UPCs) at heavy-ion colliders has provided a new tool for probing the gluon density. In this Letter, we report the first measurement of $J/蠄$ photoproduction off the deuteron… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.07625v2-abstract-full').style.display = 'inline'; document.getElementById('2109.07625v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.07625v2-abstract-full" style="display: none;"> Understanding gluon density distributions and how they are modified in nuclei are among the most important goals in nuclear physics. In recent years, diffractive vector meson production measured in ultra-peripheral collisions (UPCs) at heavy-ion colliders has provided a new tool for probing the gluon density. In this Letter, we report the first measurement of $J/蠄$ photoproduction off the deuteron in UPCs at the center-of-mass energy $\sqrt{s_{_{\rm NN}}}=200~\rm GeV$ in d$+$Au collisions. The differential cross section as a function of momentum transfer $-t$ is measured. In addition, data with a neutron tagged in the deuteron-going Zero-Degree Calorimeter is investigated for the first time, which is found to be consistent with the expectation of incoherent diffractive scattering at low momentum transfer. Theoretical predictions based on the Color Glass Condensate saturation model and the gluon shadowing model are compared with the data quantitatively. A better agreement with the saturation model has been observed. With the current measurement, the results are found to be directly sensitive to the gluon density distribution of the deuteron and the deuteron breakup, which provides insights into the nuclear gluonic structure. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.07625v2-abstract-full').style.display = 'none'; document.getElementById('2109.07625v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Final published version Phys. Rev. Lett. 128, 122303</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.00131">arXiv:2109.00131</a> <span> [<a href="https://arxiv.org/pdf/2109.00131">pdf</a>, <a href="https://arxiv.org/format/2109.00131">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> </div> <p class="title is-5 mathjax"> Search for the Chiral Magnetic Effect with Isobar Collisions at $\sqrt{s_{NN}}$ = 200 GeV by the STAR Collaboration at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (373 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.00131v1-abstract-short" style="display: inline;"> The chiral magnetic effect (CME) is predicted to occur as a consequence of a local violation of $\cal P$ and $\cal CP$ symmetries of the strong interaction amidst a strong electro-magnetic field generated in relativistic heavy-ion collisions. Experimental manifestation of the CME involves a separation of positively and negatively charged hadrons along the direction of the magnetic field. Previous… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.00131v1-abstract-full').style.display = 'inline'; document.getElementById('2109.00131v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.00131v1-abstract-full" style="display: none;"> The chiral magnetic effect (CME) is predicted to occur as a consequence of a local violation of $\cal P$ and $\cal CP$ symmetries of the strong interaction amidst a strong electro-magnetic field generated in relativistic heavy-ion collisions. Experimental manifestation of the CME involves a separation of positively and negatively charged hadrons along the direction of the magnetic field. Previous measurements of the CME-sensitive charge-separation observables remain inconclusive because of large background contributions. In order to better control the influence of signal and backgrounds, the STAR Collaboration performed a blind analysis of a large data sample of approximately 3.8 billion isobar collisions of $^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr+$^{96}_{40}$Zr at $\sqrt{s_{\rm NN}}=200$ GeV. Prior to the blind analysis, the CME signatures are predefined as a significant excess of the CME-sensitive observables in Ru+Ru collisions over those in Zr+Zr collisions, owing to a larger magnetic field in the former. A precision down to 0.4% is achieved, as anticipated, in the relative magnitudes of the pertinent observables between the two isobar systems. Observed differences in the multiplicity and flow harmonics at the matching centrality indicate that the magnitude of the CME background is different between the two species. No CME signature that satisfies the predefined criteria has been observed in isobar collisions in this blind analysis. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.00131v1-abstract-full').style.display = 'none'; document.getElementById('2109.00131v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">43 pages, 27 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.00924">arXiv:2108.00924</a> <span> [<a href="https://arxiv.org/pdf/2108.00924">pdf</a>, <a href="https://arxiv.org/format/2108.00924">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2022.137152">10.1016/j.physletb.2022.137152 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing Strangeness Canonical Ensemble with $K^{-}$, $蠁(1020)$ and $螢^{-}$ Production in Au+Au Collisions at ${\sqrt{s_{\rm NN}} = \rm{3\,GeV}}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (374 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.00924v5-abstract-short" style="display: inline;"> We report the first multi-differential measurements of strange hadrons of $K^{-}$, $蠁$ and $螢^{-}$ yields as well as the ratios of $蠁/K^-$ and $蠁/螢^-$ in Au+Au collisions at ${\sqrt{s_{\rm NN}} = \rm{3\,GeV}}$ with the STAR experiment fixed target configuration at RHIC. The $蠁$ mesons and $螢^{-}$ hyperons are measured through hadronic decay channels, $蠁\rightarrow K^+K^-$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00924v5-abstract-full').style.display = 'inline'; document.getElementById('2108.00924v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.00924v5-abstract-full" style="display: none;"> We report the first multi-differential measurements of strange hadrons of $K^{-}$, $蠁$ and $螢^{-}$ yields as well as the ratios of $蠁/K^-$ and $蠁/螢^-$ in Au+Au collisions at ${\sqrt{s_{\rm NN}} = \rm{3\,GeV}}$ with the STAR experiment fixed target configuration at RHIC. The $蠁$ mesons and $螢^{-}$ hyperons are measured through hadronic decay channels, $蠁\rightarrow K^+K^-$ and $螢^-\rightarrow 螞蟺^-$. Collision centrality and rapidity dependence of the transverse momentum spectra for these strange hadrons are presented. The $4蟺$ yields and ratios are compared to thermal model and hadronic transport model predictions. At this collision energy, thermal model with grand canonical ensemble (GCE) under-predicts the $蠁/K^-$ and $蠁/螢^-$ ratios while the result of canonical ensemble (CE) calculations reproduce $蠁/K^-$, with the correlation length $r_c \sim 2.7$\,fm, and $蠁/螢^-$, $r_c \sim 4.2$\,fm, for the 0-10\% central collisions. Hadronic transport models including high mass resonance decays could also describe the ratios. While thermal calculations with GCE work well for strangeness production in high energy collisions, the change to CE at $\rm{3\,GeV}$ implies a rather different medium property at high baryon density. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00924v5-abstract-full').style.display = 'none'; document.getElementById('2108.00924v5-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 5 figures, 2 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Letters B 831 (2022) 137152 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.00908">arXiv:2108.00908</a> <span> [<a href="https://arxiv.org/pdf/2108.00908">pdf</a>, <a href="https://arxiv.org/format/2108.00908">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2022.137003">10.1016/j.physletb.2022.137003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Disappearance of partonic collectivity in $\sqrt{s_{NN}}$ = 3 GeV Au+Au collisions at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (373 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.00908v3-abstract-short" style="display: inline;"> We report on the measurements of directed flow $v_1$ and elliptic flow $v_2$ for hadrons ($蟺^{\pm}$, $K^{\pm}$, $K_{S}^0$, $p$, $蠁$, $螞$ and $螢^{-}$) from Au+Au collisions at $\sqrt{s_{NN}}$ = 3\,GeV and $v_{2}$ for ($蟺^{\pm}$, $K^{\pm}$, $p$ and $\overline{p}$) at 27 and 54.4\,GeV with the STAR experiment. While at the two higher energy midcentral collisions the number-of-constituent-quark (NCQ)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00908v3-abstract-full').style.display = 'inline'; document.getElementById('2108.00908v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.00908v3-abstract-full" style="display: none;"> We report on the measurements of directed flow $v_1$ and elliptic flow $v_2$ for hadrons ($蟺^{\pm}$, $K^{\pm}$, $K_{S}^0$, $p$, $蠁$, $螞$ and $螢^{-}$) from Au+Au collisions at $\sqrt{s_{NN}}$ = 3\,GeV and $v_{2}$ for ($蟺^{\pm}$, $K^{\pm}$, $p$ and $\overline{p}$) at 27 and 54.4\,GeV with the STAR experiment. While at the two higher energy midcentral collisions the number-of-constituent-quark (NCQ) scaling holds, at 3\,GeV the $v_{2}$ at midrapidity is negative for all hadrons and the NCQ scaling is absent. In addition, the $v_1$ slopes at midrapidity for almost all observed hadrons are found to be positive, implying dominant repulsive baryonic interactions. The features of negative $v_2$ and positive $v_1$ slope at 3\,GeV can be reproduced with a baryonic mean-field in transport model calculations. These results imply that the medium in such collisions is likely characterized by baryonic interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00908v3-abstract-full').style.display = 'none'; document.getElementById('2108.00908v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.00044">arXiv:2108.00044</a> <span> [<a href="https://arxiv.org/pdf/2108.00044">pdf</a>, <a href="https://arxiv.org/format/2108.00044">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.104.L061901">10.1103/PhysRevC.104.L061901 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Global $螞$-hyperon polarization in Au+Au collisions at $\sqrt{s_\mathrm{NN}}=3$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (372 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.00044v3-abstract-short" style="display: inline;"> Global hyperon polarization, $\overline{P}_\mathrm{H}$, in Au+Au collisions over a large range of collision energy, $\sqrt{s_\mathrm{NN}}$, was recently measured and successfully reproduced by hydrodynamic and transport models with intense fluid vorticity of the quark-gluon plasma. While na茂ve extrapolation of data trends suggests a large $\overline{P}_\mathrm{H}$ as the collision energy is reduce… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00044v3-abstract-full').style.display = 'inline'; document.getElementById('2108.00044v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.00044v3-abstract-full" style="display: none;"> Global hyperon polarization, $\overline{P}_\mathrm{H}$, in Au+Au collisions over a large range of collision energy, $\sqrt{s_\mathrm{NN}}$, was recently measured and successfully reproduced by hydrodynamic and transport models with intense fluid vorticity of the quark-gluon plasma. While na茂ve extrapolation of data trends suggests a large $\overline{P}_\mathrm{H}$ as the collision energy is reduced, the behavior of $\overline{P}_\mathrm{H}$ at small $\sqrt{s_\mathrm{NN}}<7.7$ GeV is unknown. Operating the STAR experiment in fixed-target mode, we measured the polarization of $螞$ hyperons along the direction of global angular momentum in Au+Au collisions at $\sqrt{s_\mathrm{NN}}=3$ GeV. The observation of substantial polarization of $4.91\pm0.81(\rm stat.)\pm0.15(\rm syst.)$% in these collisions may require a reexamination of the viscosity of any fluid created in the collision, of the thermalization timescale of rotational modes, and of hadronic mechanisms to produce global polarization. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00044v3-abstract-full').style.display = 'none'; document.getElementById('2108.00044v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 104 (2021) L061901 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.09243">arXiv:2106.09243</a> <span> [<a href="https://arxiv.org/pdf/2106.09243">pdf</a>, <a href="https://arxiv.org/format/2106.09243">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.092301">10.1103/PhysRevLett.128.092301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for the chiral magnetic effect via charge-dependent azimuthal correlations relative to spectator and participant planes in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (365 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2106.09243v2-abstract-short" style="display: inline;"> The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have differ… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.09243v2-abstract-full').style.display = 'inline'; document.getElementById('2106.09243v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.09243v2-abstract-full" style="display: none;"> The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have different sensitivities to the spectator and participant planes, and could thus be determined by measurements with respect to these planes. We report such measurements in Au+Au collisions at a nucleon-nucleon center-of-mass energy of 200 GeV at the Relativistic Heavy-Ion Collider. It is found that the charge separation, with the flow background removed, is consistent with zero in peripheral (large impact parameter) collisions. Some indication of finite CME signals is seen in mid-central (intermediate impact parameter) collisions. Significant residual background effects may, however, still be present. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.09243v2-abstract-full').style.display = 'none'; document.getElementById('2106.09243v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">PRL published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 128, 092301 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.14698">arXiv:2105.14698</a> <span> [<a href="https://arxiv.org/pdf/2105.14698">pdf</a>, <a href="https://arxiv.org/format/2105.14698">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> </div> <p class="title is-5 mathjax"> Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity Distributions in Au+Au Collisions at $\sqrt{s_{\rm NN}}=$ 27, 54.4, and 200 GeV at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (369 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.14698v2-abstract-short" style="display: inline;"> According to first principle Lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region $渭_{\rm B}\leq T_{c}$. In this range the ratio, $C_{6}/C_{2}$, of net-baryon distributions are predicted to be negative. In this paper, we report the first measurement of the midrapidity net-proton $C_{6}/C_{2}$ from 27, 54.4 and 200 GeV Au+Au collisi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.14698v2-abstract-full').style.display = 'inline'; document.getElementById('2105.14698v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.14698v2-abstract-full" style="display: none;"> According to first principle Lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region $渭_{\rm B}\leq T_{c}$. In this range the ratio, $C_{6}/C_{2}$, of net-baryon distributions are predicted to be negative. In this paper, we report the first measurement of the midrapidity net-proton $C_{6}/C_{2}$ from 27, 54.4 and 200 GeV Au+Au collisions at RHIC. The dependence on collision centrality and kinematic acceptance in ($p_{T}$, $y$) are analyzed. While for 27 and 54.4 GeV collisions the $C_{6}/C_{2}$ values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the $C_{6}/C_{2}$ ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high energy nuclear collisions at top RHIC energy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.14698v2-abstract-full').style.display = 'none'; document.getElementById('2105.14698v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 7 figures, 2 tables (published version)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.13286">arXiv:2103.13286</a> <span> [<a href="https://arxiv.org/pdf/2103.13286">pdf</a>, <a href="https://arxiv.org/format/2103.13286">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.104.052007">10.1103/PhysRevD.104.052007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Invariant Jet Mass Measurements in $pp$ Collisions at $\sqrt{s} = 200$ GeV at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (365 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.13286v2-abstract-short" style="display: inline;"> We present the first inclusive measurements of the invariant and SoftDrop jet mass in proton-proton collisions at $\sqrt{s}=200$ GeV at STAR. The measurements are fully corrected for detector effects, and reported differentially in both the jet transverse momentum and jet radius parameter. We compare the measurements to established leading-order Monte Carlo event generators and find that STAR-tune… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.13286v2-abstract-full').style.display = 'inline'; document.getElementById('2103.13286v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.13286v2-abstract-full" style="display: none;"> We present the first inclusive measurements of the invariant and SoftDrop jet mass in proton-proton collisions at $\sqrt{s}=200$ GeV at STAR. The measurements are fully corrected for detector effects, and reported differentially in both the jet transverse momentum and jet radius parameter. We compare the measurements to established leading-order Monte Carlo event generators and find that STAR-tuned PYTHIA-6 reproduces the data, while LHC tunes of PYTHIA-8 and HERWIG-7 do not agree with the data, providing further constraints on parameter tuning. Finally, we observe that SoftDrop grooming, for which the contribution of wide-angle non-perturbative radiation is suppressed, shifts the jet mass distributions into closer agreement with the partonic jet mass as determined by both PYTHIA-8 and a next-to-leading-logarithmic accuracy perturbative QCD calculation. These measurements complement recent LHC measurements in a different kinematic region, as well as establish a baseline for future jet mass measurements in heavy-ion collisions at RHIC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.13286v2-abstract-full').style.display = 'none'; document.getElementById('2103.13286v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 104, 052007 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.09451">arXiv:2103.09451</a> <span> [<a href="https://arxiv.org/pdf/2103.09451">pdf</a>, <a href="https://arxiv.org/format/2103.09451">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.103.064907">10.1103/PhysRevC.103.064907 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Azimuthal anisotropy measurements of strange and multistrange hadrons in U+U collisions at $\sqrt{s_{NN}} = 193$ GeV at the BNL Relativistic Heavy Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (370 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.09451v2-abstract-short" style="display: inline;"> We present systematic measurements of azimuthal anisotropy for strange and multistrange hadrons ($K^{0}_{s}$, $螞$, $螢$, and $惟$) and $蠁$ mesons at midrapidity ($|y| <$ 1.0) in collisions of U + U nuclei at $\sqrt{s_{NN}} = 193$ GeV, recorded by the STAR detector at the Relativistic Heavy Ion Collider. Transverse momentum ($p_{\text{T}}$) dependence of flow coefficients ($v_{2}$, $v_{3}$, and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.09451v2-abstract-full').style.display = 'inline'; document.getElementById('2103.09451v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.09451v2-abstract-full" style="display: none;"> We present systematic measurements of azimuthal anisotropy for strange and multistrange hadrons ($K^{0}_{s}$, $螞$, $螢$, and $惟$) and $蠁$ mesons at midrapidity ($|y| <$ 1.0) in collisions of U + U nuclei at $\sqrt{s_{NN}} = 193$ GeV, recorded by the STAR detector at the Relativistic Heavy Ion Collider. Transverse momentum ($p_{\text{T}}$) dependence of flow coefficients ($v_{2}$, $v_{3}$, and $v_{4}$) is presented for minimum bias collisions and three different centrality intervals. Number of constituent quark scaling of the measured flow coefficients in U + U collisions is discussed. We also present the ratio of $v_{n}$ scaled by the participant eccentricity ($\varepsilon_{n}\left\lbrace 2 \right\rbrace$) to explore system size dependence and collectivity in U + U collisions. The magnitude of $v_{2}/\varepsilon_{2}$ is found to be smaller in U + U collisions than that in central Au + Au collisions contradicting naive eccentricity scaling. Furthermore, the ratios between various flow harmonics ($v_{3}/v_{2}^{3/2}$, $v_{4}/v_{2}^{4/2}$) are studied and compared with hydrodynamic and transport model calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.09451v2-abstract-full').style.display = 'none'; document.getElementById('2103.09451v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 16 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 103, 064907 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.05571">arXiv:2103.05571</a> <span> [<a href="https://arxiv.org/pdf/2103.05571">pdf</a>, <a href="https://arxiv.org/format/2103.05571">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.103.L091103">10.1103/PhysRevD.103.L091103 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $\sqrt{s}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (366 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.05571v2-abstract-short" style="display: inline;"> We report high-precision measurements of the longitudinal double-spin asymmetry, $A_{LL}$, for midrapidity inclusive jet and dijet production in polarized $pp$ collisions at a center-of-mass energy of $\sqrt{s}=200\,\mathrm{GeV}$. The new inclusive jet data are sensitive to the gluon helicity distribution, $螖g(x,Q^2)$, for gluon momentum fractions in the range from $x \simeq 0.05$ to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.05571v2-abstract-full').style.display = 'inline'; document.getElementById('2103.05571v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.05571v2-abstract-full" style="display: none;"> We report high-precision measurements of the longitudinal double-spin asymmetry, $A_{LL}$, for midrapidity inclusive jet and dijet production in polarized $pp$ collisions at a center-of-mass energy of $\sqrt{s}=200\,\mathrm{GeV}$. The new inclusive jet data are sensitive to the gluon helicity distribution, $螖g(x,Q^2)$, for gluon momentum fractions in the range from $x \simeq 0.05$ to $x \simeq 0.5$, while the new dijet data provide further constraints on the $x$ dependence of $螖g(x,Q^2)$. The results are in good agreement with previous measurements at $\sqrt{s}=200\,\mathrm{GeV}$ and with recent theoretical evaluations of prior world data. Our new results have better precision and thus strengthen the evidence that $螖g(x,Q^2)$ is positive for $x > 0.05$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.05571v2-abstract-full').style.display = 'none'; document.getElementById('2103.05571v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 091103 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.12413">arXiv:2101.12413</a> <span> [<a href="https://arxiv.org/pdf/2101.12413">pdf</a>, <a href="https://arxiv.org/format/2101.12413">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.104.024902">10.1103/PhysRevC.104.024902 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Cumulants and Correlation Functions of Net-proton, Proton and Antiproton Multiplicity Distributions in Au+Au Collisions at energies available at the BNL Relativistic Heavy Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhagat%2C+P">P. Bhagat</a> , et al. (367 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2101.12413v2-abstract-short" style="display: inline;"> We report a systematic measurement of cumulants, $C_{n}$, for net-proton, proton and antiproton multiplicity distributions, and correlation functions, $魏_n$, for proton and antiproton multiplicity distributions up to the fourth order in Au+Au collisions at $\sqrt{s_{\mathrm {NN}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 62.4 and 200 GeV. The $C_{n}$ and $魏_n$ are presented as a function of collisi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.12413v2-abstract-full').style.display = 'inline'; document.getElementById('2101.12413v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.12413v2-abstract-full" style="display: none;"> We report a systematic measurement of cumulants, $C_{n}$, for net-proton, proton and antiproton multiplicity distributions, and correlation functions, $魏_n$, for proton and antiproton multiplicity distributions up to the fourth order in Au+Au collisions at $\sqrt{s_{\mathrm {NN}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 62.4 and 200 GeV. The $C_{n}$ and $魏_n$ are presented as a function of collision energy, centrality and kinematic acceptance in rapidity, $y$, and transverse momentum, $p_{T}$. The data were taken during the first phase of the Beam Energy Scan (BES) program (2010 -- 2017) at the BNL Relativistic Heavy Ion Collider (RHIC) facility. The measurements are carried out at midrapidity ($|y| <$ 0.5) and transverse momentum 0.4 $<$ $p_{\rm T}$ $<$ 2.0 GeV/$c$, using the STAR detector at RHIC. We observe a non-monotonic energy dependence ($\sqrt{s_{\mathrm {NN}}}$ = 7.7 -- 62.4 GeV) of the net-proton $C_{4}$/$C_{2}$ with the significance of 3.1$蟽$ for the 0-5\% central Au+Au collisions. This is consistent with the expectations of critical fluctuations in a QCD-inspired model. Thermal and transport model calculations show a monotonic variation with $\sqrt{s_{\mathrm {NN}}}$. For the multiparticle correlation functions, we observe significant negative values for a two-particle correlation function, $魏_2$, of protons and antiprotons, which are mainly due to the effects of baryon number conservation. Furthermore, it is found that the four-particle correlation function, $魏_4$, of protons plays a role in determining the energy dependence of proton $C_4/C_1$ below 19.6 GeV, which cannot be understood by the effect of baryon number conservation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.12413v2-abstract-full').style.display = 'none'; document.getElementById('2101.12413v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">34 pages, 25 figures, 8 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 104, 024902 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.13601">arXiv:2012.13601</a> <span> [<a href="https://arxiv.org/pdf/2012.13601">pdf</a>, <a href="https://arxiv.org/format/2012.13601">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.126.162301">10.1103/PhysRevLett.126.162301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Global polarization of $螢$ and $惟$ hyperons in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (346 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2012.13601v2-abstract-short" style="display: inline;"> Global polarization of $螢$ and $惟$ hyperons has been measured for the first time in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV. The measurements of the $螢^-$ and $\bar螢^+$ hyperon polarization have been performed by two independent methods, via analysis of the angular distribution of the daughter particles in the parity violating weak decay $螢\rightarrow螞+蟺$, as well as by measuring the pola… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.13601v2-abstract-full').style.display = 'inline'; document.getElementById('2012.13601v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.13601v2-abstract-full" style="display: none;"> Global polarization of $螢$ and $惟$ hyperons has been measured for the first time in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV. The measurements of the $螢^-$ and $\bar螢^+$ hyperon polarization have been performed by two independent methods, via analysis of the angular distribution of the daughter particles in the parity violating weak decay $螢\rightarrow螞+蟺$, as well as by measuring the polarization of the daughter $螞$-hyperon, polarized via polarization transfer from its parent. The polarization, obtained by combining the results from the two methods and averaged over $螢^-$ and $\bar螢^+$, is measured to be $\langle P_螢\rangle = 0.47\pm0.10~({\rm stat.})\pm0.23~({\rm syst.})\,\%$ for the collision centrality 20\%-80\%. The $\langle P_螢\rangle$ is found to be slightly larger than the inclusive $螞$ polarization and in reasonable agreement with a multi-phase transport model (AMPT). The $\langle P_螢\rangle$ is found to follow the centrality dependence of the vorticity predicted in the model, increasing toward more peripheral collisions. The global polarization of $惟$, $\langle P_惟\rangle = 1.11\pm0.87~({\rm stat.})\pm1.97~({\rm syst.})\,\%$ was obtained by measuring the polarization of daughter $螞$ in the decay $惟\rightarrow 螞+ K$, assuming the polarization transfer factor $C_{惟螞}=1$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.13601v2-abstract-full').style.display = 'none'; document.getElementById('2012.13601v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 3 figures, Accepted for publication in Physical Review Letters</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 126, 162301 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.07146">arXiv:2012.07146</a> <span> [<a href="https://arxiv.org/pdf/2012.07146">pdf</a>, <a href="https://arxiv.org/format/2012.07146">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.103.072005">10.1103/PhysRevD.103.072005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Comparison of transverse single-spin asymmetries for forward $蟺^{0}$ production in polarized $pp$, $p\rm{Al}$ and $p\rm{Au}$ collisions at nucleon pair c.m. energy $\sqrt{s_{\mathrm{NN}}}= 200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (347 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2012.07146v3-abstract-short" style="display: inline;"> The STAR Collaboration reports a measurement of the transverse single-spin asymmetries, $A_{N}$, for neutral pions produced in polarized proton collisions with protons ($pp$), with aluminum nuclei ($p\rm{Al}$) and with gold nuclei ($p\rm{Au}$) at a nucleon-nucleon center-of-mass energy of 200 GeV. Neutral pions are observed in the forward direction relative to the transversely polarized proton bea… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.07146v3-abstract-full').style.display = 'inline'; document.getElementById('2012.07146v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.07146v3-abstract-full" style="display: none;"> The STAR Collaboration reports a measurement of the transverse single-spin asymmetries, $A_{N}$, for neutral pions produced in polarized proton collisions with protons ($pp$), with aluminum nuclei ($p\rm{Al}$) and with gold nuclei ($p\rm{Au}$) at a nucleon-nucleon center-of-mass energy of 200 GeV. Neutral pions are observed in the forward direction relative to the transversely polarized proton beam, in the pseudo-rapidity region $2.7<畏<3.8$. Results are presented for $蟺^0$s observed in the STAR FMS electromagnetic calorimeter in narrow Feynman x ($x_F$) and transverse momentum ($p_T$) bins, spanning the range $0.17<x_F<0.81$ and $1.7<p_{T}<6.0$ GeV/$c$. For fixed $x_F<0.47$, the asymmetries are found to rise with increasing transverse momentum. For larger $x_F$, the asymmetry flattens or falls as ${p_T}$ increases. Parametrizing the ratio $r(A) \equiv A_N(pA)/A_N(pp)=A^P$ over the kinematic range, the ratio $r(A)$ is found to depend only weakly on $A$, with ${\langle}P{\rangle} = -0.027 \pm 0.005$. No significant difference in $P$ is observed between the low-$p_T$ region, $p_T<2.5$ GeV/$c$, where gluon saturation effects may play a role, and the high-$p_T$ region, $p_T>2.5$ GeV/$c$. It is further observed that the value of $A_N$ is significantly larger for events with a large-$p_T$ isolated $蟺^0$ than for events with a non-isolated $蟺^0$ accompanied by additional jet-like fragments. The nuclear dependence $r(A)$ is similar for isolated and non-isolated $蟺^0$ events. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.07146v3-abstract-full').style.display = 'none'; document.getElementById('2012.07146v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 072005 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.04708">arXiv:2011.04708</a> <span> [<a href="https://arxiv.org/pdf/2011.04708">pdf</a>, <a href="https://arxiv.org/ps/2011.04708">ps</a>, <a href="https://arxiv.org/format/2011.04708">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.103.012001">10.1103/PhysRevD.103.012001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of $W$ and $Z/纬^*$ cross sections and their ratios in $p+p$ collisions at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (345 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.04708v2-abstract-short" style="display: inline;"> We report on the $W$ and $Z/纬^*$ differential and total cross sections as well as the $W^+$/$W^-$ and $(W^+ + W^-)$/$(Z/纬^*)$ cross-section ratios measured by the STAR experiment at RHIC in $p+p$ collisions at $\sqrt{s} = 500$ GeV and $510$ GeV. The cross sections and their ratios are sensitive to quark and antiquark parton distribution functions. In particular, at leading order, the $W$ cross-sec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.04708v2-abstract-full').style.display = 'inline'; document.getElementById('2011.04708v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.04708v2-abstract-full" style="display: none;"> We report on the $W$ and $Z/纬^*$ differential and total cross sections as well as the $W^+$/$W^-$ and $(W^+ + W^-)$/$(Z/纬^*)$ cross-section ratios measured by the STAR experiment at RHIC in $p+p$ collisions at $\sqrt{s} = 500$ GeV and $510$ GeV. The cross sections and their ratios are sensitive to quark and antiquark parton distribution functions. In particular, at leading order, the $W$ cross-section ratio is sensitive to the $\bar{d}/\bar{u}$ ratio. These measurements were taken at high $Q^2 \sim M_W^2,M_Z^2$ and can serve as input into global analyses to provide constraints on the sea quark distributions. The results presented here combine three STAR data sets from 2011, 2012, and 2013, accumulating an integrated luminosity of 350 pb$^{-1}$. We also assess the expected impact that our $W^+/W^-$ cross-section ratios will have on various quark distributions, and find sensitivity to the $\bar{u}-\bar{d}$ and $\bar{d}/\bar{u}$ distributions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.04708v2-abstract-full').style.display = 'none'; document.getElementById('2011.04708v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted to PRD 39 pages, 15 Figs., and 9 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 012001 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.14005">arXiv:2007.14005</a> <span> [<a href="https://arxiv.org/pdf/2007.14005">pdf</a>, <a href="https://arxiv.org/format/2007.14005">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.103.034908">10.1103/PhysRevC.103.034908 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Flow and interferometry results from Au+Au collisions at $\sqrt{\textit{s}_{NN}}$ = 4.5 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (343 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2007.14005v4-abstract-short" style="display: inline;"> The Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC) was extended to energies below $\sqrt{\textit{s}_{NN}}$ = 7.7 GeV in 2015 by successful implementation of the fixed-target mode of operation in the STAR (Solenoidal Track At RHIC) experiment. In the fixed-target mode, ions circulate in one ring of the collider and interact with a stationary target at the entrance of t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.14005v4-abstract-full').style.display = 'inline'; document.getElementById('2007.14005v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.14005v4-abstract-full" style="display: none;"> The Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC) was extended to energies below $\sqrt{\textit{s}_{NN}}$ = 7.7 GeV in 2015 by successful implementation of the fixed-target mode of operation in the STAR (Solenoidal Track At RHIC) experiment. In the fixed-target mode, ions circulate in one ring of the collider and interact with a stationary target at the entrance of the STAR Time Projection Chamber. The first results for Au+Au collisions at $\sqrt{\textit{s}_{NN}}$ = 4.5 GeV are presented, including directed and elliptic flow of identified hadrons, and radii from pion femtoscopy. The proton flow and pion femtoscopy results agree quantitatively with earlier measurements by Alternating Gradient Synchrotron experiments at similar energies. This validates running the STAR experiment in the fixed-target configuration. Pion directed and elliptic flow are presented for the first time at this beam energy. Pion and proton elliptic flow show behavior which hints at constituent quark scaling, but large error bars preclude reliable conclusions. The ongoing second phase of BES (BES-II) will provide fixed-target data sets with 100 times more events at each of several energies down to $\sqrt{\textit{s}_{NN}}$ = 3.0 GeV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.14005v4-abstract-full').style.display = 'none'; document.getElementById('2007.14005v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 20 figures; Contexts and figure caption was modified, one reference was added to address the referee's comments</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 103, 034908 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.04732">arXiv:2007.04732</a> <span> [<a href="https://arxiv.org/pdf/2007.04732">pdf</a>, <a href="https://arxiv.org/format/2007.04732">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.102.092009">10.1103/PhysRevD.102.092009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of inclusive J/$蠄$ polarization in p+p collisions at $\sqrt{s}$ = 200 GeV by the STAR experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (340 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2007.04732v2-abstract-short" style="display: inline;"> We report on new measurements of inclusive J/$蠄$ polarization at mid-rapidity in p+p collisions at $\sqrt{s}$ = 200 GeV by the STAR experiment at RHIC. The polarization parameters, $位_胃$, $位_蠁$, and $位_{胃蠁}$, are measured as a function of transverse momentum ($p_T$) in both the Helicity and Collins-Soper (CS) reference frames within $p_T< 10$ GeV/$C$. Except for $位_胃$ in the CS frame at the highes… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.04732v2-abstract-full').style.display = 'inline'; document.getElementById('2007.04732v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.04732v2-abstract-full" style="display: none;"> We report on new measurements of inclusive J/$蠄$ polarization at mid-rapidity in p+p collisions at $\sqrt{s}$ = 200 GeV by the STAR experiment at RHIC. The polarization parameters, $位_胃$, $位_蠁$, and $位_{胃蠁}$, are measured as a function of transverse momentum ($p_T$) in both the Helicity and Collins-Soper (CS) reference frames within $p_T< 10$ GeV/$C$. Except for $位_胃$ in the CS frame at the highest measured $p_T$, all three polarization parameters are consistent with 0 in both reference frames without any strong $p_T$ dependence. Several model calculations are compared with data, and the one using the Color Glass Condensate effective field theory coupled with non-relativistic QCD gives the best overall description of the experimental results, even though other models cannot be ruled out due to experimental uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.04732v2-abstract-full').style.display = 'none'; document.getElementById('2007.04732v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 11 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 102, 092009 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.04609">arXiv:2007.04609</a> <span> [<a href="https://arxiv.org/pdf/2007.04609">pdf</a>, <a href="https://arxiv.org/format/2007.04609">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.044906">10.1103/PhysRevC.102.044906 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beam-Energy Dependence of the Directed Flow of Deuterons in Au+Au Collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (339 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2007.04609v2-abstract-short" style="display: inline;"> We present a measurement of the first-order azimuthal anisotropy, $v_1(y)$, of deuterons from Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 14.5, 19.6, 27, and 39 GeV recorded with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The energy dependence of the $v_1(y)$ slope, $dv_{1}/dy|_{y=0}$, for deuterons, where $y$ is the rapidity, is extracted for semi-central collisions (… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.04609v2-abstract-full').style.display = 'inline'; document.getElementById('2007.04609v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.04609v2-abstract-full" style="display: none;"> We present a measurement of the first-order azimuthal anisotropy, $v_1(y)$, of deuterons from Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 14.5, 19.6, 27, and 39 GeV recorded with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The energy dependence of the $v_1(y)$ slope, $dv_{1}/dy|_{y=0}$, for deuterons, where $y$ is the rapidity, is extracted for semi-central collisions (10-40\% centrality) and compared to that of protons. While the $v_1(y)$ slopes of protons are generally negative for $\sqrt{s_{NN}} >$ 10 GeV, those for deuterons are consistent with zero, a strong enhancement of the $v_1(y)$ slope of deuterons is seen at the lowest collision energy (the largest baryon density) at $\sqrt{s_{NN}} =$ 7.7 GeV. In addition, we report the transverse momentum dependence of $v_1$ for protons and deuterons. The experimental results are compared with transport and coalescence models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.04609v2-abstract-full').style.display = 'none'; document.getElementById('2007.04609v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 044906 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.13537">arXiv:2006.13537</a> <span> [<a href="https://arxiv.org/pdf/2006.13537">pdf</a>, <a href="https://arxiv.org/ps/2006.13537">ps</a>, <a href="https://arxiv.org/format/2006.13537">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2020.135728">10.1016/j.physletb.2020.135728 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Investigation of the linear and mode-coupled flow harmonics in Au+Au collisions at $\sqrt{\textit{s}_{NN}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (340 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.13537v2-abstract-short" style="display: inline;"> Flow harmonics ($\textit{v}_{n}$) of the Fourier expansion for the azimuthal distributions of hadrons are commonly employed to quantify the azimuthal anisotropy of particle production relative to the collision symmetry planes. While lower order Fourier coefficients ($\textit{v}_{2}$ and $\textit{v}_{3}$) are more directly related to the corresponding eccentricities of the initial state, the higher… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.13537v2-abstract-full').style.display = 'inline'; document.getElementById('2006.13537v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.13537v2-abstract-full" style="display: none;"> Flow harmonics ($\textit{v}_{n}$) of the Fourier expansion for the azimuthal distributions of hadrons are commonly employed to quantify the azimuthal anisotropy of particle production relative to the collision symmetry planes. While lower order Fourier coefficients ($\textit{v}_{2}$ and $\textit{v}_{3}$) are more directly related to the corresponding eccentricities of the initial state, the higher-order flow harmonics ($\textit{v}_{n>3}$) can be induced by a mode-coupled response to the lower-order anisotropies, in addition to a linear response to the same-order anisotropies. These higher-order flow harmonics and their linear and mode-coupled contributions can be used to more precisely constrain the initial conditions and the transport properties of the medium in theoretical models. The multiparticle azimuthal cumulant method is used to measure the linear and mode-coupled contributions in the higher-order anisotropic flow, the mode-coupled response coefficients, and the correlations of the event plane angles for charged particles as functions of centrality and transverse momentum in Au+Au collisions at nucleon-nucleon center-of-mass energy $\sqrt{\textit{s}_{NN}}$ = 200 GeV. The results are compared to similar LHC measurements as well as to several viscous hydrodynamic calculations with varying initial conditions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.13537v2-abstract-full').style.display = 'none'; document.getElementById('2006.13537v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 4 figures, submitted for publication</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.05035">arXiv:2006.05035</a> <span> [<a href="https://arxiv.org/pdf/2006.05035">pdf</a>, <a href="https://arxiv.org/format/2006.05035">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.106.034908">10.1103/PhysRevC.106.034908 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pair invariant mass to isolate background in the search for the chiral magnetic effect in Au+Au collisions at $\sqrt{s_{_{\rm NN}}}$= 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (340 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.05035v2-abstract-short" style="display: inline;"> Quark interactions with topological gluon configurations can induce local chirality imbalance and parity violation in quantum chromodynamics, which can lead to the chiral magnetic effect (CME) -- an electric charge separation along the strong magnetic field in relativistic heavy-ion collisions. The CME-sensitive azimuthal correlator observable ($螖纬$) is contaminated by background arising, in part,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.05035v2-abstract-full').style.display = 'inline'; document.getElementById('2006.05035v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.05035v2-abstract-full" style="display: none;"> Quark interactions with topological gluon configurations can induce local chirality imbalance and parity violation in quantum chromodynamics, which can lead to the chiral magnetic effect (CME) -- an electric charge separation along the strong magnetic field in relativistic heavy-ion collisions. The CME-sensitive azimuthal correlator observable ($螖纬$) is contaminated by background arising, in part, from resonance decays coupled with elliptic anisotropy ($v_{2}$). We report here differential measurements of the correlator as a function of the pair invariant mass ($m_{\rm inv}$) in 20-50\% centrality Au+Au collisions at $\sqrt{s_{_{\rm NN}}}$= 200 GeV by the STAR experiment at RHIC. Strong resonance background contributions to $螖纬$ are observed. At large $m_{\rm inv}$ where this background is significantly reduced, the $螖纬$ value is found to be significantly smaller. An event-shape-engineering technique is deployed to determine the $v_{2}$ background shape as a function of $m_{\rm inv}$. We extract a $v_2$-independent and $m_{\rm inv}$-averaged signal $螖纬_{\rm sig}$ = (0.03 $\pm$ 0.06 $\pm$ 0.08) $\times10^{-4}$, or $(2\pm4\pm5)\%$ of the inclusive $螖纬(m_{\rm inv}>0.4$ GeV/$c^2$)$ =(1.58 \pm 0.02 \pm 0.02) \times10^{-4}$, within pion $p_{T}$ = 0.2 - 0.8~\gevc and averaged over pseudorapidity ranges of $-1 < 畏< -0.05$ and $0.05 < 畏< 1$. This represents an upper limit of $0.23\times10^{-4}$, or $15\%$ of the inclusive result, at $95\%$ confidence level for the $m_{\rm inv}$-integrated CME contribution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.05035v2-abstract-full').style.display = 'none'; document.getElementById('2006.05035v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">PRC published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 106, 034908 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.00582">arXiv:2006.00582</a> <span> [<a href="https://arxiv.org/pdf/2006.00582">pdf</a>, <a href="https://arxiv.org/format/2006.00582">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.054913">10.1103/PhysRevC.102.054913 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of inclusive charged-particle jet production in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (340 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.00582v3-abstract-short" style="display: inline;"> The STAR Collaboration at the Relativistic Heavy Ion Collider reports the first measurement of inclusive jet production in peripheral and central Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. Jets are reconstructed with the anti-k$_{T}$ algorithm using charged tracks with pseudorapidity $|畏|<1.0$ and transverse momentum $0.2<p_{T,jet}^{ch}<30$ GeV/$c$, with jet resolution parameter $R$=0.2, 0.3, an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00582v3-abstract-full').style.display = 'inline'; document.getElementById('2006.00582v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.00582v3-abstract-full" style="display: none;"> The STAR Collaboration at the Relativistic Heavy Ion Collider reports the first measurement of inclusive jet production in peripheral and central Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. Jets are reconstructed with the anti-k$_{T}$ algorithm using charged tracks with pseudorapidity $|畏|<1.0$ and transverse momentum $0.2<p_{T,jet}^{ch}<30$ GeV/$c$, with jet resolution parameter $R$=0.2, 0.3, and 0.4. The large background yield uncorrelated with the jet signal is observed to be dominated by statistical phase space, consistent with a previous coincidence measurement. This background is suppressed by requiring a high-transverse-momentum (high-$p_T$) leading hadron in accepted jet candidates. The bias imposed by this requirement is assessed, and the $p_T$ region in which the bias is small is identified. Inclusive charged-particle jet distributions are reported in peripheral and central Au+Au collisions for $5<p_{T,jet}^{ch}<25$ GeV/$c$ and $5<p_{T,jet}^{ch}<30$ GeV/$c$, respectively. The charged-particle jet inclusive yield is suppressed for central Au+Au collisions, compared to both the peripheral Au+Au yield from this measurement and to the $pp$ yield calculated using the PYTHIA event generator. The magnitude of the suppression is consistent with that of inclusive hadron production at high $p_T$, and that of semi-inclusive recoil jet yield when expressed in terms of energy loss due to medium-induced energy transport. Comparison of inclusive charged-particle jet yields for different values of $R$ exhibits no significant evidence for medium-induced broadening of the transverse jet profile for $R<0.4$ in central Au+Au collisions. The measured distributions are consistent with theoretical model calculations that incorporate jet quenching. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00582v3-abstract-full').style.display = 'none'; document.getElementById('2006.00582v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">27 pages, 20 figures, submitted to Physical Review C, minor changes to the text/references applied to reflect the Phys. Rev. C style and the published version of the paper</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.C 102 (2020) 5, 054913 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.11078">arXiv:2004.11078</a> <span> [<a href="https://arxiv.org/pdf/2004.11078">pdf</a>, <a href="https://arxiv.org/format/2004.11078">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP07(2020)178">10.1007/JHEP07(2020)178 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at $\sqrt{s} = 200$ GeV with the STAR detector at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (340 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.11078v2-abstract-short" style="display: inline;"> We report on the measurement of the Central Exclusive Production of charged particle pairs $h^{+}h^{-}$ ($h = 蟺, K, p$) with the STAR detector at RHIC in proton-proton collisions at $\sqrt{s} = 200$ GeV. The charged particle pairs produced in the reaction $pp\to p^\prime+h^{+}h^{-}+p^\prime$ are reconstructed from the tracks in the central detector, while the forward-scattered protons are measured… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.11078v2-abstract-full').style.display = 'inline'; document.getElementById('2004.11078v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.11078v2-abstract-full" style="display: none;"> We report on the measurement of the Central Exclusive Production of charged particle pairs $h^{+}h^{-}$ ($h = 蟺, K, p$) with the STAR detector at RHIC in proton-proton collisions at $\sqrt{s} = 200$ GeV. The charged particle pairs produced in the reaction $pp\to p^\prime+h^{+}h^{-}+p^\prime$ are reconstructed from the tracks in the central detector, while the forward-scattered protons are measured in the Roman Pot system. Differential cross sections are measured in the fiducial region, which roughly corresponds to the square of the four-momentum transfers at the proton vertices in the range $0.04~\mbox{GeV}^2 < -t_1 , -t_2 < 0.2~\mbox{GeV}^2$, invariant masses of the charged particle pairs up to a few GeV and pseudorapidities of the centrally-produced hadrons in the range $|畏|<0.7$. The measured cross sections are compared to phenomenological predictions based on the Double Pomeron Exchange (DPE) model. Structures observed in the mass spectra of $蟺^{+}蟺^{-}$ and $K^{+}K^{-}$ pairs are consistent with the DPE model, while angular distributions of pions suggest a dominant spin-0 contribution to $蟺^{+}蟺^{-}$ production. The fiducial $蟺^+蟺^-$ cross section is extrapolated to the Lorentz-invariant region, which allows decomposition of the invariant mass spectrum into continuum and resonant contributions. The extrapolated cross section is well described by the continuum production and at least three resonances, the $f_0(980)$, $f_2(1270)$ and $f_0(1500)$, with a possible small contribution from the $f_0(1370)$. Fits to the extrapolated differential cross section as a function of $t_1$ and $t_2$ enable extraction of the exponential slope parameters in several bins of the invariant mass of $蟺^+蟺^-$ pairs. These parameters are sensitive to the size of the interaction region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.11078v2-abstract-full').style.display = 'none'; document.getElementById('2004.11078v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published in Journal of High Energy Physics</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 07 (2020) 178 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.12136">arXiv:2003.12136</a> <span> [<a href="https://arxiv.org/pdf/2003.12136">pdf</a>, <a href="https://arxiv.org/format/2003.12136">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2020.135663">10.1016/j.physletb.2020.135663 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Results on Total and Elastic Cross Sections in Proton-Proton Collisions at $\sqrt{s} = 200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (340 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.12136v2-abstract-short" style="display: inline;"> We report results on the total and elastic cross sections in proton-proton collisions at $\sqrt{s}=200$ GeV obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section was measured in the squared four-momentum transfer range $0.045 \leq -t \leq 0.135$ GeV$^2$. The value of the exponential slope parameter $B$ of the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.12136v2-abstract-full').style.display = 'inline'; document.getElementById('2003.12136v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.12136v2-abstract-full" style="display: none;"> We report results on the total and elastic cross sections in proton-proton collisions at $\sqrt{s}=200$ GeV obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section was measured in the squared four-momentum transfer range $0.045 \leq -t \leq 0.135$ GeV$^2$. The value of the exponential slope parameter $B$ of the elastic differential cross section $d蟽/dt \sim e^{-Bt}$ in the measured $-t$ range was found to be $B = 14.32 \pm 0.09 (stat.)^{\scriptstyle +0.13}_{\scriptstyle -0.28} (syst.)$ GeV$^{-2}$. The total cross section $蟽_{tot}$, obtained from extrapolation of the $d蟽/dt$ to the optical point at $-t = 0$, is $蟽_{tot} = 54.67 \pm 0.21 (stat.) ^{\scriptstyle +1.28}_{\scriptstyle -1.38} (syst.)$ mb. We also present the values of the elastic cross section $蟽_{el} = 10.85 \pm 0.03 (stat.) ^{\scriptstyle +0.49}_{\scriptstyle -0.41}(syst.)$ mb, the elastic cross section integrated within the STAR $t$-range $蟽^{det}_{el} = 4.05 \pm 0.01 (stat.) ^{\scriptstyle+0.18}_{\scriptstyle -0.17}(syst.)$ mb, and the inelastic cross section $蟽_{inel} = 43.82 \pm 0.21 (stat.) ^{\scriptstyle +1.37}_{\scriptstyle -1.44} (syst.)$ mb. The results are compared with the world data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.12136v2-abstract-full').style.display = 'none'; document.getElementById('2003.12136v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Updated version. New figure 4 and updated text. Accepted for publication in Phys. Lett. B</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2001.06419">arXiv:2001.06419</a> <span> [<a href="https://arxiv.org/pdf/2001.06419">pdf</a>, <a href="https://arxiv.org/ps/2001.06419">ps</a>, <a href="https://arxiv.org/format/2001.06419">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.024903">10.1103/PhysRevC.102.024903 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beam energy dependence of net-$螞$ fluctuations measured by the STAR experiment at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (334 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2001.06419v1-abstract-short" style="display: inline;"> The measurements of particle multiplicity distributions have generated considerable interest in understanding the fluctuations of conserved quantum numbers in the Quantum Chromodynamics (QCD) hadronization regime, in particular near a possible critical point and near the chemical freeze-out. We report the measurement of efficiency and centrality bin width corrected cumulant ratios ($C_{2}/C_{1}$,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.06419v1-abstract-full').style.display = 'inline'; document.getElementById('2001.06419v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2001.06419v1-abstract-full" style="display: none;"> The measurements of particle multiplicity distributions have generated considerable interest in understanding the fluctuations of conserved quantum numbers in the Quantum Chromodynamics (QCD) hadronization regime, in particular near a possible critical point and near the chemical freeze-out. We report the measurement of efficiency and centrality bin width corrected cumulant ratios ($C_{2}/C_{1}$, $C_{3}/C_{2}$) of net-$螞$ distributions, in the context of both strangeness and baryon number conservation, as a function of collision energy, centrality and rapidity. The results are for Au + Au collisions at five beam energies ($\sqrt{s_{NN}}$ = 19.6, 27, 39, 62.4 and 200 GeV) recorded with the Solenoidal Tracker at RHIC (STAR). We compare our results to the Poisson and negative binomial (NBD) expectations, as well as to Ultra-relativistic Quantum Molecular Dynamics (UrQMD) and Hadron Resonance Gas (HRG) model predictions. Both NBD and Poisson baselines agree with data within the statistical and systematic uncertainties. The ratios of the measured cumulants show no features of critical fluctuations. The chemical freeze-out temperatures extracted from a recent HRG calculation, which was successfully used to describe the net-proton, net-kaon and net-charge data, indicate $螞$ freeze-out conditions similar to those of kaons. However, large deviations are found when comparing to temperatures obtained from net-proton fluctuations. The net-$螞$ cumulants show a weak, but finite, dependence on the rapidity coverage in the acceptance of the detector, which can be attributed to quantum number conservation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.06419v1-abstract-full').style.display = 'none'; document.getElementById('2001.06419v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 January, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 9 figures, 3 tables, submitted to Phys.Rev.C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 024903 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2001.02852">arXiv:2001.02852</a> <span> [<a href="https://arxiv.org/pdf/2001.02852">pdf</a>, <a href="https://arxiv.org/format/2001.02852">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.126.092301">10.1103/PhysRevLett.126.092301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Non-monotonic energy dependence of net-proton number fluctuations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (334 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2001.02852v3-abstract-short" style="display: inline;"> Non-monotonic variation with collision energy ($\sqrt{s_{\rm NN}}$) of the moments of the net-baryon number distribution in heavy-ion collisions, related to the correlation length and the susceptibilities of the system, is suggested as a signature for the Quantum Chromodynamics (QCD) critical point. We report the first evidence of a non-monotonic variation in kurtosis times variance of the net-pro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.02852v3-abstract-full').style.display = 'inline'; document.getElementById('2001.02852v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2001.02852v3-abstract-full" style="display: none;"> Non-monotonic variation with collision energy ($\sqrt{s_{\rm NN}}$) of the moments of the net-baryon number distribution in heavy-ion collisions, related to the correlation length and the susceptibilities of the system, is suggested as a signature for the Quantum Chromodynamics (QCD) critical point. We report the first evidence of a non-monotonic variation in kurtosis times variance of the net-proton number (proxy for net-baryon number) distribution as a function of \rootsnn with 3.1$蟽$ significance, for head-on (central) gold-on-gold (Au+Au) collisions measured using the STAR detector at RHIC. Data in non-central Au+Au collisions and models of heavy-ion collisions without a critical point show a monotonic variation as a function of $\sqrt{s_{\rm NN}}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.02852v3-abstract-full').style.display = 'none'; document.getElementById('2001.02852v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 January, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 Pages, 9 Figures and 5 Tables (published version)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review Letters 126 (2021) 092301 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.08187">arXiv:1912.08187</a> <span> [<a href="https://arxiv.org/pdf/1912.08187">pdf</a>, <a href="https://arxiv.org/format/1912.08187">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.101.052004">10.1103/PhysRevD.101.052004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Underlying event measurements in $p$+$p$ collisions at $\sqrt{s}= 200 $ GeV at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (334 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.08187v1-abstract-short" style="display: inline;"> Particle production sensitive to non-factorizable and non-perturbative processes that contribute to the underlying event associated with a high transverse momentum ($p_{T}$) jet in proton+proton collisions at $\sqrt{s}$=200 GeV is studied with the STAR detector. Each event is divided into three regions based on the azimuthal angle with respect to the highest-$p_{T}$ jet direction: in the leading j… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.08187v1-abstract-full').style.display = 'inline'; document.getElementById('1912.08187v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.08187v1-abstract-full" style="display: none;"> Particle production sensitive to non-factorizable and non-perturbative processes that contribute to the underlying event associated with a high transverse momentum ($p_{T}$) jet in proton+proton collisions at $\sqrt{s}$=200 GeV is studied with the STAR detector. Each event is divided into three regions based on the azimuthal angle with respect to the highest-$p_{T}$ jet direction: in the leading jet direction ("Toward"), opposite to the leading jet ("Away"), and perpendicular to the leading jet ("Transverse"). In the Transverse region, the average charged particle density is found to be between 0.4 and 0.6 and the mean transverse momentum, $\langle p_{T}\rangle$, between 0.5-0.7 GeV/$c$ for particles with $p_{T}$$>$0.2 GeV/$c$ at mid-pseudorapidity ($|畏|$$<$1) and jet $p_{T}$$>$15 GeV/$c$. Both average particle density and $\langle p_{T}\rangle$ depend weakly on the leading jet $p_{T}$. Closer inspection of the Transverse region hints that contributions to the underlying event from initial- and final-state radiation are significantly smaller in these collisions than at the higher energies, up to 13 TeV, recorded at the LHC. Underlying event measurements associated with a high-$p_{T}$ jet will contribute to our understanding of QCD processes at hard and soft scales at RHIC energies, as well as provide constraints to modeling of underlying event dynamics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.08187v1-abstract-full').style.display = 'none'; document.getElementById('1912.08187v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 101, 052004 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.12168">arXiv:1911.12168</a> <span> [<a href="https://arxiv.org/pdf/1911.12168">pdf</a>, <a href="https://arxiv.org/format/1911.12168">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.014905">10.1103/PhysRevC.102.014905 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of D$^0$-meson + hadron two-dimensional angular correlations in Au+Au collisions at $\sqrt{s_{\rm NN}} = $ 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (333 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.12168v2-abstract-short" style="display: inline;"> Open heavy flavor hadrons provide unique probes of the medium produced in ultra-relativistic heavy-ion collisions. Due to their increased mass relative to light-flavor hadrons, long lifetime, and early production in hard-scattering interactions, they provide access to the full evolution of the partonic medium formed in heavy-ion collisions. This paper reports two-dimensional (2D) angular correlati… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.12168v2-abstract-full').style.display = 'inline'; document.getElementById('1911.12168v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.12168v2-abstract-full" style="display: none;"> Open heavy flavor hadrons provide unique probes of the medium produced in ultra-relativistic heavy-ion collisions. Due to their increased mass relative to light-flavor hadrons, long lifetime, and early production in hard-scattering interactions, they provide access to the full evolution of the partonic medium formed in heavy-ion collisions. This paper reports two-dimensional (2D) angular correlations between neutral $D$-mesons and unidentified charged particles produced in minimum-bias Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV. $D^0$ and $\bar{D}^0$ mesons are reconstructed via their weak decay to $K^{\mp} 蟺^{\pm}$ using the Heavy Flavor Tracker (HFT) in the Solenoidal Tracker at RHIC (STAR) experiment. Correlations on relative pseudorapidity and azimuth $(螖畏,螖蠁)$ are presented for peripheral, mid-central and central collisions with $D^0$ transverse momentum from 2 to 10 GeV/$c$. Attention is focused on the 2D peaked correlation structure near the triggered $D^0$-meson, the {\em near-side} (NS) peak, which serves as a proxy for a charm-quark containing jet. The correlated NS yield of charged particles per $D^0$-meson and the 2D widths of the NS peak increase significantly from peripheral to central collisions. These results are compared with similar correlations using unidentified charged particles, consisting primarily of light-flavor hadrons, at similar trigger particle momenta. Similar per-trigger yields and widths of the NS correlation peak are observed. The present results provide additional evidence that $D^0$-mesons undergo significant interactions with the medium formed in heavy-ion collision and show, for the first time, significant centrality evolution of the NS 2D peak in the correlations of particles associated with a heavy-flavor hadron produced in these collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.12168v2-abstract-full').style.display = 'none'; document.getElementById('1911.12168v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 014905 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.00596">arXiv:1911.00596</a> <span> [<a href="https://arxiv.org/pdf/1911.00596">pdf</a>, <a href="https://arxiv.org/ps/1911.00596">ps</a>, <a href="https://arxiv.org/format/1911.00596">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Methods for a blind analysis of isobar data collected by the STAR collaboration </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (332 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.00596v1-abstract-short" style="display: inline;"> In 2018, the STAR collaboration collected data from $_{44}^{96}Ru+_{44}^{96}Ru$ and $_{40}^{96}Zr+_{40}^{96}Zr$ at $\sqrt{s_{NN}}=200$ GeV to search for the presence of the chiral magnetic effect in collisions of nuclei. The isobar collision species alternated frequently between $_{44}^{96}Ru+_{44}^{96}Ru$ and $_{40}^{96}Zr+_{40}^{96}Zr$. In order to conduct blind analyses of studies related to th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.00596v1-abstract-full').style.display = 'inline'; document.getElementById('1911.00596v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.00596v1-abstract-full" style="display: none;"> In 2018, the STAR collaboration collected data from $_{44}^{96}Ru+_{44}^{96}Ru$ and $_{40}^{96}Zr+_{40}^{96}Zr$ at $\sqrt{s_{NN}}=200$ GeV to search for the presence of the chiral magnetic effect in collisions of nuclei. The isobar collision species alternated frequently between $_{44}^{96}Ru+_{44}^{96}Ru$ and $_{40}^{96}Zr+_{40}^{96}Zr$. In order to conduct blind analyses of studies related to the chiral magnetic effect in these isobar data, STAR developed a three-step blind analysis procedure. Analysts are initially provided a "reference sample" of data, comprised of a mix of events from the two species, the order of which respects time-dependent changes in run conditions. After tuning analysis codes and performing time-dependent quality assurance on the reference sample, analysts are provided a species-blind sample suitable for calculating efficiencies and corrections for individual $\approx30$-minute data-taking runs. For this sample, species-specific information is disguised, but individual output files contain data from a single isobar species. Only run-by-run corrections and code alteration subsequent to these corrections are allowed at this stage. Following these modifications, the "frozen" code is passed over the fully un-blind data, completing the blind analysis. As a check of the feasibility of the blind analysis procedure, analysts completed a "mock data challenge," analyzing data from $Au+Au$ collisions at $\sqrt{s_{NN}}=27$ GeV, collected in 2018. The $Au+Au$ data were prepared in the same manner intended for the isobar blind data. The details of the blind analysis procedure and results from the mock data challenge are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.00596v1-abstract-full').style.display = 'none'; document.getElementById('1911.00596v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.14628">arXiv:1910.14628</a> <span> [<a href="https://arxiv.org/pdf/1910.14628">pdf</a>, <a href="https://arxiv.org/ps/1910.14628">ps</a>, <a href="https://arxiv.org/format/1910.14628">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.124.172301">10.1103/PhysRevLett.124.172301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First measurement of $螞_c$ baryon production in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (332 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1910.14628v2-abstract-short" style="display: inline;"> We report on the first measurement of the charmed baryon $螞_c^{\pm}$ production at midrapidity ($|y|$ $<$ 1) in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider. The $螞_c$/$D^0$ (denoting ($螞_c^++螞_c^-$)/($D^0+\bar{D^0}$)) yield ratio is measured to be 1.08 $\pm$ 0.16 (stat.) $\pm$ 0.26 (sys.) in the 0--20% most central Au+Au col… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.14628v2-abstract-full').style.display = 'inline'; document.getElementById('1910.14628v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.14628v2-abstract-full" style="display: none;"> We report on the first measurement of the charmed baryon $螞_c^{\pm}$ production at midrapidity ($|y|$ $<$ 1) in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider. The $螞_c$/$D^0$ (denoting ($螞_c^++螞_c^-$)/($D^0+\bar{D^0}$)) yield ratio is measured to be 1.08 $\pm$ 0.16 (stat.) $\pm$ 0.26 (sys.) in the 0--20% most central Au+Au collisions for the transverse momentum ($p_T$) range 3 $<$ $p_T$ $<$ 6 GeV/$c$. This is significantly larger than the PYTHIA model calculations for $p+p$ collisions. The measured $螞_c$/$D^0$ ratio, as a function of $p_T$ and collision centrality, is comparable to the baryon-to-meson ratios for light and strange hadrons in Au+Au collisions. Model calculations including coalescence hadronization for charmed baryon and meson formation reproduce the features of our measured $螞_c$/$D^0$ ratio. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.14628v2-abstract-full').style.display = 'none'; document.getElementById('1910.14628v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 124, 172301 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.12400">arXiv:1910.12400</a> <span> [<a href="https://arxiv.org/pdf/1910.12400">pdf</a>, <a href="https://arxiv.org/format/1910.12400">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.127.052302">10.1103/PhysRevLett.127.052302 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $e^+e^-$ Momentum and Angular Distributions from Linearly Polarized Photon Collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Abdallah%2C+M+S">M. S. Abdallah</a>, <a href="/search/nucl-ex?searchtype=author&query=Aboona%2C+B+E">B. E. Aboona</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+I">I. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+W">W. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Cap%2C+J+G+B">J. G. Ball Cap</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a> , et al. (373 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1910.12400v2-abstract-short" style="display: inline;"> The Breit-Wheeler process which produces matter and anti-matter from photon collisions is investigated experimentally through the observation of 6085 exclusive electron-positron pairs in ultra-peripheral Au+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The measurements reveal a large fourth-order angular modulation of $\cos{4螖蠁}=(16.8\pm2.5)\%$ and smooth invariant mass distribution absent of vecto… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.12400v2-abstract-full').style.display = 'inline'; document.getElementById('1910.12400v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.12400v2-abstract-full" style="display: none;"> The Breit-Wheeler process which produces matter and anti-matter from photon collisions is investigated experimentally through the observation of 6085 exclusive electron-positron pairs in ultra-peripheral Au+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The measurements reveal a large fourth-order angular modulation of $\cos{4螖蠁}=(16.8\pm2.5)\%$ and smooth invariant mass distribution absent of vector mesons ($蠁$, $蠅$ and $蟻$) at the experimental limit of $\le 0.2\%$ of the observed yields. The differential cross section as a function of $e^+e^-$ pair transverse momentum $P_\perp$ peaks at low value with $\sqrt{ \langle P_\perp^2 \rangle } = 38.1\pm0.9$ MeV and displays a significant centrality dependence. These features are consistent with QED calculations for the collision of linearly polarized photons quantized from the extremely strong electromagnetic fields generated by the highly charged Au nuclei at ultra-relativistic speed. The experimental results have implications for vacuum birefringence and for mapping the magnetic field which is important for emergent QCD phenomena. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.12400v2-abstract-full').style.display = 'none'; document.getElementById('1910.12400v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Keywords: Ultra-peripheral collisions, Breit-Wheeler process, vacuum birefringence, two-photon process, QED under extreme conditions, strong fields</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 127, 052302 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.03585">arXiv:1908.03585</a> <span> [<a href="https://arxiv.org/pdf/1908.03585">pdf</a>, <a href="https://arxiv.org/ps/1908.03585">ps</a>, <a href="https://arxiv.org/format/1908.03585">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.101.024905">10.1103/PhysRevC.101.024905 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Bulk Properties of the System Formed in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 14.5 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aoyama%2C+R">R. Aoyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Bassill%2C+A+J">A. J. Bassill</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhati%2C+A+K">A. K. Bhati</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a> , et al. (324 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.03585v1-abstract-short" style="display: inline;"> We report systematic measurements of bulk properties of the system created in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 14.5 GeV recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC).The transverse momentum spectra of $蟺^{\pm}$, $K^{\pm}$ and $p(\bar{p})$ are studied at mid-rapidity ($|y| < 0.1$) for nine centrality intervals. The centrality, transverse momentum ($p_T$),… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.03585v1-abstract-full').style.display = 'inline'; document.getElementById('1908.03585v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.03585v1-abstract-full" style="display: none;"> We report systematic measurements of bulk properties of the system created in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 14.5 GeV recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC).The transverse momentum spectra of $蟺^{\pm}$, $K^{\pm}$ and $p(\bar{p})$ are studied at mid-rapidity ($|y| < 0.1$) for nine centrality intervals. The centrality, transverse momentum ($p_T$),and pseudorapidity ($畏$) dependence of inclusive charged particle elliptic flow ($v_2$), and rapidity-odd charged particles directed flow ($v_{1}$) results near mid-rapidity are also presented. These measurements are compared with the published results from Au+Au collisions at other energies, and from Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV. The results at $\sqrt{s_{\mathrm{NN}}}$ = 14.5 GeV show similar behavior as established at other energies and fit well in the energy dependence trend. These results are important as the 14.5 GeV energy fills the gap in $渭_B$, which is of the order of 100 MeV,between $\sqrt{s_{\mathrm{NN}}}$ =11.5 and 19.6 GeV. Comparisons of the data with UrQMD and AMPT models show poor agreement in general. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.03585v1-abstract-full').style.display = 'none'; document.getElementById('1908.03585v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">30 pages, 29 figures and 8 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 101, 024905 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.09204">arXiv:1906.09204</a> <span> [<a href="https://arxiv.org/pdf/1906.09204">pdf</a>, <a href="https://arxiv.org/format/1906.09204">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.101.014916">10.1103/PhysRevC.101.014916 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beam-energy dependence of identified two-particle angular correlations in Au+Au collisions at RHIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F+G">F. G. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcik%2C+J">J. Bielcik</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielcikova%2C+J">J. Bielcikova</a>, <a href="/search/nucl-ex?searchtype=author&query=Bland%2C+L+C">L. C. Bland</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordyuzhin%2C+I+G">I. G. Bordyuzhin</a> , et al. (332 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.09204v2-abstract-short" style="display: inline;"> The two-particle angular correlation functions, $R_2$, of pions, kaons, and protons in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV were measured by the STAR experiment at RHIC. These correlations were measured for both like-sign and unlike-sign charge combinations and versus the centrality. The correlations of pions and kaons show the expected near-side ({… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.09204v2-abstract-full').style.display = 'inline'; document.getElementById('1906.09204v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.09204v2-abstract-full" style="display: none;"> The two-particle angular correlation functions, $R_2$, of pions, kaons, and protons in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV were measured by the STAR experiment at RHIC. These correlations were measured for both like-sign and unlike-sign charge combinations and versus the centrality. The correlations of pions and kaons show the expected near-side ({\it i.e.}, at small relative angles) peak resulting from short-range mechanisms. The amplitudes of these short-range correlations decrease with increasing beam energy. However, the proton correlation functions exhibit strong anticorrelations in the near-side region. This behavior is observed for the first time in an A+A collision system. The observed anticorrelation is $p_{T}$-independent and decreases with increasing beam energy and centrality. The experimental results are also compared to the Monte Carlo models UrQMD, Hijing, and AMPT. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.09204v2-abstract-full').style.display = 'none'; document.getElementById('1906.09204v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 101, 014916 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.03732">arXiv:1906.03732</a> <span> [<a href="https://arxiv.org/pdf/1906.03732">pdf</a>, <a href="https://arxiv.org/format/1906.03732">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.034909">10.1103/PhysRevC.102.034909 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Strange hadron production in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 7.7, 11.5, 19.6, 27, and 39 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aoyama%2C+R">R. Aoyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Arkhipkin%2C+D">D. Arkhipkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F">F. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Bassill%2C+A+J">A. J. Bassill</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhati%2C+A+K">A. K. Bhati</a> , et al. (328 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.03732v3-abstract-short" style="display: inline;"> We present STAR measurements of strange hadron ($\mathrm{K}^{0}_{\mathrm S}$, $螞$, $\overline螞$, $螢^-$, $\overline螢^+$, $惟^-$, $\overline惟^+$, and $蠁$) production at mid-rapidity ($|y| < 0.5$) in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 7.7 - 39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse momentum spectra, averaged transverse mass, and t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.03732v3-abstract-full').style.display = 'inline'; document.getElementById('1906.03732v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.03732v3-abstract-full" style="display: none;"> We present STAR measurements of strange hadron ($\mathrm{K}^{0}_{\mathrm S}$, $螞$, $\overline螞$, $螢^-$, $\overline螢^+$, $惟^-$, $\overline惟^+$, and $蠁$) production at mid-rapidity ($|y| < 0.5$) in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 7.7 - 39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse momentum spectra, averaged transverse mass, and the overall integrated yields of these strange hadrons are presented versus the centrality and collision energy. Antibaryon-to-baryon ratios ($\overline螞$/$螞$, $\overline螢^+$/$螢^-$, $\overline惟^+$/$惟^-$) are presented as well, and used to test a thermal statistical model and to extract the temperature normalized strangeness and baryon chemical potentials at hadronic freeze-out ($渭_{B}/T_{\rm ch}$ and $渭_{S}/T_{\rm ch}$) in central collisions. Strange baryon-to-pion ratios are compared to various model predictions in central collisions for all energies. The nuclear modification factors ($R_{\textrm{CP}}$) and antibaryon-to-meson ratios as a function of transverse momentum are presented for all collision energies. The $\mathrm{K}^{0}_{\mathrm S}$ $R_{\textrm{CP}}$ shows no suppression for $p_{\rm T}$ up to 3.5 $\mathrm{GeV} / c$ at energies of 7.7 and 11.5 GeV. The $\overline螞$/$\mathrm{K}^{0}_{\mathrm S}$ ratio also shows baryon-to-meson enhancement at intermediate $p_{\rm T}$ ($\approx$2.5 $\mathrm{GeV} / c$) in central collisions at energies above 19.6 GeV. Both observations suggest that there is likely a change of the underlying strange quark dynamics at collision energies below 19.6 GeV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.03732v3-abstract-full').style.display = 'none'; document.getElementById('1906.03732v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, 29 figures, version accepted by Physical Review C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 034909 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.02740">arXiv:1906.02740</a> <span> [<a href="https://arxiv.org/pdf/1906.02740">pdf</a>, <a href="https://arxiv.org/format/1906.02740">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.100.052005">10.1103/PhysRevD.100.052005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Longitudinal double-spin asymmetry for inclusive jet and dijet production in $pp$ collisions at $\sqrt{s} = 510$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aoyama%2C+R">R. Aoyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Arkhipkin%2C+D">D. Arkhipkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F">F. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Bassill%2C+A+J">A. J. Bassill</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhati%2C+A+K">A. K. Bhati</a> , et al. (328 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.02740v1-abstract-short" style="display: inline;"> We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, $A_{LL}$, at midrapidity in polarized $pp$ collisions at a center-of-mass energy $\sqrt{s} = 510$ GeV. The inclusive jet $A_{LL}$ measurement is sensitive to the gluon helicity distribution down to a gluon momentum fraction of $x\approx 0.015$, while the dijet measurements, separated into four… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.02740v1-abstract-full').style.display = 'inline'; document.getElementById('1906.02740v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.02740v1-abstract-full" style="display: none;"> We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, $A_{LL}$, at midrapidity in polarized $pp$ collisions at a center-of-mass energy $\sqrt{s} = 510$ GeV. The inclusive jet $A_{LL}$ measurement is sensitive to the gluon helicity distribution down to a gluon momentum fraction of $x\approx 0.015$, while the dijet measurements, separated into four jet-pair topologies, provide constraints on the $x$ dependence of the gluon polarization. Both results are consistent with previous measurements made at $\sqrt{s}= 200$ GeV in the overlapping kinematic region, $x > 0.05$, and show good agreement with predictions from recent next-to-leading order global analyses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.02740v1-abstract-full').style.display = 'none'; document.getElementById('1906.02740v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 100, 052005 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.13669">arXiv:1905.13669</a> <span> [<a href="https://arxiv.org/pdf/1905.13669">pdf</a>, <a href="https://arxiv.org/format/1905.13669">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2019.134917">10.1016/j.physletb.2019.134917 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of inclusive $J/蠄$ suppression in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV through the dimuon channel at STAR </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aoyama%2C+R">R. Aoyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Arkhipkin%2C+D">D. Arkhipkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F">F. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Bassill%2C+A+J">A. J. Bassill</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhati%2C+A+K">A. K. Bhati</a> , et al. (328 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.13669v1-abstract-short" style="display: inline;"> $J/蠄$ suppression has long been considered a sensitive signature of the formation of the Quark-Gluon Plasma (QGP) in relativistic heavy-ion collisions. In this letter, we present the first measurement of inclusive $J/蠄$ production at mid-rapidity through the dimuon decay channel in Au+Au collisions at $\sqrt{s_{NN}}… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13669v1-abstract-full').style.display = 'inline'; document.getElementById('1905.13669v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.13669v1-abstract-full" style="display: none;"> $J/蠄$ suppression has long been considered a sensitive signature of the formation of the Quark-Gluon Plasma (QGP) in relativistic heavy-ion collisions. In this letter, we present the first measurement of inclusive $J/蠄$ production at mid-rapidity through the dimuon decay channel in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV with the STAR experiment. These measurements became possible after the installation of the Muon Telescope Detector was completed in 2014. The $J/蠄$ yields are measured in a wide transverse momentum ($p_{\rm{T}}$) range of 0.15 GeV/$c$ to 12 GeV/$c$ from central to peripheral collisions. They extend the kinematic reach of previous measurements at RHIC with improved precision. In the 0-10% most central collisions, the $J/蠄$ yield is suppressed by a factor of approximately 3 for $p_{\rm{T}}>5$ GeV/$c$ relative to that in p+p collisions scaled by the number of binary nucleon-nucleon collisions. The $J/蠄$ nuclear modification factor displays little dependence on $p_{\rm{T}}$ in all centrality bins. Model calculations can qualitatively describe the data, providing further evidence for the color-screening effect experienced by $J/蠄$ mesons in the QGP. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13669v1-abstract-full').style.display = 'none'; document.getElementById('1905.13669v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 797, 134917 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.11917">arXiv:1905.11917</a> <span> [<a href="https://arxiv.org/pdf/1905.11917">pdf</a>, <a href="https://arxiv.org/ps/1905.11917">ps</a>, <a href="https://arxiv.org/format/1905.11917">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.123.132301">10.1103/PhysRevLett.123.132301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Polarization of $螞$ ($\bar螞$) hyperons along the beam direction in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aoyama%2C+R">R. Aoyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Arkhipkin%2C+D">D. Arkhipkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F">F. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Bassill%2C+A+J">A. J. Bassill</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhati%2C+A+K">A. K. Bhati</a> , et al. (328 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.11917v1-abstract-short" style="display: inline;"> The $螞$ ($\bar螞$) hyperon polarization along the beam direction has been measured for the first time in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV. The polarization dependence on the hyperons' emission angle relative to the second-order event plane exhibits a sine modulation, indicating a quadrupole pattern of the vorticity component along the beam direction. The polarization is found to inc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.11917v1-abstract-full').style.display = 'inline'; document.getElementById('1905.11917v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.11917v1-abstract-full" style="display: none;"> The $螞$ ($\bar螞$) hyperon polarization along the beam direction has been measured for the first time in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV. The polarization dependence on the hyperons' emission angle relative to the second-order event plane exhibits a sine modulation, indicating a quadrupole pattern of the vorticity component along the beam direction. The polarization is found to increase in more peripheral collisions, and shows no strong transverse momentum ($p_T$) dependence at $p_T>1$ GeV/$c$. The magnitude of the signal is about five times smaller than those predicted by hydrodynamic and multiphase transport models; the observed phase of the emission angle dependence is also opposite to these model predictions. In contrast, blast-wave model calculations reproduce the modulation phase measured in the data and capture the centrality and transverse momentum dependence of the signal once the model is required to reproduce the azimuthal dependence of the Gaussian source radii measured via the Hanbury-Brown and Twiss intensity interferometry technique. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.11917v1-abstract-full').style.display = 'none'; document.getElementById('1905.11917v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 figures, Submitted to Phys. Rev. Lett</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 123, 132301 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.06075">arXiv:1905.06075</a> <span> [<a href="https://arxiv.org/pdf/1905.06075">pdf</a>, <a href="https://arxiv.org/ps/1905.06075">ps</a>, <a href="https://arxiv.org/format/1905.06075">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.100.052009">10.1103/PhysRevD.100.052009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of the transverse-momentum-dependent cross sections of $J/蠄$ production at mid-rapidity in proton+proton collisions at $\sqrt{s} =$ 510 and 500 GeV with the STAR detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=STAR+Collaboration"> STAR Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+J+R">J. R. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Adkins%2C+J+K">J. K. Adkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Agakishiev%2C+G">G. Agakishiev</a>, <a href="/search/nucl-ex?searchtype=author&query=Aggarwal%2C+M+M">M. M. Aggarwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahammed%2C+Z">Z. Ahammed</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+D+M">D. M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aoyama%2C+R">R. Aoyama</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparin%2C+A">A. Aparin</a>, <a href="/search/nucl-ex?searchtype=author&query=Arkhipkin%2C+D">D. Arkhipkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Ashraf%2C+M+U">M. U. Ashraf</a>, <a href="/search/nucl-ex?searchtype=author&query=Atetalla%2C+F">F. Atetalla</a>, <a href="/search/nucl-ex?searchtype=author&query=Attri%2C+A">A. Attri</a>, <a href="/search/nucl-ex?searchtype=author&query=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Bairathi%2C+V">V. Bairathi</a>, <a href="/search/nucl-ex?searchtype=author&query=Barish%2C+K">K. Barish</a>, <a href="/search/nucl-ex?searchtype=author&query=Bassill%2C+A+J">A. J. Bassill</a>, <a href="/search/nucl-ex?searchtype=author&query=Behera%2C+A">A. Behera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhasin%2C+A">A. Bhasin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhati%2C+A+K">A. K. Bhati</a> , et al. (328 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.06075v3-abstract-short" style="display: inline;"> We present measurements of the differential cross sections of inclusive $J/蠄$ meson production as a function of transverse momentum ($p_{T}^{J/蠄}$) using the $渭^{+}渭^{-}$ and $e^{+}e^{-}$ decay channels in proton+proton collisions at center-of-mass energies of 510 and 500 GeV, respectively, recorded by the STAR detector at the Relativistic Heavy Ion Collider. The measurement from the $渭^{+}渭^{-}$… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.06075v3-abstract-full').style.display = 'inline'; document.getElementById('1905.06075v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.06075v3-abstract-full" style="display: none;"> We present measurements of the differential cross sections of inclusive $J/蠄$ meson production as a function of transverse momentum ($p_{T}^{J/蠄}$) using the $渭^{+}渭^{-}$ and $e^{+}e^{-}$ decay channels in proton+proton collisions at center-of-mass energies of 510 and 500 GeV, respectively, recorded by the STAR detector at the Relativistic Heavy Ion Collider. The measurement from the $渭^{+}渭^{-}$ channel is for 0 $< p_{T}^{J/蠄} <$ 9 GeV/$c$ and rapidity range $|y^{J/蠄}| < $ 0.4, and that from the $e^{+}e^{-}$ channel is for 4 $< p_{T}^{J/蠄} <$ 20 GeV/$c$ and $|y^{J/蠄}| < $ 1.0. The $蠄(2S)$ to $J/蠄$ ratio is also measured for 4 $< p_{T}^{\rm meson} <$ 12 GeV/$c$ through the $e^{+}e^{-}$ decay channel. Model calculations, which incorporate different approaches toward the $J/蠄$ production mechanism, are compared with experimental results and show reasonable agreement within uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.06075v3-abstract-full').style.display = 'none'; document.getElementById('1905.06075v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. 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