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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=Bultmann%2C+S&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Bultmann%2C+S&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Bultmann%2C+S&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/2409.08365">arXiv:2409.08365</a> <span> [<a href="https://arxiv.org/pdf/2409.08365">pdf</a>, <a href="https://arxiv.org/format/2409.08365">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"> Measurement of the nucleon spin structure functions for 0.01<$Q^2$<1 GeV$^2$ using CLAS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S+E">S. E. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Ripani%2C+M">M. Ripani</a>, <a href="/search/nucl-ex?searchtype=author&query=Zheng%2C+X">X. Zheng</a>, <a href="/search/nucl-ex?searchtype=author&query=Acar%2C+A+G">A. G. Acar</a>, <a href="/search/nucl-ex?searchtype=author&query=Achenbach%2C+P">P. Achenbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Alvarado%2C+J+S">J. S. Alvarado</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">W. R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Atac%2C+H">H. Atac</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Baashen%2C+L">L. Baashen</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Benkel%2C+B">B. Benkel</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bianconi%2C+A">A. Bianconi</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Booth%2C+W+A">W. A. Booth</a>, <a href="/search/nucl-ex?searchtype=author&query=ossu%2C+F+B">F. B ossu</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a> , et al. (124 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="2409.08365v2-abstract-short" style="display: inline;"> The spin structure functions of the proton and the deuteron were measured during the EG4 experiment at Jefferson Lab in 2006. Data were collected for longitudinally polarized electron scattering off longitudinally polarized NH$_3$ and ND$_3$ targets, for $Q^2$ values as small as 0.012 and 0.02 GeV$^2$, respectively, using the CEBAF Large Acceptance Spectrometer (CLAS). This is the archival paper o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.08365v2-abstract-full').style.display = 'inline'; document.getElementById('2409.08365v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.08365v2-abstract-full" style="display: none;"> The spin structure functions of the proton and the deuteron were measured during the EG4 experiment at Jefferson Lab in 2006. Data were collected for longitudinally polarized electron scattering off longitudinally polarized NH$_3$ and ND$_3$ targets, for $Q^2$ values as small as 0.012 and 0.02 GeV$^2$, respectively, using the CEBAF Large Acceptance Spectrometer (CLAS). This is the archival paper of the EG4 experiment that summaries the previously reported results of the polarized structure functions $g_1$, $A_1F_1$, and their moments $\overline 螕_1$, $\overline 纬_0$, and $\overline I_{TT}$, for both the proton and the deuteron. In addition, we report on new results on the neutron $g_1$ extracted by combining proton and deuteron data and correcting for Fermi smearing, and on the neutron moments $\overline 螕_1$, $\overline 纬_0$, and $\overline I_{TT}$ formed directly from those of the proton and the deuteron. Our data are in good agreement with the Gerasimov-Drell-Hearn sum rule for the proton, deuteron, and neutron. Furthermore, the isovector combination was formed for $g_1$ and the Bjorken integral $\overline 螕_1^{p-n}$, and compared to available theoretical predictions. All of our results provide for the first time extensive tests of spin observable predictions from chiral effective field theory ($蠂$EFT) in a $Q^2$ range commensurate with the pion mass. They motivate further improvement in $蠂$EFT calculations from other approaches such as the lattice gauge method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.08365v2-abstract-full').style.display = 'none'; document.getElementById('2409.08365v2-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </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">33 pages. 26 figures. Data table provided as supplementary material (30 pages latex and csv tables)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-24-4184, DOE/OR/23177-7672 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.15539">arXiv:2406.15539</a> <span> [<a href="https://arxiv.org/pdf/2406.15539">pdf</a>, <a href="https://arxiv.org/format/2406.15539">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"> First Measurement of Deeply Virtual Compton Scattering on the Neutron with Detection of the Active Neutron </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=CLAS+Collaboration"> CLAS Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Hobart%2C+A">A. Hobart</a>, <a href="/search/nucl-ex?searchtype=author&query=Niccolai%2C+S">S. Niccolai</a>, <a href="/search/nucl-ex?searchtype=author&query=%C4%8Cui%C4%87%2C+M">M. 膶ui膰</a>, <a href="/search/nucl-ex?searchtype=author&query=Kumeri%C4%8Dki%2C+K">K. Kumeri膷ki</a>, <a href="/search/nucl-ex?searchtype=author&query=Achenbach%2C+P">P. Achenbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Alvarado%2C+J+S">J. S. Alvarado</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">W. R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Atac%2C+H">H. Atac</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Baashen%2C+L">L. Baashen</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Benkel%2C+B">B. Benkel</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bianconi%2C+A">A. Bianconi</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bondi%2C+M">M. Bondi</a>, <a href="/search/nucl-ex?searchtype=author&query=Booth%2C+W+A">W. A. Booth</a>, <a href="/search/nucl-ex?searchtype=author&query=Boss%C3%B9%2C+F">F. Boss霉</a>, <a href="/search/nucl-ex?searchtype=author&query=Brinkmann%2C+K+-">K. -Th. Brinkmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a> , et al. (124 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="2406.15539v2-abstract-short" style="display: inline;"> Measuring Deeply Virtual Compton Scattering on the neutron is one of the necessary steps to understand the structure of the nucleon in terms of Generalized Parton Distributions (GPDs). Neutron targets play a complementary role to transversely polarized proton targets in the determination of the GPD $E$. This poorly known and poorly constrained GPD is essential to obtain the contribution of the qua… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15539v2-abstract-full').style.display = 'inline'; document.getElementById('2406.15539v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.15539v2-abstract-full" style="display: none;"> Measuring Deeply Virtual Compton Scattering on the neutron is one of the necessary steps to understand the structure of the nucleon in terms of Generalized Parton Distributions (GPDs). Neutron targets play a complementary role to transversely polarized proton targets in the determination of the GPD $E$. This poorly known and poorly constrained GPD is essential to obtain the contribution of the quarks' angular momentum to the spin of the nucleon. DVCS on the neutron was measured for the first time selecting the exclusive final state by detecting the neutron, using the Jefferson Lab longitudinally polarized electron beam, with energies up to 10.6 GeV, and the CLAS12 detector. The extracted beam-spin asymmetries, combined with DVCS observables measured on the proton, allow a clean quark-flavor separation of the imaginary parts of the GPDs $H$ and $E$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15539v2-abstract-full').style.display = 'none'; document.getElementById('2406.15539v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </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, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-24-4089 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.01904">arXiv:2402.01904</a> <span> [<a href="https://arxiv.org/pdf/2402.01904">pdf</a>, <a href="https://arxiv.org/format/2402.01904">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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 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.nima.2024.169190">10.1016/j.nima.2024.169190 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design, Construction, and Performance of the GEM based Radial Time Projection Chamber for the BONuS12 Experiment with CLAS12 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Albayrak%2C+I">I. Albayrak</a>, <a href="/search/nucl-ex?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Baron%2C+P">P. Baron</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Charles%2C+G">G. Charles</a>, <a href="/search/nucl-ex?searchtype=author&query=Christy%2C+M+E">M. E. Christy</a>, <a href="/search/nucl-ex?searchtype=author&query=Dodge%2C+G">G. Dodge</a>, <a href="/search/nucl-ex?searchtype=author&query=Dzbenski%2C+N">N. Dzbenski</a>, <a href="/search/nucl-ex?searchtype=author&query=Dupr%C3%A9%2C+R">R. Dupr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Griffioen%2C+K">K. Griffioen</a>, <a href="/search/nucl-ex?searchtype=author&query=Hattawy%2C+M">M. Hattawy</a>, <a href="/search/nucl-ex?searchtype=author&query=Hung%2C+Y+C">Y. C. Hung</a>, <a href="/search/nucl-ex?searchtype=author&query=Kalantarians%2C+N">N. Kalantarians</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S">S. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Mandjavidze%2C+I">I. Mandjavidze</a>, <a href="/search/nucl-ex?searchtype=author&query=Nadeeshani%2C+A">A. Nadeeshani</a>, <a href="/search/nucl-ex?searchtype=author&query=Ouillon%2C+M">M. Ouillon</a>, <a href="/search/nucl-ex?searchtype=author&query=Pandey%2C+P">P. Pandey</a>, <a href="/search/nucl-ex?searchtype=author&query=Payette%2C+D">D. Payette</a>, <a href="/search/nucl-ex?searchtype=author&query=Pokhrel%2C+M">M. Pokhrel</a>, <a href="/search/nucl-ex?searchtype=author&query=Poudel%2C+J">J. Poudel</a>, <a href="/search/nucl-ex?searchtype=author&query=Tadepalli%2C+A+S">A. S. Tadepalli</a>, <a href="/search/nucl-ex?searchtype=author&query=Vandenbroucke%2C+M">M. Vandenbroucke</a> </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="2402.01904v1-abstract-short" style="display: inline;"> A new radial time projection chamber based on Gas Electron Multiplier amplification layers was developed for the BONuS12 experiment in Hall B at Jefferson Lab. This device represents a significant evolutionary development over similar devices constructed for previous experiments, including cylindrical amplification layers constructed from single continuous GEM foils with less than 1\% dead area. P… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.01904v1-abstract-full').style.display = 'inline'; document.getElementById('2402.01904v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.01904v1-abstract-full" style="display: none;"> A new radial time projection chamber based on Gas Electron Multiplier amplification layers was developed for the BONuS12 experiment in Hall B at Jefferson Lab. This device represents a significant evolutionary development over similar devices constructed for previous experiments, including cylindrical amplification layers constructed from single continuous GEM foils with less than 1\% dead area. Particular attention had been paid to producing excellent geometric uniformity of all electrodes, including the very thin metalized polyester film of the cylindrical cathode. This manuscript describes the design, construction, and performance of this new detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.01904v1-abstract-full').style.display = 'none'; document.getElementById('2402.01904v1-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> 2 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-24-4000 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl.Instrum.Meth.A 1062 (2024) 169190 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.07874">arXiv:2307.07874</a> <span> [<a href="https://arxiv.org/pdf/2307.07874">pdf</a>, <a href="https://arxiv.org/format/2307.07874">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"> Beam Spin Asymmetry Measurements of Deeply Virtual $蟺^0$ Production with CLAS12 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Kim%2C+A">A. Kim</a>, <a href="/search/nucl-ex?searchtype=author&query=Diehl%2C+S">S. Diehl</a>, <a href="/search/nucl-ex?searchtype=author&query=Joo%2C+K">K. Joo</a>, <a href="/search/nucl-ex?searchtype=author&query=Kubarovsky%2C+V">V. Kubarovsky</a>, <a href="/search/nucl-ex?searchtype=author&query=Achenbach%2C+P">P. Achenbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Alvarado%2C+J+S">J. S. Alvarado</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">Whitney R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Atac%2C+H">H. Atac</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Benkel%2C+B">B. Benkel</a>, <a href="/search/nucl-ex?searchtype=author&query=Bianconi%2C+A">A. Bianconi</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Bondi%2C+M">M. Bondi</a>, <a href="/search/nucl-ex?searchtype=author&query=Boss%C3%B9%2C+F">F. Boss霉</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Brinkmann%2C+K+T">K. T. Brinkmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a> , et al. (132 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="2307.07874v1-abstract-short" style="display: inline;"> The new experimental measurements of beam spin asymmetry were performed for the deeply virtual exclusive $蟺^0$ production in a wide kinematic region with the photon virtualities $Q^2$ up to 8 GeV$^2$ and the Bjorken scaling variable $x_B$ in the valence regime. The data were collected by the CEBAF Large Acceptance Spectrometer (CLAS12) at Jefferson Lab with longitudinally polarized 10.6 GeV electr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.07874v1-abstract-full').style.display = 'inline'; document.getElementById('2307.07874v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.07874v1-abstract-full" style="display: none;"> The new experimental measurements of beam spin asymmetry were performed for the deeply virtual exclusive $蟺^0$ production in a wide kinematic region with the photon virtualities $Q^2$ up to 8 GeV$^2$ and the Bjorken scaling variable $x_B$ in the valence regime. The data were collected by the CEBAF Large Acceptance Spectrometer (CLAS12) at Jefferson Lab with longitudinally polarized 10.6 GeV electrons scattered on an unpolarized liquid-hydrogen target. Sizable asymmetry values indicate a substantial contribution from transverse virtual photon amplitudes to the polarized structure functions.The interpretation of these measurements in terms of the Generalized Parton Distributions (GPDs) demonstrates their sensitivity to the chiral-odd GPD $\bar E_T$, which contains information on quark transverse spin densities in unpolarized and polarized nucleons and provides access to the proton's transverse anomalous magnetic moment. Additionally, the data were compared to a theoretical model based on a Regge formalism that was extended to the high photon virtualities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.07874v1-abstract-full').style.display = 'none'; document.getElementById('2307.07874v1-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 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2023. </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">arXiv admin note: substantial text overlap with arXiv:2210.14557</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.09048">arXiv:2210.09048</a> <span> [<a href="https://arxiv.org/pdf/2210.09048">pdf</a>, <a href="https://arxiv.org/format/2210.09048">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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 Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> ATHENA Detector Proposal -- A Totally Hermetic Electron Nucleus Apparatus proposed for IP6 at the Electron-Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=ATHENA+Collaboration"> ATHENA 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=Agrawal%2C+N">N. Agrawal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/nucl-ex?searchtype=author&query=Akers%2C+W">W. Akers</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+M">M. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Allen%2C+M+M">M. M. Allen</a>, <a href="/search/nucl-ex?searchtype=author&query=Ameli%2C+F">F. Ameli</a>, <a href="/search/nucl-ex?searchtype=author&query=Angerami%2C+A">A. Angerami</a>, <a href="/search/nucl-ex?searchtype=author&query=Antonioli%2C+P">P. Antonioli</a>, <a href="/search/nucl-ex?searchtype=author&query=Apadula%2C+N+J">N. J. Apadula</a>, <a href="/search/nucl-ex?searchtype=author&query=Aprahamian%2C+A">A. Aprahamian</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arratia%2C+M">M. Arratia</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J+R">J. R. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</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=Augsten%2C+K">K. Augsten</a>, <a href="/search/nucl-ex?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Baldanza%2C+C">C. Baldanza</a>, <a href="/search/nucl-ex?searchtype=author&query=Bansal%2C+M">M. Bansal</a>, <a href="/search/nucl-ex?searchtype=author&query=Barbosa%2C+F">F. Barbosa</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a> , et al. (415 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="2210.09048v1-abstract-short" style="display: inline;"> ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine tracking and momentum resolution, high performance electromagnetic and hadronic calorimetry, hadron identification over a wide kinematic range, and near-complete hermeticity. This article describes the detector design and its e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.09048v1-abstract-full').style.display = 'inline'; document.getElementById('2210.09048v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.09048v1-abstract-full" style="display: none;"> ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine tracking and momentum resolution, high performance electromagnetic and hadronic calorimetry, hadron identification over a wide kinematic range, and near-complete hermeticity. This article describes the detector design and its expected performance in the most relevant physics channels. It includes an evaluation of detector technology choices, the technical challenges to realizing the detector and the R&D required to meet those challenges. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.09048v1-abstract-full').style.display = 'none'; document.getElementById('2210.09048v1-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> 13 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 17 (2022) 10, P10019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.00496">arXiv:2209.00496</a> <span> [<a href="https://arxiv.org/pdf/2209.00496">pdf</a>, <a href="https://arxiv.org/format/2209.00496">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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"> CORE -- a COmpact detectoR for the EIC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=CORE+Collaboration"> CORE Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Alarcon%2C+R">R. Alarcon</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M">M. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Baturin%2C+V">V. Baturin</a>, <a href="/search/nucl-ex?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Bukhari%2C+M">M. Bukhari</a>, <a href="/search/nucl-ex?searchtype=author&query=Capobianco%2C+R">R. Capobianco</a>, <a href="/search/nucl-ex?searchtype=author&query=Christy%2C+E">E. Christy</a>, <a href="/search/nucl-ex?searchtype=author&query=Diehl%2C+S">S. Diehl</a>, <a href="/search/nucl-ex?searchtype=author&query=Dugger%2C+M">M. Dugger</a>, <a href="/search/nucl-ex?searchtype=author&query=Dupr%C3%A9%2C+R">R. Dupr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Dzhygadlo%2C+R">R. Dzhygadlo</a>, <a href="/search/nucl-ex?searchtype=author&query=Flood%2C+K">K. Flood</a>, <a href="/search/nucl-ex?searchtype=author&query=Gnanvo%2C+K">K. Gnanvo</a>, <a href="/search/nucl-ex?searchtype=author&query=Guo%2C+L">L. Guo</a>, <a href="/search/nucl-ex?searchtype=author&query=Hayward%2C+T">T. Hayward</a>, <a href="/search/nucl-ex?searchtype=author&query=Hattawy%2C+M">M. Hattawy</a>, <a href="/search/nucl-ex?searchtype=author&query=Hoballah%2C+M">M. Hoballah</a>, <a href="/search/nucl-ex?searchtype=author&query=Hohlmann%2C+M">M. Hohlmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Hyde%2C+C+E">C. E. Hyde</a>, <a href="/search/nucl-ex?searchtype=author&query=Ilieva%2C+Y">Y. Ilieva</a>, <a href="/search/nucl-ex?searchtype=author&query=Jacobs%2C+W+W">W. W. Jacobs</a>, <a href="/search/nucl-ex?searchtype=author&query=Joo%2C+K">K. Joo</a>, <a href="/search/nucl-ex?searchtype=author&query=Kalicy%2C+G">G. Kalicy</a> , et al. (34 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="2209.00496v1-abstract-short" style="display: inline;"> The COmpact detectoR for the Eic (CORE) Proposal was submitted to the EIC "Call for Collaboration Proposals for Detectors". CORE comprehensively covers the physics scope of the EIC Community White Paper and the National Academies of Science 2018 report. The design exploits advances in detector precision and granularity to minimize size. The central detector includes a 3Tesla, 2.5m solenoid. Tracki… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.00496v1-abstract-full').style.display = 'inline'; document.getElementById('2209.00496v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.00496v1-abstract-full" style="display: none;"> The COmpact detectoR for the Eic (CORE) Proposal was submitted to the EIC "Call for Collaboration Proposals for Detectors". CORE comprehensively covers the physics scope of the EIC Community White Paper and the National Academies of Science 2018 report. The design exploits advances in detector precision and granularity to minimize size. The central detector includes a 3Tesla, 2.5m solenoid. Tracking is primarily silicon. Electromagnetic calorimetry is based on the high performance crystals. Ring-imaging Cherenkov detectors provide hadronic particle identification. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.00496v1-abstract-full').style.display = 'none'; document.getElementById('2209.00496v1-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 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">Contact authors: C.E. Hyde, chyde@odu.edu and P. Nadel-Turonski, turonski@jlab.org</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.14575">arXiv:2208.14575</a> <span> [<a href="https://arxiv.org/pdf/2208.14575">pdf</a>, <a href="https://arxiv.org/format/2208.14575">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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.nima.2023.168238">10.1016/j.nima.2023.168238 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Detector Requirements and Simulation Results for the EIC Exclusive, Diffractive and Tagging Physics Program using the ECCE Detector Concept </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bylinkin%2C+A">A. Bylinkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Dean%2C+C+T">C. T. Dean</a>, <a href="/search/nucl-ex?searchtype=author&query=Fegan%2C+S">S. Fegan</a>, <a href="/search/nucl-ex?searchtype=author&query=Gangadharan%2C+D">D. Gangadharan</a>, <a href="/search/nucl-ex?searchtype=author&query=Gates%2C+K">K. Gates</a>, <a href="/search/nucl-ex?searchtype=author&query=Kay%2C+S+J+D">S. J. D. Kay</a>, <a href="/search/nucl-ex?searchtype=author&query=Korover%2C+I">I. Korover</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%2C+W+B">W. B. Li</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%2C+X">X. Li</a>, <a href="/search/nucl-ex?searchtype=author&query=Montgomery%2C+R">R. Montgomery</a>, <a href="/search/nucl-ex?searchtype=author&query=Nguyen%2C+D">D. Nguyen</a>, <a href="/search/nucl-ex?searchtype=author&query=Penman%2C+G">G. Penman</a>, <a href="/search/nucl-ex?searchtype=author&query=Pybus%2C+J+R">J. R. Pybus</a>, <a href="/search/nucl-ex?searchtype=author&query=Santiesteban%2C+N">N. Santiesteban</a>, <a href="/search/nucl-ex?searchtype=author&query=Trotta%2C+R">R. Trotta</a>, <a href="/search/nucl-ex?searchtype=author&query=Usman%2C+A">A. Usman</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M+D">M. D. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Frantz%2C+J">J. Frantz</a>, <a href="/search/nucl-ex?searchtype=author&query=Glazier%2C+D+I">D. I. Glazier</a>, <a href="/search/nucl-ex?searchtype=author&query=Higinbotham%2C+D+W">D. W. Higinbotham</a>, <a href="/search/nucl-ex?searchtype=author&query=Horn%2C+T">T. Horn</a>, <a href="/search/nucl-ex?searchtype=author&query=Huang%2C+J">J. Huang</a>, <a href="/search/nucl-ex?searchtype=author&query=Huber%2C+G">G. Huber</a>, <a href="/search/nucl-ex?searchtype=author&query=Reed%2C+R">R. Reed</a>, <a href="/search/nucl-ex?searchtype=author&query=Roche%2C+J">J. Roche</a> , et al. (258 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="2208.14575v2-abstract-short" style="display: inline;"> This article presents a collection of simulation studies using the ECCE detector concept in the context of the EIC's exclusive, diffractive, and tagging physics program, which aims to further explore the rich quark-gluon structure of nucleons and nuclei. To successfully execute the program, ECCE proposed to utilize the detecter system close to the beamline to ensure exclusivity and tag ion beam/fr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.14575v2-abstract-full').style.display = 'inline'; document.getElementById('2208.14575v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.14575v2-abstract-full" style="display: none;"> This article presents a collection of simulation studies using the ECCE detector concept in the context of the EIC's exclusive, diffractive, and tagging physics program, which aims to further explore the rich quark-gluon structure of nucleons and nuclei. To successfully execute the program, ECCE proposed to utilize the detecter system close to the beamline to ensure exclusivity and tag ion beam/fragments for a particular reaction of interest. Preliminary studies confirmed the proposed technology and design satisfy the requirements. The projected physics impact results are based on the projected detector performance from the simulation at 10 or 100 fb^-1 of integrated luminosity. Additionally, a few insights on the potential 2nd Interaction Region can (IR) were also documented which could serve as a guidepost for the future development of a second EIC detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.14575v2-abstract-full').style.display = 'none'; document.getElementById('2208.14575v2-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 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.05086">arXiv:2208.05086</a> <span> [<a href="https://arxiv.org/pdf/2208.05086">pdf</a>, <a href="https://arxiv.org/format/2208.05086">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/PhysRevLett.130.022501">10.1103/PhysRevLett.130.022501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First observation of correlations between spin and transverse momenta in back-to-back dihadron production at CLAS12 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Hayward%2C+T+B">T. B. Hayward</a>, <a href="/search/nucl-ex?searchtype=author&query=Kotzinian%2C+A">A. Kotzinian</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">W. R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Atac%2C+H">H. Atac</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Baashen%2C+L">L. Baashen</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bianconi%2C+A">A. Bianconi</a>, <a href="/search/nucl-ex?searchtype=author&query=Biondo%2C+L">L. Biondo</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Bondi%2C+M">M. Bondi</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Boss%C3%B9%2C+F">F. Boss霉</a>, <a href="/search/nucl-ex?searchtype=author&query=Brinkman%2C+K+T">K. T. Brinkman</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Bulumulla%2C+D">D. Bulumulla</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a> , et al. (131 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="2208.05086v1-abstract-short" style="display: inline;"> We report the first measurements of deep inelastic scattering spin-dependent azimuthal asymmetries in back-to-back dihadron electroproduction, where two hadrons are produced in opposite hemispheres along the z-axis in the center-of-mass frame, with the first hadron produced in the current-fragmentation region and the second in the target-fragmentation region. The data were taken with longitudinall… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.05086v1-abstract-full').style.display = 'inline'; document.getElementById('2208.05086v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.05086v1-abstract-full" style="display: none;"> We report the first measurements of deep inelastic scattering spin-dependent azimuthal asymmetries in back-to-back dihadron electroproduction, where two hadrons are produced in opposite hemispheres along the z-axis in the center-of-mass frame, with the first hadron produced in the current-fragmentation region and the second in the target-fragmentation region. The data were taken with longitudinally polarized electron beams of 10.2 and 10.6 GeV incident on an unpolarized liquid-hydrogen target using the CLAS12 spectrometer at Jefferson Lab. Observed non-zero $\sin螖蠁$ modulations in $ep \rightarrow e'p蟺^+X$ events, where $螖蠁$ is the difference of the azimuthal angles of the proton and pion in the virtual photon and target nucleon center-of-mass frame, indicate that correlations between the spin and transverse momenta of hadrons produced in the target- and current-fragmentation regions may be significant. The measured beam-spin asymmetries provide a first access in dihadron production to a previously unobserved leading-twist spin- and transverse-momentum-dependent fracture function. The fracture functions describe the hadronization of the target remnant after the hard scattering of a virtual photon off a quark in the target particle and provide a new avenue for studying nucleonic structure and hadronization. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.05086v1-abstract-full').style.display = 'none'; document.getElementById('2208.05086v1-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">7 pages, 6 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/2207.10632">arXiv:2207.10632</a> <span> [<a href="https://arxiv.org/pdf/2207.10632">pdf</a>, <a href="https://arxiv.org/format/2207.10632">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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 Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Open Heavy Flavor Studies for the ECCE Detector at the Electron Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Li%2C+X">X. Li</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=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+A">A. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Arsene%2C+I+C">I. C. Arsene</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Bae%2C+J">J. Bae</a>, <a href="/search/nucl-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M+D">M. D. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Berdnikov%2C+V">V. Berdnikov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bock%2C+F">F. Bock</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borysova%2C+M">M. Borysova</a>, <a href="/search/nucl-ex?searchtype=author&query=Brash%2C+E">E. Brash</a>, <a href="/search/nucl-ex?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+M">M. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Bukhari%2C+M+H+S">M. H. S. Bukhari</a>, <a href="/search/nucl-ex?searchtype=author&query=Bylinkin%2C+A">A. Bylinkin</a> , et al. (262 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="2207.10632v2-abstract-short" style="display: inline;"> The ECCE detector has been recommended as the selected reference detector for the future Electron-Ion Collider (EIC). A series of simulation studies have been carried out to validate the physics feasibility of the ECCE detector. In this paper, detailed studies of heavy flavor hadron and jet reconstruction and physics projections with the ECCE detector performance and different magnet options will… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10632v2-abstract-full').style.display = 'inline'; document.getElementById('2207.10632v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.10632v2-abstract-full" style="display: none;"> The ECCE detector has been recommended as the selected reference detector for the future Electron-Ion Collider (EIC). A series of simulation studies have been carried out to validate the physics feasibility of the ECCE detector. In this paper, detailed studies of heavy flavor hadron and jet reconstruction and physics projections with the ECCE detector performance and different magnet options will be presented. The ECCE detector has enabled precise EIC heavy flavor hadron and jet measurements with a broad kinematic coverage. These proposed heavy flavor measurements will help systematically study the hadronization process in vacuum and nuclear medium especially in the underexplored kinematic region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10632v2-abstract-full').style.display = 'none'; document.getElementById('2207.10632v2-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 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 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">Open heavy flavor studies with the EIC reference detector design by the ECCE consortium. 11 pages, 11 figures, to be submitted to the Nuclear Instruments and Methods A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LANL report number: LA-UR-22-27181 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.10356">arXiv:2207.10356</a> <span> [<a href="https://arxiv.org/pdf/2207.10356">pdf</a>, <a href="https://arxiv.org/format/2207.10356">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="Instrumentation and Detectors">physics.ins-det</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.nima.2022.167956">10.1016/j.nima.2022.167956 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exclusive J/$蠄$ Detection and Physics with ECCE </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Li%2C+X">X. Li</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=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+A">A. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Arsene%2C+I+C">I. C. Arsene</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Bae%2C+J">J. Bae</a>, <a href="/search/nucl-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M+D">M. D. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Berdnikov%2C+V">V. Berdnikov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bock%2C+F">F. Bock</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borysova%2C+M">M. Borysova</a>, <a href="/search/nucl-ex?searchtype=author&query=Brash%2C+E">E. Brash</a>, <a href="/search/nucl-ex?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+M">M. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Bukhari%2C+M+H+S">M. H. S. Bukhari</a>, <a href="/search/nucl-ex?searchtype=author&query=Bylinkin%2C+A">A. Bylinkin</a> , et al. (262 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="2207.10356v1-abstract-short" style="display: inline;"> Exclusive heavy quarkonium photoproduction is one of the most popular processes in EIC, which has a large cross section and a simple final state. Due to the gluonic nature of the exchange Pomeron, this process can be related to the gluon distributions in the nucleus. The momentum transfer dependence of this process is sensitive to the interaction sites, which provides a powerful tool to probe the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10356v1-abstract-full').style.display = 'inline'; document.getElementById('2207.10356v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.10356v1-abstract-full" style="display: none;"> Exclusive heavy quarkonium photoproduction is one of the most popular processes in EIC, which has a large cross section and a simple final state. Due to the gluonic nature of the exchange Pomeron, this process can be related to the gluon distributions in the nucleus. The momentum transfer dependence of this process is sensitive to the interaction sites, which provides a powerful tool to probe the spatial distribution of gluons in the nucleus. Recently the problem of the origin of hadron mass has received lots of attention in determining the anomaly contribution $M_{a}$. The trace anomaly is sensitive to the gluon condensate, and exclusive production of quarkonia such as J/$蠄$ and $违$ can serve as a sensitive probe to constrain it. In this paper, we present the performance of the ECCE detector for exclusive J/$蠄$ detection and the capability of this process to investigate the above physics opportunities with ECCE. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10356v1-abstract-full').style.display = 'none'; document.getElementById('2207.10356v1-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 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">11 pages, 14 figures, 1 table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.09437">arXiv:2207.09437</a> <span> [<a href="https://arxiv.org/pdf/2207.09437">pdf</a>, <a href="https://arxiv.org/format/2207.09437">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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 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.nima.2023.168464">10.1016/j.nima.2023.168464 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design and Simulated Performance of Calorimetry Systems for the ECCE Detector at the Electron Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bock%2C+F">F. Bock</a>, <a href="/search/nucl-ex?searchtype=author&query=Schmidt%2C+N">N. Schmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+P+K">P. K. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Santiesteban%2C+N">N. Santiesteban</a>, <a href="/search/nucl-ex?searchtype=author&query=Horn%2C+T">T. Horn</a>, <a href="/search/nucl-ex?searchtype=author&query=Huang%2C+J">J. Huang</a>, <a href="/search/nucl-ex?searchtype=author&query=Lajoie%2C+J">J. Lajoie</a>, <a href="/search/nucl-ex?searchtype=author&query=Camacho%2C+C+M">C. Munoz Camacho</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=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+A">A. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Arsene%2C+I+C">I. C. Arsene</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Bae%2C+J">J. Bae</a>, <a href="/search/nucl-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M+D">M. D. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Berdnikov%2C+V">V. Berdnikov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borysova%2C+M">M. Borysova</a>, <a href="/search/nucl-ex?searchtype=author&query=Brash%2C+E">E. Brash</a> , et al. (263 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="2207.09437v1-abstract-short" style="display: inline;"> We describe the design and performance the calorimeter systems used in the ECCE detector design to achieve the overall performance specifications cost-effectively with careful consideration of appropriate technical and schedule risks. The calorimeter systems consist of three electromagnetic calorimeters, covering the combined pseudorapdity range from -3.7 to 3.8 and two hadronic calorimeters. Key… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.09437v1-abstract-full').style.display = 'inline'; document.getElementById('2207.09437v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.09437v1-abstract-full" style="display: none;"> We describe the design and performance the calorimeter systems used in the ECCE detector design to achieve the overall performance specifications cost-effectively with careful consideration of appropriate technical and schedule risks. The calorimeter systems consist of three electromagnetic calorimeters, covering the combined pseudorapdity range from -3.7 to 3.8 and two hadronic calorimeters. Key calorimeter performances which include energy and position resolutions, reconstruction efficiency, and particle identification will be presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.09437v1-abstract-full').style.display = 'none'; document.getElementById('2207.09437v1-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> 19 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">19 pages, 22 figures, 5 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.09185">arXiv:2205.09185</a> <span> [<a href="https://arxiv.org/pdf/2205.09185">pdf</a>, <a href="https://arxiv.org/format/2205.09185">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</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 Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-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/10.1016/j.nima.2022.167748">10.1016/j.nima.2022.167748 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> AI-assisted Optimization of the ECCE Tracking System at the Electron Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Fanelli%2C+C">C. Fanelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Papandreou%2C+Z">Z. Papandreou</a>, <a href="/search/nucl-ex?searchtype=author&query=Suresh%2C+K">K. Suresh</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=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+A">A. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Arsene%2C+I+C">I. C. Arsene</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Bae%2C+J">J. Bae</a>, <a href="/search/nucl-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M+D">M. D. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Berdnikov%2C+V">V. Berdnikov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bock%2C+F">F. Bock</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borysova%2C+M">M. Borysova</a>, <a href="/search/nucl-ex?searchtype=author&query=Brash%2C+E">E. Brash</a>, <a href="/search/nucl-ex?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+M">M. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a> , et al. (258 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="2205.09185v2-abstract-short" style="display: inline;"> The Electron-Ion Collider (EIC) is a cutting-edge accelerator facility that will study the nature of the "glue" that binds the building blocks of the visible matter in the universe. The proposed experiment will be realized at Brookhaven National Laboratory in approximately 10 years from now, with detector design and R&D currently ongoing. Notably, EIC is one of the first large-scale facilities to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.09185v2-abstract-full').style.display = 'inline'; document.getElementById('2205.09185v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.09185v2-abstract-full" style="display: none;"> The Electron-Ion Collider (EIC) is a cutting-edge accelerator facility that will study the nature of the "glue" that binds the building blocks of the visible matter in the universe. The proposed experiment will be realized at Brookhaven National Laboratory in approximately 10 years from now, with detector design and R&D currently ongoing. Notably, EIC is one of the first large-scale facilities to leverage Artificial Intelligence (AI) already starting from the design and R&D phases. The EIC Comprehensive Chromodynamics Experiment (ECCE) is a consortium that proposed a detector design based on a 1.5T solenoid. The EIC detector proposal review concluded that the ECCE design will serve as the reference design for an EIC detector. Herein we describe a comprehensive optimization of the ECCE tracker using AI. The work required a complex parametrization of the simulated detector system. Our approach dealt with an optimization problem in a multidimensional design space driven by multiple objectives that encode the detector performance, while satisfying several mechanical constraints. We describe our strategy and show results obtained for the ECCE tracking system. The AI-assisted design is agnostic to the simulation framework and can be extended to other sub-detectors or to a system of sub-detectors to further optimize the performance of the EIC detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.09185v2-abstract-full').style.display = 'none'; document.getElementById('2205.09185v2-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> 19 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">16 pages, 18 figures, 2 appendices, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.08607">arXiv:2205.08607</a> <span> [<a href="https://arxiv.org/pdf/2205.08607">pdf</a>, <a href="https://arxiv.org/format/2205.08607">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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 Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-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/10.1016/j.nima.2022.167859">10.1016/j.nima.2022.167859 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Scientific Computing Plan for the ECCE Detector at the Electron Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Dean%2C+C+T">C. T. Dean</a>, <a href="/search/nucl-ex?searchtype=author&query=Fanelli%2C+C">C. Fanelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Huang%2C+J">J. Huang</a>, <a href="/search/nucl-ex?searchtype=author&query=Kauder%2C+K">K. Kauder</a>, <a href="/search/nucl-ex?searchtype=author&query=Lawrence%2C+D">D. Lawrence</a>, <a href="/search/nucl-ex?searchtype=author&query=Osborn%2C+J+D">J. D. Osborn</a>, <a href="/search/nucl-ex?searchtype=author&query=Paus%2C+C">C. Paus</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=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+A">A. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Arsene%2C+I+C">I. C. Arsene</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Bae%2C+J">J. Bae</a>, <a href="/search/nucl-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M+D">M. D. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bashkanov%2C+M">M. Bashkanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Berdnikov%2C+V">V. Berdnikov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bock%2C+F">F. Bock</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Borysova%2C+M">M. Borysova</a>, <a href="/search/nucl-ex?searchtype=author&query=Brash%2C+E">E. Brash</a> , et al. (256 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="2205.08607v1-abstract-short" style="display: inline;"> The Electron Ion Collider (EIC) is the next generation of precision QCD facility to be built at Brookhaven National Laboratory in conjunction with Thomas Jefferson National Laboratory. There are a significant number of software and computing challenges that need to be overcome at the EIC. During the EIC detector proposal development period, the ECCE consortium began identifying and addressing thes… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.08607v1-abstract-full').style.display = 'inline'; document.getElementById('2205.08607v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.08607v1-abstract-full" style="display: none;"> The Electron Ion Collider (EIC) is the next generation of precision QCD facility to be built at Brookhaven National Laboratory in conjunction with Thomas Jefferson National Laboratory. There are a significant number of software and computing challenges that need to be overcome at the EIC. During the EIC detector proposal development period, the ECCE consortium began identifying and addressing these challenges in the process of producing a complete detector proposal based upon detailed detector and physics simulations. In this document, the software and computing efforts to produce this proposal are discussed; furthermore, the computing and software model and resources required for the future of ECCE are described. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.08607v1-abstract-full').style.display = 'none'; document.getElementById('2205.08607v1-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 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> NIMA 1047, 167859 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.16785">arXiv:2203.16785</a> <span> [<a href="https://arxiv.org/pdf/2203.16785">pdf</a>, <a href="https://arxiv.org/format/2203.16785">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.107.015201">10.1103/PhysRevC.107.015201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exclusive $蟺^{-}$ Electroproduction off the Neutron in Deuterium in the Resonance Region </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Tian%2C+Y">Y. Tian</a>, <a href="/search/nucl-ex?searchtype=author&query=Gothe%2C+R+W">R. W. Gothe</a>, <a href="/search/nucl-ex?searchtype=author&query=Mokeev%2C+V+I">V. I. Mokeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Hollis%2C+G">G. Hollis</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">W. R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Atac%2C+H">H. Atac</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Benkel%2C+B">B. Benkel</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bianconi%2C+A">A. Bianconi</a>, <a href="/search/nucl-ex?searchtype=author&query=Biondo%2C+L">L. Biondo</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A">A. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boss%C3%B9%2C+F">F. Boss霉</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bond%C3%AC%2C+M">M. Bond矛</a>, <a href="/search/nucl-ex?searchtype=author&query=Brinkmann%2C+K+T">K. T. Brinkmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Bulumulla%2C+D">D. Bulumulla</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Capobianco%2C+R">R. Capobianco</a> , et al. (118 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="2203.16785v3-abstract-short" style="display: inline;"> New results for the exclusive and quasi-free cross sections off neutrons bound in deuterium $纬_vn(p) \rightarrow p蟺^{-} (p)$ are presented over a wide final state hadron angle range with a kinematic coverage of the invariant mass ($W$) up to 1.825 GeV and the virtual photon four-momentum transfer squared ($Q^{2}$) from 0.4 to 1.0 GeV$^2$. The exclusive structure functions were extracted and their… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.16785v3-abstract-full').style.display = 'inline'; document.getElementById('2203.16785v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.16785v3-abstract-full" style="display: none;"> New results for the exclusive and quasi-free cross sections off neutrons bound in deuterium $纬_vn(p) \rightarrow p蟺^{-} (p)$ are presented over a wide final state hadron angle range with a kinematic coverage of the invariant mass ($W$) up to 1.825 GeV and the virtual photon four-momentum transfer squared ($Q^{2}$) from 0.4 to 1.0 GeV$^2$. The exclusive structure functions were extracted and their Legendre moments were obtained. Final-state-interaction contributions have been kinematically separated from the extracted quasi-free cross sections off bound neutrons solely based on the analysis of the experimental data. These new results will serve as long-awaited input for phenomenological analyses to extract the $Q^{2}$ evolution of previously unavailable $n \to N^{*}$ electroexcitation amplitudes and to improve state-of-the-art models of neutrino scattering off nuclei by augmenting the already available results from free protons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.16785v3-abstract-full').style.display = 'none'; document.getElementById('2203.16785v3-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 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">The author list has been updated</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.03398">arXiv:2202.03398</a> <span> [<a href="https://arxiv.org/pdf/2202.03398">pdf</a>, <a href="https://arxiv.org/format/2202.03398">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.105.065201">10.1103/PhysRevC.105.065201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beam-Recoil Transferred Polarization in $K^+Y$ Electroproduction in the Nucleon Resonance Region with CLAS12 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Carman%2C+D+S">D. S. Carman</a>, <a href="/search/nucl-ex?searchtype=author&query=D%27Angelo%2C+A">A. D'Angelo</a>, <a href="/search/nucl-ex?searchtype=author&query=Lanza%2C+L">L. Lanza</a>, <a href="/search/nucl-ex?searchtype=author&query=Mokeev%2C+V+I">V. I. Mokeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">W. R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Atac%2C+H">H. Atac</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Benkel%2C+B">B. Benkel</a>, <a href="/search/nucl-ex?searchtype=author&query=Bianconi%2C+A">A. Bianconi</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Bondi%2C+M">M. Bondi</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bossu%2C+F">F. Bossu</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Bulumulla%2C+D">D. Bulumulla</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Capobianco%2C+R">R. Capobianco</a> , et al. (116 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="2202.03398v1-abstract-short" style="display: inline;"> Beam-recoil transferred polarizations for the exclusive electroproduction of $K^+螞$ and $K^+危^0$ final states from an unpolarized proton target have been measured using the CLAS12 spectrometer at Jefferson Laboratory. The measurements at beam energies of 6.535~GeV and 7.546~GeV span the range of four-momentum transfer $Q^2$ from 0.3 to 4.5~GeV$^2$ and invariant energy $W$ from 1.6 to 2.4~GeV, whil… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.03398v1-abstract-full').style.display = 'inline'; document.getElementById('2202.03398v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.03398v1-abstract-full" style="display: none;"> Beam-recoil transferred polarizations for the exclusive electroproduction of $K^+螞$ and $K^+危^0$ final states from an unpolarized proton target have been measured using the CLAS12 spectrometer at Jefferson Laboratory. The measurements at beam energies of 6.535~GeV and 7.546~GeV span the range of four-momentum transfer $Q^2$ from 0.3 to 4.5~GeV$^2$ and invariant energy $W$ from 1.6 to 2.4~GeV, while covering the full center-of-mass angular range of the $K^+$. These new data extend the existing hyperon polarization data from CLAS in a similar kinematic range but from a significantly larger dataset. They represent an important addition to the world data, allowing for better exploration of the reaction mechanism in strangeness production processes, for further understanding of the spectrum and structure of excited nucleon states, and for improved insight into the strong interaction in the regime of non-perturbative dynamics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.03398v1-abstract-full').style.display = 'none'; document.getElementById('2202.03398v1-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 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">25 pages, 22 figures, 4 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-22-3560 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.07419">arXiv:2102.07419</a> <span> [<a href="https://arxiv.org/pdf/2102.07419">pdf</a>, <a href="https://arxiv.org/format/2102.07419">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.104.025203">10.1103/PhysRevC.104.025203 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of deeply virtual Compton scattering off Helium-4 with CLAS at Jefferson Lab </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Dupr%C3%A9%2C+R">R. Dupr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Hattawy%2C+M">M. Hattawy</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Vita%2C+R">R. De Vita</a>, <a href="/search/nucl-ex?searchtype=author&query=Alaoui%2C+A+E">A. El Alaoui</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Egiyan%2C+H">H. Egiyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Girod%2C+F+X">F. X. Girod</a>, <a href="/search/nucl-ex?searchtype=author&query=Guidal%2C+M">M. Guidal</a>, <a href="/search/nucl-ex?searchtype=author&query=Hafidi%2C+K">K. Hafidi</a>, <a href="/search/nucl-ex?searchtype=author&query=Jenkins%2C+D">D. Jenkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Liuti%2C+S">S. Liuti</a>, <a href="/search/nucl-ex?searchtype=author&query=Perrin%2C+Y">Y. Perrin</a>, <a href="/search/nucl-ex?searchtype=author&query=Stepanyan%2C+S">S. Stepanyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Torayev%2C+B">B. Torayev</a>, <a href="/search/nucl-ex?searchtype=author&query=Voutier%2C+E">E. Voutier</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">W. R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Atac%2C+H">H. Atac</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a> , et al. (116 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="2102.07419v2-abstract-short" style="display: inline;"> We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off $^4$He using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 6 GeV longitudinally polarized electron beam incident on a pressurized $^4$He gaseous target. We detail the method used to ensure the exclusivity of the measured reactions, in particular the upgrade of CLAS with a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.07419v2-abstract-full').style.display = 'inline'; document.getElementById('2102.07419v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.07419v2-abstract-full" style="display: none;"> We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off $^4$He using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 6 GeV longitudinally polarized electron beam incident on a pressurized $^4$He gaseous target. We detail the method used to ensure the exclusivity of the measured reactions, in particular the upgrade of CLAS with a radial time projection chamber to detect the low-energy recoiling $^4$He nuclei and an inner calorimeter to extend the photon detection acceptance at forward angles. Our results confirm the theoretically predicted enhancement of the coherent ($e^4$He$~\to~e'$$^4$He$'纬'$) beam spin asymmetries compared to those observed on the free proton, while the incoherent ($e^4$He$~\to~e'$p$'纬'$X$'$) asymmetries exhibit a 30$\%$ suppression. From the coherent data, we were able to extract, in a model-independent way, the real and imaginary parts of the only $^4$He Compton form factor, $\cal H_A$, leading the way toward 3D imaging of the partonic structure of nuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.07419v2-abstract-full').style.display = 'none'; document.getElementById('2102.07419v2-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 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 104, 025203 (2021) </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/1908.00949">arXiv:1908.00949</a> <span> [<a href="https://arxiv.org/pdf/1908.00949">pdf</a>, <a href="https://arxiv.org/format/1908.00949">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"> Neutron DVCS Measurements with BONuS12 in CLAS12 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Hattawy%2C+M">M. Hattawy</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Dodge%2C+G">G. Dodge</a>, <a href="/search/nucl-ex?searchtype=author&query=Dzbenski%2C+N">N. Dzbenski</a>, <a href="/search/nucl-ex?searchtype=author&query=Hyde%2C+C">C. Hyde</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S">S. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Payette%2C+D">D. Payette</a>, <a href="/search/nucl-ex?searchtype=author&query=Poudel%2C+J">J. Poudel</a>, <a href="/search/nucl-ex?searchtype=author&query=Weinstein%2C+L">L. Weinstein</a>, <a href="/search/nucl-ex?searchtype=author&query=Dupr%C3%A9%2C+R">R. Dupr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Guidal%2C+M">M. Guidal</a>, <a href="/search/nucl-ex?searchtype=author&query=Marchand%2C+D">D. Marchand</a>, <a href="/search/nucl-ex?searchtype=author&query=Mu%C3%B1oz%2C+C">C. Mu帽oz</a>, <a href="/search/nucl-ex?searchtype=author&query=Niccolai%2C+S">S. Niccolai</a>, <a href="/search/nucl-ex?searchtype=author&query=Voutier%2C+E">E. Voutier</a>, <a href="/search/nucl-ex?searchtype=author&query=Hafidi%2C+K">K. Hafidi</a>, <a href="/search/nucl-ex?searchtype=author&query=Yi%2C+Z">Z. Yi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chetry%2C+T">T. Chetry</a>, <a href="/search/nucl-ex?searchtype=author&query=El-Fassi%2C+L">L. El-Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N">N. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Gavalian%2C+G">G. Gavalian</a>, <a href="/search/nucl-ex?searchtype=author&query=Girod%2C+F+X">F. X. Girod</a>, <a href="/search/nucl-ex?searchtype=author&query=Stepanyan%2C+S">S. Stepanyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Albayrak%2C+I">I. Albayrak</a> , et al. (5 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="1908.00949v1-abstract-short" style="display: inline;"> The three-dimensional picture of quarks and gluons in the nucleon is set to be revealed through deeply virtual Compton scattering (DVCS). With the absence of a free neutron target, the deuterium target represents the simplest nucleus to be used to probe the internal 3D partonic structure of the neutron. We propose here to measure the beam spin asymmetry (BSA) in incoherent neutron DVCS together wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.00949v1-abstract-full').style.display = 'inline'; document.getElementById('1908.00949v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.00949v1-abstract-full" style="display: none;"> The three-dimensional picture of quarks and gluons in the nucleon is set to be revealed through deeply virtual Compton scattering (DVCS). With the absence of a free neutron target, the deuterium target represents the simplest nucleus to be used to probe the internal 3D partonic structure of the neutron. We propose here to measure the beam spin asymmetry (BSA) in incoherent neutron DVCS together with the approved E12-06-113 experiment (BONuS12) within the run group F, using the same beam time, simply with addition of beam polarization. The DVCS BSA on the quasi-free neutron will be measured in a wide range of kinematics by tagging the scattered electron and the real photon final state with the spectator proton. We will also measure BSA with all final state particles detected including the struck neutron. The proposed measurements is complementary to the approved CLAS12 experiment E12-11-003, which will also measure the quasi-free neutron DVCS by detecting the scattered neutron, but not the spectator proton. Indeed, besides providing more data for neutron DVCS, this experiment will allow a comparison of the measurement of the BSA of neutron DVCS from the approved E12-11-003 with the measurements using the two methods proposed herein. This comparison will help to understand the impact of nuclear effects, such as the final state interactions (FSI) and Fermi motion on the measurement of the neutron DVCS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.00949v1-abstract-full').style.display = 'none'; document.getElementById('1908.00949v1-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> 2 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1901.09994">arXiv:1901.09994</a> <span> [<a href="https://arxiv.org/pdf/1901.09994">pdf</a>, <a href="https://arxiv.org/ps/1901.09994">ps</a>, <a href="https://arxiv.org/format/1901.09994">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> </div> </div> <p class="title is-5 mathjax"> Probing nucleon's spin structures with polarized Drell-Yan in the Fermilab SpinQuest experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+A">Andrew Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Peng%2C+J+C">J. C. Peng</a>, <a href="/search/nucl-ex?searchtype=author&query=Leung%2C+H">H. Leung</a>, <a href="/search/nucl-ex?searchtype=author&query=Tian%2C+M">M. Tian</a>, <a href="/search/nucl-ex?searchtype=author&query=Makins%2C+N">N. Makins</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+M">M. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Klein%2C+A">A. Klein</a>, <a href="/search/nucl-ex?searchtype=author&query=Kleinjan%2C+D">D. Kleinjan</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+K">K. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=McCumber%2C+M">M. McCumber</a>, <a href="/search/nucl-ex?searchtype=author&query=McGaughey%2C+P">P. McGaughey</a>, <a href="/search/nucl-ex?searchtype=author&query=Miraal-Martinez%2C+J">J. Miraal-Martinez</a>, <a href="/search/nucl-ex?searchtype=author&query=Da+Silva%2C+C">C. Da Silva</a>, <a href="/search/nucl-ex?searchtype=author&query=Uemura%2C+S">Sho Uemura</a>, <a href="/search/nucl-ex?searchtype=author&query=Jen%2C+M">M. Jen</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%2C+X">X. Li</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Geesaman%2C+D">D. Geesaman</a>, <a href="/search/nucl-ex?searchtype=author&query=Reimer%2C+P+E">P. E. Reimer</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+C">C. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Tesarek%2C+R+J">R. J. Tesarek</a>, <a href="/search/nucl-ex?searchtype=author&query=Sawada%2C+S">S. Sawada</a>, <a href="/search/nucl-ex?searchtype=author&query=Lorenzon%2C+W">W. Lorenzon</a>, <a href="/search/nucl-ex?searchtype=author&query=Raymond%2C+R">R. Raymond</a>, <a href="/search/nucl-ex?searchtype=author&query=Slifer%2C+K">K. Slifer</a> , et al. (29 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="1901.09994v2-abstract-short" style="display: inline;"> Although the proton was discovered about 100 years ago, its spin structure still remains a mystery. Recent studies suggest that the orbital angular momentum of sea quarks could significantly contribute to the proton's spin. The SeaQuest experiment, which recently completed data collection, probed the unpolarized light quark sea distributions of the proton using the Drell-Yan process. Its successor… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.09994v2-abstract-full').style.display = 'inline'; document.getElementById('1901.09994v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1901.09994v2-abstract-full" style="display: none;"> Although the proton was discovered about 100 years ago, its spin structure still remains a mystery. Recent studies suggest that the orbital angular momentum of sea quarks could significantly contribute to the proton's spin. The SeaQuest experiment, which recently completed data collection, probed the unpolarized light quark sea distributions of the proton using the Drell-Yan process. Its successor, the SpinQuest (E1039), will access the $\bar{u}$ and $\bar{d}$ Sivers functions using polarized NH$_3$ and ND$_3$ targets. A non-zero Sivers asymmetry, observed in SpinQuest, would be a strong indication of non-zero sea-quark orbital angular momentum. The SpinQuest experiment can also probe the sea quark's transversity distribution, which is relevant for the determination of proton's tensor charge. Recent study suggests that sea-quarks might contribute significantly to deuteron's tensor polarized structure functions. This can be further probed in SpinQuest using tensor polarized ND$_3$ target. The current status and future plan of the experiment are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.09994v2-abstract-full').style.display = 'none'; document.getElementById('1901.09994v2-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 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.07628">arXiv:1812.07628</a> <span> [<a href="https://arxiv.org/pdf/1812.07628">pdf</a>, <a href="https://arxiv.org/format/1812.07628">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.123.032502">10.1103/PhysRevLett.123.032502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exploring the Structure of the Bound Proton with Deeply Virtual Compton Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Hattawy%2C+M">M. Hattawy</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Dupr%C3%A9%2C+R">R. Dupr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Vita%2C+R">R. De Vita</a>, <a href="/search/nucl-ex?searchtype=author&query=Alaoui%2C+A+E">A. El Alaoui</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Egiyan%2C+H">H. Egiyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Girod%2C+F+X">F. X. Girod</a>, <a href="/search/nucl-ex?searchtype=author&query=Guidal%2C+M">M. Guidal</a>, <a href="/search/nucl-ex?searchtype=author&query=Hafidi%2C+K">K. Hafidi</a>, <a href="/search/nucl-ex?searchtype=author&query=Jenkins%2C+D">D. Jenkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Liuti%2C+S">S. Liuti</a>, <a href="/search/nucl-ex?searchtype=author&query=Perrin%2C+Y">Y. Perrin</a>, <a href="/search/nucl-ex?searchtype=author&query=Stepanyan%2C+S">S. Stepanyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Torayev%2C+B">B. Torayev</a>, <a href="/search/nucl-ex?searchtype=author&query=Voutier%2C+E">E. Voutier</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+S">S. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Angelini%2C+G">Giovanni Angelini</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boss%C3%B9%2C+F">F. Boss霉</a> , et al. (103 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="1812.07628v2-abstract-short" style="display: inline;"> In the past two decades, deeply virtual Compton scattering of electrons has been successfully used to advance our knowledge of the partonic structure of the free proton and investigate correlations between the transverse position and the longitudinal momentum of quarks inside the nucleon. Meanwhile, the structure of bound nucleons in nuclei has been studied in inclusive deep-inelastic lepton scatt… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.07628v2-abstract-full').style.display = 'inline'; document.getElementById('1812.07628v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.07628v2-abstract-full" style="display: none;"> In the past two decades, deeply virtual Compton scattering of electrons has been successfully used to advance our knowledge of the partonic structure of the free proton and investigate correlations between the transverse position and the longitudinal momentum of quarks inside the nucleon. Meanwhile, the structure of bound nucleons in nuclei has been studied in inclusive deep-inelastic lepton scattering experiments off nuclear targets, showing a significant difference in longitudinal momentum distribution of quarks inside the bound nucleon, known as the EMC effect. In this work, we report the first beam spin asymmetry (BSA) measurement of exclusive deeply virtual Compton scattering (DVCS) off a proton bound in $^4$He. The data used here were accumulated using a $6$ GeV longitudinally polarized electron beam incident on a pressurized $^4$He gaseous target placed within the CLAS spectrometer in Hall-B at the Thomas Jefferson National Accelerator Facility. The azimuthal angle ($蠁$) dependence of the BSA was studied in a wide range of virtual photon and scattered proton kinematics. The $Q^2$, $x_B$, and t dependencies of the BSA on the bound proton are compared with those on the free proton. In the whole kinematical region of our measurements, the BSA on the bound proton is smaller by 20\% to 40\%, indicating possible medium modification of its partonic structure. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.07628v2-abstract-full').style.display = 'none'; document.getElementById('1812.07628v2-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 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 123, 032502 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1712.10314">arXiv:1712.10314</a> <span> [<a href="https://arxiv.org/pdf/1712.10314">pdf</a>, <a href="https://arxiv.org/format/1712.10314">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="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> <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.98.015207">10.1103/PhysRevC.98.015207 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exclusive photoproduction of $蟺^0$ up to large values of Mandelstam variables $s, t$ and $u$ with CLAS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Kunkel%2C+M+C">M. C. Kunkel</a>, <a href="/search/nucl-ex?searchtype=author&query=32"> 32</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+1+M+J">18 M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=32"> 32</a>, <a href="/search/nucl-ex?searchtype=author&query=Strakovsky%2C+I+I">I. I. Strakovsky</a>, <a href="/search/nucl-ex?searchtype=author&query=Ritman%2C+1+J">16 J. Ritman</a>, <a href="/search/nucl-ex?searchtype=author&query=3"> 3</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldstein%2C+1+G+R">18 G. R. Goldstein</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+4+K+P">43 K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+2+S">28 S Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+1+H">13 H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+3+J">39 J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Balossino%2C+7+I">7 I. Balossino</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+1+L">19 L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+1+M">19 M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+2+V">21 V. Batourine</a>, <a href="/search/nucl-ex?searchtype=author&query=39"> 39</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+2+I">27 I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+2+A+S">25 A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=11"> 11</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+5+S">5 S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+3+W+J">39 W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+1+W+K">16 W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=40"> 40</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+3+S">39 S. Bueltmann</a> , et al. (147 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="1712.10314v1-abstract-short" style="display: inline;"> Exclusive photoproduction cross sections have been measured for the process $纬p \rightarrow p蟺^0(e^+e^-(纬))$ with the Dalitz decay final state using tagged photon energies in the range of $E_纬 = 1.275-5.425$ GeV. The complete angular distribution of the final state $蟺^0$, for the entire photon energy range up to large values of $t$ and $u$, has been measured for the first time. The data obtained s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.10314v1-abstract-full').style.display = 'inline'; document.getElementById('1712.10314v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1712.10314v1-abstract-full" style="display: none;"> Exclusive photoproduction cross sections have been measured for the process $纬p \rightarrow p蟺^0(e^+e^-(纬))$ with the Dalitz decay final state using tagged photon energies in the range of $E_纬 = 1.275-5.425$ GeV. The complete angular distribution of the final state $蟺^0$, for the entire photon energy range up to large values of $t$ and $u$, has been measured for the first time. The data obtained show that the cross section $d蟽/dt$, at mid to large angles, decreases with energy as $s^{-6.89\pm 0.26} $. This is in agreement with the perturbative QCD quark counting rule prediction of $s^{-7} $. Paradoxically, the size of angular distribution of measured cross sections is greatly underestimated by the QCD based Generalized Parton Distribution mechanism at highest available invariant energy $s=11$ GeV$^2$. At the same time, the Regge exchange based models for $蟺^0$ photoproduction are more consistent with experimental data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.10314v1-abstract-full').style.display = 'none'; document.getElementById('1712.10314v1-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 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2017. </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, 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 98, 015207 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1711.01974">arXiv:1711.01974</a> <span> [<a href="https://arxiv.org/pdf/1711.01974">pdf</a>, <a href="https://arxiv.org/format/1711.01974">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.120.062501">10.1103/PhysRevLett.120.062501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Q^2 Dependence of the Deuteron Spin Structure Function g_1 and its Moments at Low Q^2 with CLAS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Kang%2C+H">H. Kang</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S+E">S. E. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Ripani%2C+M">M. Ripani</a>, <a href="/search/nucl-ex?searchtype=author&query=Slifer%2C+K">K. Slifer</a>, <a href="/search/nucl-ex?searchtype=author&query=Zheng%2C+X">X. Zheng</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+S">S. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Balossino%2C+I">I. Balossino</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brock%2C+J">J. Brock</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Cao%2C+F+T">F. Thanh Cao</a>, <a href="/search/nucl-ex?searchtype=author&query=Carlin%2C+C">C. Carlin</a> , et al. (123 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="1711.01974v4-abstract-short" style="display: inline;"> We measured the $g_1$ spin structure function of the deuteron at low $Q^{2}$, where QCD can be approximated with chiral perturbation theory ($蠂$PT). The data cover the resonance region, up to an invariant mass of $W\approx1.9$~GeV. The generalized Gerasimov-Drell-Hearn sum, the moment $\bar螕_{1}^{d}$ and the integral $\bar{I}_纬^d$ related to the spin polarizability $纬_{0}^{d}$ are precisely determ… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.01974v4-abstract-full').style.display = 'inline'; document.getElementById('1711.01974v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1711.01974v4-abstract-full" style="display: none;"> We measured the $g_1$ spin structure function of the deuteron at low $Q^{2}$, where QCD can be approximated with chiral perturbation theory ($蠂$PT). The data cover the resonance region, up to an invariant mass of $W\approx1.9$~GeV. The generalized Gerasimov-Drell-Hearn sum, the moment $\bar螕_{1}^{d}$ and the integral $\bar{I}_纬^d$ related to the spin polarizability $纬_{0}^{d}$ are precisely determined down to a minimum $Q^2$ of 0.02~GeV$^2$ for the first time, about 2.5 times lower than that of previous data. We compare them to several $蠂$PT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the $蠂$PT domain. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.01974v4-abstract-full').style.display = 'none'; document.getElementById('1711.01974v4-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 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2017. </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">Version 1: version published in Phys. Rev. Lett. 6 pages, 3 figures. Supplementary material: data table for g1d and its moments (10 pages) V2: Figures labels changed and text slightly modified to clarify the exact nature of the measured moments V3: Corrected a typo page 5 for the theoretical value expected for deuteron GDH sum rule (agreement between measurement and expectation is improved)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-17-2585 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 120, 062501 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.10054">arXiv:1709.10054</a> <span> [<a href="https://arxiv.org/pdf/1709.10054">pdf</a>, <a href="https://arxiv.org/ps/1709.10054">ps</a>, <a href="https://arxiv.org/format/1709.10054">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 - 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/10.1016/j.physletb.2018.06.014">10.1016/j.physletb.2018.06.014 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Semi-Inclusive $蟺_0$ target and beam-target asymmetries from 6 GeV electron scattering with CLAS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Jawalkar%2C+S">S. Jawalkar</a>, <a href="/search/nucl-ex?searchtype=author&query=Koirala%2C+S">S. Koirala</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Griffioen%2C+K+A">K. A. Griffioen</a>, <a href="/search/nucl-ex?searchtype=author&query=Keith%2C+C">C. Keith</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S+E">S. E. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+S">S. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+V">V. Batourine</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brock%2C+J">J. Brock</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Bultmann%2C+S">S. Bultmann</a> , et al. (139 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="1709.10054v2-abstract-short" style="display: inline;"> We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic $^{14}$NH$_3$ target, and extracted double and single target spin asym… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.10054v2-abstract-full').style.display = 'inline'; document.getElementById('1709.10054v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.10054v2-abstract-full" style="display: none;"> We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic $^{14}$NH$_3$ target, and extracted double and single target spin asymmetries for $ep\rightarrow e^\prime蟺^0X$ in multidimensional bins in four-momentum transfer ($1.0<Q^2<3.2$ GeV$^2$), Bjorken-$x$ ($0.12<x<0.48$), hadron energy fraction ($0.4<z<0.7$), transverse pion momentum ($0<P_T<1.0$ GeV), and azimuthal angle $蠁_h$ between the lepton scattering and hadron production planes. We extracted asymmetries as a function of both $x$ and $P_T$, which provide access to transverse-momentum distributions of longitudinally polarized quarks. The double spin asymmetries depend weakly on $P_T$. The $\sin 2蠁_h$ moments are zero within uncertainties, which is consistent with the expected suppression of the Collins fragmentation function. The observed $\sin蠁_h$ moments suggest that quark gluon correlations are significant at large $x$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.10054v2-abstract-full').style.display = 'none'; document.getElementById('1709.10054v2-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 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </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 preprint pages, 3 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/1707.03361">arXiv:1707.03361</a> <span> [<a href="https://arxiv.org/pdf/1707.03361">pdf</a>, <a href="https://arxiv.org/format/1707.03361">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.119.202004">10.1103/PhysRevLett.119.202004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First Exclusive Measurement of Deeply Virtual Compton Scattering off $^4$He: Toward the 3D Tomography of Nuclei </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Hattawy%2C+M">M. Hattawy</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Dupr%C3%A9%2C+R">R. Dupr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Hafidi%2C+K">K. Hafidi</a>, <a href="/search/nucl-ex?searchtype=author&query=Stepanyan%2C+S">S. Stepanyan</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Vita%2C+R">R. De Vita</a>, <a href="/search/nucl-ex?searchtype=author&query=Alaoui%2C+A+E">A. El Alaoui</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Egiyan%2C+H">H. Egiyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Girod%2C+F+X">F. X. Girod</a>, <a href="/search/nucl-ex?searchtype=author&query=Guidal%2C+M">M. Guidal</a>, <a href="/search/nucl-ex?searchtype=author&query=Jenkins%2C+D">D. Jenkins</a>, <a href="/search/nucl-ex?searchtype=author&query=Liuti%2C+S">S. Liuti</a>, <a href="/search/nucl-ex?searchtype=author&query=Perrin%2C+Y">Y. Perrin</a>, <a href="/search/nucl-ex?searchtype=author&query=Torayev%2C+B">B. Torayev</a>, <a href="/search/nucl-ex?searchtype=author&query=Voutier%2C+E">E. Voutier</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+S">S. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">Whitney R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a> , et al. (135 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="1707.03361v1-abstract-short" style="display: inline;"> We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment used the 6 GeV electron beam from the CEBAF accelerator at Jefferson Lab incident on a pressurized $^4$He gaseous target placed in front of the CEBAF Large Acceptance Spectrometer (CLAS). The scattered electron was detected by CLAS and t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.03361v1-abstract-full').style.display = 'inline'; document.getElementById('1707.03361v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.03361v1-abstract-full" style="display: none;"> We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment used the 6 GeV electron beam from the CEBAF accelerator at Jefferson Lab incident on a pressurized $^4$He gaseous target placed in front of the CEBAF Large Acceptance Spectrometer (CLAS). The scattered electron was detected by CLAS and the photon by a dedicated electromagnetic calorimeter at forward angles. To ensure the exclusivity of the process, a specially designed radial time projection chamber was used to detect the recoiling $^4$He nuclei. We measured beam-spin asymmetries larger than those observed on the free proton in the same kinematic domain. From these, we were able to extract, in a model-independent way, the real and imaginary parts of the only $^4$He Compton form factor, $\cal H_A$. This first measurement of coherent deeply virtual Compton scattering on the $^4$He nucleus, with a fully exclusive final state via nuclear recoil tagging, leads the way toward 3D imaging of the partonic structure of nuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.03361v1-abstract-full').style.display = 'none'; document.getElementById('1707.03361v1-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 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 119, 202004 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1706.10160">arXiv:1706.10160</a> <span> [<a href="https://arxiv.org/pdf/1706.10160">pdf</a>, <a href="https://arxiv.org/format/1706.10160">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</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 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.nima.2018.04.052">10.1016/j.nima.2018.04.052 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Radial Time Projection Chamber for $伪$ detection in CLAS at JLab </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Dupr%C3%A9%2C+R">R. Dupr茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Stepanyan%2C+S">S. Stepanyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Hattawy%2C+M">M. Hattawy</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N">N. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Hafidi%2C+K">K. Hafidi</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bueltmann%2C+S">S. Bueltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Celentano%2C+A">A. Celentano</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Vita%2C+R">R. De Vita</a>, <a href="/search/nucl-ex?searchtype=author&query=Alaoui%2C+A+E">A. El Alaoui</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Fenker%2C+H">H. Fenker</a>, <a href="/search/nucl-ex?searchtype=author&query=Kosheleva%2C+K">K. Kosheleva</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S">S. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Musico%2C+P">P. Musico</a>, <a href="/search/nucl-ex?searchtype=author&query=Minutoli%2C+S">S. Minutoli</a>, <a href="/search/nucl-ex?searchtype=author&query=Oliver%2C+M">M. Oliver</a>, <a href="/search/nucl-ex?searchtype=author&query=Perrin%2C+Y">Y. Perrin</a>, <a href="/search/nucl-ex?searchtype=author&query=Torayev%2C+B">B. Torayev</a>, <a href="/search/nucl-ex?searchtype=author&query=Voutier%2C+E">E. Voutier</a> </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="1706.10160v3-abstract-short" style="display: inline;"> A new Radial Time Projection Chamber (RTPC) was developed at the Jefferson Laboratory to track low-energy nuclear recoils for the purpose of measuring exclusive nuclear reactions, such as coherent Deeply Virtual Compton Scattering and coherent meson production off $^4$He. In such processes, the $^4$He nucleus remains intact in the final state, however the CEBAF Large Acceptance Spectrometer (CLAS)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.10160v3-abstract-full').style.display = 'inline'; document.getElementById('1706.10160v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1706.10160v3-abstract-full" style="display: none;"> A new Radial Time Projection Chamber (RTPC) was developed at the Jefferson Laboratory to track low-energy nuclear recoils for the purpose of measuring exclusive nuclear reactions, such as coherent Deeply Virtual Compton Scattering and coherent meson production off $^4$He. In such processes, the $^4$He nucleus remains intact in the final state, however the CEBAF Large Acceptance Spectrometer (CLAS) cannot track the low energy $伪$ particles. In 2009, we carried out measurements using the CLAS spectrometer supplemented by the RTPC positioned directly around a gaseous $^4$He target, allowing a detection threshold as low as 12$\sim$MeV for $^4$He. This article discusses the design, principle of operation, calibration methods and the performances of this RTPC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.10160v3-abstract-full').style.display = 'none'; document.getElementById('1706.10160v3-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 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 June, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2017. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1611.04987">arXiv:1611.04987</a> <span> [<a href="https://arxiv.org/pdf/1611.04987">pdf</a>, <a href="https://arxiv.org/ps/1611.04987">ps</a>, <a href="https://arxiv.org/format/1611.04987">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.95.035207">10.1103/PhysRevC.95.035207 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Target and beam-target spin asymmetries in exclusive pion electroproduction for $Q^2>1$ GeV$^2$. II. $e p \rightarrow e 蟺^0 p$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P+E">P. E. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Kim%2C+A">A. Kim</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Badui%2C+R+A">R. A. Badui</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Balossino%2C+I">I. Balossino</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Cao%2C+T">T. Cao</a>, <a href="/search/nucl-ex?searchtype=author&query=Carman%2C+D+S">D. S. Carman</a>, <a href="/search/nucl-ex?searchtype=author&query=Celentano%2C+A">A. Celentano</a>, <a href="/search/nucl-ex?searchtype=author&query=Chandavar%2C+S">S. Chandavar</a>, <a href="/search/nucl-ex?searchtype=author&query=Charles%2C+G">G. Charles</a>, <a href="/search/nucl-ex?searchtype=author&query=Chetry%2C+T">T. Chetry</a> , et al. (131 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="1611.04987v1-abstract-short" style="display: inline;"> Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive $蟺^0$ electroproduction reaction $纬^* p \to p 蟺^0$, expanding an analysis of the $纬^* p \to n 蟺^+$ reaction from the same experiment. The results were obtained from scattering of 6 GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.04987v1-abstract-full').style.display = 'inline'; document.getElementById('1611.04987v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1611.04987v1-abstract-full" style="display: none;"> Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive $蟺^0$ electroproduction reaction $纬^* p \to p 蟺^0$, expanding an analysis of the $纬^* p \to n 蟺^+$ reaction from the same experiment. The results were obtained from scattering of 6 GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Lab. The kinematic range covered is $1.1<W<3$ GeV and $1<Q^2<6$ GeV$^2$. Results were obtained for about 5700 bins in $W$, $Q^2$, \cthcm, and $蠁^*$. The beam-target asymmetries were found to generally be greater than zero, with relatively modest \phicmsp dependence. The target asymmetries exhibit very strong \phicmsp dependence, with a change in sign occurring between results at low $W$ and high $W$, in contrast to $蟺^+$ electroproduction. Reasonable agreement is found with phenomenological fits to previous data for $W<1.6$ GeV, but significant differences are seen at higher $W$. When combined with cross section measurements, as well as $蟺^+$ observables, the present results will provide powerful constraints on nucleon resonance amplitudes at moderate and large values of $Q^2$, for resonances with masses as high as 2.4 GeV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.04987v1-abstract-full').style.display = 'none'; document.getElementById('1611.04987v1-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 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2016. </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">28 pages, 12 figures, 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 95, 035207 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.08632">arXiv:1608.08632</a> <span> [<a href="https://arxiv.org/pdf/1608.08632">pdf</a>, <a href="https://arxiv.org/format/1608.08632">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="Cosmology and Nongalactic Astrophysics">astro-ph.CO</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 Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Dark Sectors 2016 Workshop: Community Report </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Alexander%2C+J">Jim Alexander</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">Marco Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Echenard%2C+B">Bertrand Echenard</a>, <a href="/search/nucl-ex?searchtype=author&query=Essig%2C+R">Rouven Essig</a>, <a href="/search/nucl-ex?searchtype=author&query=Graham%2C+M">Matthew Graham</a>, <a href="/search/nucl-ex?searchtype=author&query=Izaguirre%2C+E">Eder Izaguirre</a>, <a href="/search/nucl-ex?searchtype=author&query=Jaros%2C+J">John Jaros</a>, <a href="/search/nucl-ex?searchtype=author&query=Krnjaic%2C+G">Gordan Krnjaic</a>, <a href="/search/nucl-ex?searchtype=author&query=Mardon%2C+J">Jeremy Mardon</a>, <a href="/search/nucl-ex?searchtype=author&query=Morrissey%2C+D">David Morrissey</a>, <a href="/search/nucl-ex?searchtype=author&query=Nelson%2C+T">Tim Nelson</a>, <a href="/search/nucl-ex?searchtype=author&query=Perelstein%2C+M">Maxim Perelstein</a>, <a href="/search/nucl-ex?searchtype=author&query=Pyle%2C+M">Matt Pyle</a>, <a href="/search/nucl-ex?searchtype=author&query=Ritz%2C+A">Adam Ritz</a>, <a href="/search/nucl-ex?searchtype=author&query=Schuster%2C+P">Philip Schuster</a>, <a href="/search/nucl-ex?searchtype=author&query=Shuve%2C+B">Brian Shuve</a>, <a href="/search/nucl-ex?searchtype=author&query=Toro%2C+N">Natalia Toro</a>, <a href="/search/nucl-ex?searchtype=author&query=Van+De+Water%2C+R+G">Richard G Van De Water</a>, <a href="/search/nucl-ex?searchtype=author&query=Akerib%2C+D">Daniel Akerib</a>, <a href="/search/nucl-ex?searchtype=author&query=An%2C+H">Haipeng An</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">Konrad Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">Isaac J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Asner%2C+D+M">David M. Asner</a>, <a href="/search/nucl-ex?searchtype=author&query=Back%2C+H+O">Henning O. Back</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+K">Keith Baker</a> , et al. (179 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="1608.08632v1-abstract-short" style="display: inline;"> This report, based on the Dark Sectors workshop at SLAC in April 2016, summarizes the scientific importance of searches for dark sector dark matter and forces at masses beneath the weak-scale, the status of this broad international field, the important milestones motivating future exploration, and promising experimental opportunities to reach these milestones over the next 5-10 years. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.08632v1-abstract-full" style="display: none;"> This report, based on the Dark Sectors workshop at SLAC in April 2016, summarizes the scientific importance of searches for dark sector dark matter and forces at masses beneath the weak-scale, the status of this broad international field, the important milestones motivating future exploration, and promising experimental opportunities to reach these milestones over the next 5-10 years. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.08632v1-abstract-full').style.display = 'none'; document.getElementById('1608.08632v1-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 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2016. </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">66 pages, 15 figures, 3 tables. Workshop website and agenda: http://www-conf.slac.stanford.edu/darksectors2016/ https://indico.cern.ch/event/507783/ Editors: J. Alexander, M. Battaglieri, B. Echenard, R. Essig, M. Graham, E. Izaguirre, J. Jaros, G. Krnjaic, J. Mardon, D. Morrissey, T. Nelson, M. Perelstein, M. Pyle, A. Ritz, P. Schuster, B. Shuve, N. Toro, R. Van De Water</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1607.07518">arXiv:1607.07518</a> <span> [<a href="https://arxiv.org/pdf/1607.07518">pdf</a>, <a href="https://arxiv.org/ps/1607.07518">ps</a>, <a href="https://arxiv.org/format/1607.07518">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.95.035206">10.1103/PhysRevC.95.035206 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Target and Beam-Target Spin Asymmetries in Exclusive Pion Electroproduction for $Q^2>1$ GeV$^2$. I. $e p \rightarrow e 蟺^+ n$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P+E">P. E. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Badui%2C+R+A">R. A. Badui</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+V">V. Batourine</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Carman%2C+D+S">D. S. Carman</a>, <a href="/search/nucl-ex?searchtype=author&query=Celentano%2C+A">A. Celentano</a>, <a href="/search/nucl-ex?searchtype=author&query=Chandavar%2C+S">S. Chandavar</a>, <a href="/search/nucl-ex?searchtype=author&query=Charles%2C+G">G. Charles</a>, <a href="/search/nucl-ex?searchtype=author&query=Clark%2C+L">L. Clark</a>, <a href="/search/nucl-ex?searchtype=author&query=Colaneri%2C+L">L. Colaneri</a>, <a href="/search/nucl-ex?searchtype=author&query=Cole%2C+P+L">P. L. Cole</a>, <a href="/search/nucl-ex?searchtype=author&query=Contalbrigo%2C+M">M. Contalbrigo</a>, <a href="/search/nucl-ex?searchtype=author&query=Crede%2C+V">V. Crede</a>, <a href="/search/nucl-ex?searchtype=author&query=D%27Angelo%2C+A">A. D'Angelo</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Vita%2C+R">R. De Vita</a> , et al. (93 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="1607.07518v3-abstract-short" style="display: inline;"> Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive $蟺^+$ electroproduction reaction $纬^* p \to n 蟺^+$. The results were obtained from scattering of 6 GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Lab. The kinematic range covered is $1.1<W<3$ GeV and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1607.07518v3-abstract-full').style.display = 'inline'; document.getElementById('1607.07518v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1607.07518v3-abstract-full" style="display: none;"> Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive $蟺^+$ electroproduction reaction $纬^* p \to n 蟺^+$. The results were obtained from scattering of 6 GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Lab. The kinematic range covered is $1.1<W<3$ GeV and $1<Q^2<6$ GeV$^2$. Results were obtained for about 6000 bins in $W$, $Q^2$, $\cos(胃^*)$, and $蠁^*$. Except at forward angles, very large target-spin asymmetries are observed over the entire $W$ region. Reasonable agreement is found with phenomenological fits to previous data for $W<1.6$ GeV, but very large differences are seen at higher values of $W$. A GPD-based model is in poor agreement with the data. When combined with cross section measurements, the present results provide powerful constraints on nucleon resonance amplitudes at moderate and large values of $Q^2$, for resonances with masses as high as 2.4 GeV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1607.07518v3-abstract-full').style.display = 'none'; document.getElementById('1607.07518v3-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 July, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2016. </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, 11 figures, 1 supplemental data file. This version was submitted to Phys. Rev. C on October 7, 2016. arXiv admin note: substantial text overlap with arXiv:1604.04350</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 95, 035206 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1607.03924">arXiv:1607.03924</a> <span> [<a href="https://arxiv.org/pdf/1607.03924">pdf</a>, <a href="https://arxiv.org/ps/1607.03924">ps</a>, <a href="https://arxiv.org/format/1607.03924">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.94.045206">10.1103/PhysRevC.94.045206 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of Target and Double-spin Asymmetries for the $\vec e\vec p\to e蟺^+ (n)$ Reaction in the Nucleon Resonance Region at Low $Q^2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Zheng%2C+X">X. Zheng</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Drozdov%2C+V">V. Drozdov</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Kang%2C+H">Hyekoo Kang</a>, <a href="/search/nucl-ex?searchtype=author&query=Kovacs%2C+K">K. Kovacs</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S">S. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Long%2C+E">E. Long</a>, <a href="/search/nucl-ex?searchtype=author&query=Phillips%2C+S+K">S. K. Phillips</a>, <a href="/search/nucl-ex?searchtype=author&query=Ripani%2C+M">M. Ripani</a>, <a href="/search/nucl-ex?searchtype=author&query=Slifer%2C+K">K. Slifer</a>, <a href="/search/nucl-ex?searchtype=author&query=Smith%2C+L+C">L. C. Smith</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Asryan%2C+G">G. Asryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Badui%2C+R+A">R. A. Badui</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+V">V. Batourine</a> , et al. (125 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="1607.03924v2-abstract-short" style="display: inline;"> We report measurements of target- and double-spin asymmetries for the exclusive channel $\vec e\vec p\to e蟺^+ (n)$ in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH$_3$ target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3 and 3… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1607.03924v2-abstract-full').style.display = 'inline'; document.getElementById('1607.03924v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1607.03924v2-abstract-full" style="display: none;"> We report measurements of target- and double-spin asymmetries for the exclusive channel $\vec e\vec p\to e蟺^+ (n)$ in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH$_3$ target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3 and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low $Q^2$ range from $0.0065$ to $0.35$ (GeV$/c$)$^2$. The $Q^2$ access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as $6^\circ$. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1607.03924v2-abstract-full').style.display = 'none'; document.getElementById('1607.03924v2-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 July, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2016. </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">20 pages, 15 figures, to appear in Phys. Rev. C</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1604.04350">arXiv:1604.04350</a> <span> [<a href="https://arxiv.org/pdf/1604.04350">pdf</a>, <a href="https://arxiv.org/ps/1604.04350">ps</a>, <a href="https://arxiv.org/format/1604.04350">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.94.055201">10.1103/PhysRevC.94.055201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Target and Beam-Target Spin Asymmetries in Exclusive $蟺^+$ and $蟺^-$ Electroproduction with 1.6 to 5.7 GeV Electrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P+E">P. E. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Careccia%2C+S">S. Careccia</a>, <a href="/search/nucl-ex?searchtype=author&query=Dodge%2C+G">G. Dodge</a>, <a href="/search/nucl-ex?searchtype=author&query=Fersch%2C+R">R. Fersch</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S+E">S. E. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Pierce%2C+J">J. Pierce</a>, <a href="/search/nucl-ex?searchtype=author&query=Prok%2C+Y">Y. Prok</a>, <a href="/search/nucl-ex?searchtype=author&query=Zheng%2C+X">X. Zheng</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Asryan%2C+G">G. Asryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Badui%2C+R+A">R. A. Badui</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+V">V. Batourine</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a> , et al. (137 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="1604.04350v3-abstract-short" style="display: inline;"> Beam-target double spin asymmetries and target single-spin asymmetries in exclusive $蟺^+$ and $蟺^-$ electroproduction were obtained from scattering of 1.6 to 5.7 GeV longitudinally polarized electrons from longitudinally polarized protons (for $蟺^+$) and deuterons (for $蟺^-$) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The kinematic range covered is $1.1<W<2.6$ GeV and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.04350v3-abstract-full').style.display = 'inline'; document.getElementById('1604.04350v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1604.04350v3-abstract-full" style="display: none;"> Beam-target double spin asymmetries and target single-spin asymmetries in exclusive $蟺^+$ and $蟺^-$ electroproduction were obtained from scattering of 1.6 to 5.7 GeV longitudinally polarized electrons from longitudinally polarized protons (for $蟺^+$) and deuterons (for $蟺^-$) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The kinematic range covered is $1.1<W<2.6$ GeV and $0.05<Q^2<5$ GeV$^2$, with good anglular coverage in the forward hemisphere. The asymmetry results were divided into approximately 40,000 kinematic bins for $蟺^+$ from free protons and 15,000 bins for $蟺^-$ production from bound nucleons in the deuteron. The present results are found to be in reasonable agreement with fits to previous world data for $W<1.7$ GeV and $Q^2<0.5$ GeV$^2$, with discrepancies increasing at higher values of $Q^2$, especially for $W>1.5$ GeV. Very large target-spin asymmetries are observed for $W>1.6$ GeV. When combined with cross section measurements, the present results will provide powerful constraints on nucleon resonance amplitudes at moderate and large values of $Q^2$, for resonances with masses as high as 2.3 GeV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.04350v3-abstract-full').style.display = 'none'; document.getElementById('1604.04350v3-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2016. </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">47 pages, 24 figures. This is a revised version that was accepted for publication in Phys. Rev. C. in early October, 2016</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 94, 055201 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.00315">arXiv:1603.00315</a> <span> [<a href="https://arxiv.org/pdf/1603.00315">pdf</a>, <a href="https://arxiv.org/format/1603.00315">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.95.065201">10.1103/PhysRevC.95.065201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of two-photon exchange effect by comparing elastic $e^\pm p$ cross sections </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Rimal%2C+D">D. Rimal</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Raue%2C+B+A">B. A. Raue</a>, <a href="/search/nucl-ex?searchtype=author&query=Weinstein%2C+L+B">L. B. Weinstein</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Ungaro%2C+M">M. Ungaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Badui%2C+R+A">R. A. Badui</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+V">V. Batourine</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Bennett%2C+R+P">R. P. Bennett</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Carman%2C+D+S">D. S. Carman</a>, <a href="/search/nucl-ex?searchtype=author&query=Celentano%2C+A">A. Celentano</a>, <a href="/search/nucl-ex?searchtype=author&query=Chetry%2C+T">T. Chetry</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciullo%2C+G">G. Ciullo</a> , et al. (120 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="1603.00315v3-abstract-short" style="display: inline;"> [Background] The electromagnetic form factors of the proton measured by unpolarized and polarized electron scattering experiments show a significant disagreement that grows with the squared four momentum transfer ($Q^{2}$). Calculations have shown that the two measurements can be largely reconciled by accounting for the contributions of two-photon exchange (TPE). TPE effects are not typically incl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.00315v3-abstract-full').style.display = 'inline'; document.getElementById('1603.00315v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.00315v3-abstract-full" style="display: none;"> [Background] The electromagnetic form factors of the proton measured by unpolarized and polarized electron scattering experiments show a significant disagreement that grows with the squared four momentum transfer ($Q^{2}$). Calculations have shown that the two measurements can be largely reconciled by accounting for the contributions of two-photon exchange (TPE). TPE effects are not typically included in the standard set of radiative corrections since theoretical calculations of the TPE effects are highly model dependent, and, until recently, no direct evidence of significant TPE effects has been observed. [Purpose] We measured the ratio of positron-proton to electron-proton elastic-scattering cross sections in order to determine the TPE contribution to elastic electron-proton scattering and thereby resolve the proton electric form factor discrepancy. [Methods] We produced a mixed simultaneous electron-positron beam in Jefferson Lab's Hall B by passing the 5.6 GeV primary electron beam through a radiator to produce a bremsstrahlung photon beam and then passing the photon beam through a convertor to produce electron/positron pairs. The mixed electron-positron (lepton) beam with useful energies from approximately 0.85 to 3.5 GeV then struck a 30-cm long liquid hydrogen (LH$_2$) target located within the CEBAF Large Acceptance Spectrometer (CLAS). By detecting both the scattered leptons and the recoiling protons we identified and reconstructed elastic scattering events and determined the incident lepton energy. A detailed description of the experiment is presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.00315v3-abstract-full').style.display = 'none'; document.getElementById('1603.00315v3-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, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2016. </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">21 pages, 22 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 95, 065201 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1511.03338">arXiv:1511.03338</a> <span> [<a href="https://arxiv.org/pdf/1511.03338">pdf</a>, <a href="https://arxiv.org/format/1511.03338">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.2017.02.032">10.1016/j.physletb.2017.02.032 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Target and Double Spin Asymmetries of Deeply Virtual $蟺^0$ Production with a Longitudinally Polarized Proton Target and CLAS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Kim%2C+A">A. Kim</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V">V. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Joo%2C+K">K. Joo</a>, <a href="/search/nucl-ex?searchtype=author&query=Kim%2C+W">W. Kim</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Akbar%2C+Z">Z. Akbar</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Badui%2C+R+A">R. A. Badui</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+V">V. Batourine</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Boiarinov%2C+S">S. Boiarinov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Cao%2C+T">T. Cao</a>, <a href="/search/nucl-ex?searchtype=author&query=Carman%2C+D+S">D. S. Carman</a>, <a href="/search/nucl-ex?searchtype=author&query=Celentano%2C+A">A. Celentano</a>, <a href="/search/nucl-ex?searchtype=author&query=Chandavar%2C+S">S. Chandavar</a>, <a href="/search/nucl-ex?searchtype=author&query=Charles%2C+G">G. Charles</a>, <a href="/search/nucl-ex?searchtype=author&query=Chetry%2C+T">T. Chetry</a>, <a href="/search/nucl-ex?searchtype=author&query=Colaneri%2C+L">L. Colaneri</a> , et al. (104 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="1511.03338v3-abstract-short" style="display: inline;"> The target and double spin asymmetries of the exclusive pseudoscalar channel $\vec e\vec p\to ep蟺^0$ were measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.03338v3-abstract-full').style.display = 'inline'; document.getElementById('1511.03338v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1511.03338v3-abstract-full" style="display: none;"> The target and double spin asymmetries of the exclusive pseudoscalar channel $\vec e\vec p\to ep蟺^0$ were measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divided into 110 four-dimensional bins of $Q^2$, $x_B$, $-t$ and $蠁$. Large values of asymmetry moments clearly indicate a substantial contribution to the polarized structure functions from transverse virtual photon amplitudes. The interpretation of experimental data in terms of generalized parton distributions (GPDs) provides the first insight on the chiral-odd GPDs $\tilde{H}_T$ and $E_T$, and complement previous measurements of unpolarized structure functions sensitive to the GPDs $H_T$ and $\bar E_T$. These data provide necessary constraints for chiral-odd GPD parametrizations and will strongly influence existing theoretical handbag models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.03338v3-abstract-full').style.display = 'none'; document.getElementById('1511.03338v3-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, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 November, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Letters B 768 (2017) 168-173 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1505.07877">arXiv:1505.07877</a> <span> [<a href="https://arxiv.org/pdf/1505.07877">pdf</a>, <a href="https://arxiv.org/format/1505.07877">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.92.055201">10.1103/PhysRevC.92.055201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precise Determination of the Deuteron Spin Structure at Low to Moderate $Q^2$ with CLAS and Extraction of the Neutron Contribution </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Guler%2C+N">N. Guler</a>, <a href="/search/nucl-ex?searchtype=author&query=Fersch%2C+R+G">R. G. Fersch</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S+E">S. E. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Griffioen%2C+K+A">K. A. Griffioen</a>, <a href="/search/nucl-ex?searchtype=author&query=Keith%2C+C">C. Keith</a>, <a href="/search/nucl-ex?searchtype=author&query=Minehart%2C+R">R. Minehart</a>, <a href="/search/nucl-ex?searchtype=author&query=Prok%2C+Y">Y. Prok</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+M+D">M. D. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Batourine%2C+V">V. Batourine</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedlinskiy%2C+I">I. Bedlinskiy</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Bultmann%2C+S">S. Bultmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Carman%2C+D+S">D. S. Carman</a>, <a href="/search/nucl-ex?searchtype=author&query=Celentano%2C+A">A. Celentano</a>, <a href="/search/nucl-ex?searchtype=author&query=Chandavar%2C+S">S. Chandavar</a>, <a href="/search/nucl-ex?searchtype=author&query=Charles%2C+G">G. Charles</a> , et al. (104 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="1505.07877v2-abstract-short" style="display: inline;"> We present the final results for the deuteron spin structure functions obtained from the full data set collected with Jefferson Lab's CLAS in 2000-2001. Polarized electrons with energies of 1.6, 2.5, 4.2 and 5.8 GeV were scattered from deuteron ($^{15}$ND$_3$) targets, dynamically polarized along the beam direction, and detected with CLAS. From the measured double spin asymmetry, the virtual photo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.07877v2-abstract-full').style.display = 'inline'; document.getElementById('1505.07877v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1505.07877v2-abstract-full" style="display: none;"> We present the final results for the deuteron spin structure functions obtained from the full data set collected with Jefferson Lab's CLAS in 2000-2001. Polarized electrons with energies of 1.6, 2.5, 4.2 and 5.8 GeV were scattered from deuteron ($^{15}$ND$_3$) targets, dynamically polarized along the beam direction, and detected with CLAS. From the measured double spin asymmetry, the virtual photon absorption asymmetry $A_1^d$ and the polarized structure function $g_1^d$ were extracted over a wide kinematic range (0.05 GeV$^2 < Q^2 <$ 5 GeV$^2$ and 0.9 GeV $< W <$ 3 GeV). We use an unfolding procedure and a parametrization of the corresponding proton results to extract from these data the polarized structure functions $A_1^n$ and $g_1^n$ of the (bound) neutron, which are so far unknown in the resonance region, $W < 2$ GeV. We compare our final results, including several moments of the deuteron and neutron spin structure functions, with various theoretical models and expectations as well as parametrizations of the world data. The unprecedented precision and dense kinematic coverage of these data can aid in future extractions of polarized parton distributions, tests of perturbative QCD predictions for the quark polarization at large $x$, a better understanding of quark-hadron duality, and more precise values for higher-twist matrix elements in the framework of the Operator Product Expansion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.07877v2-abstract-full').style.display = 'none'; document.getElementById('1505.07877v2-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, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2015. </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">To be published in 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 92, 055201 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1409.2043">arXiv:1409.2043</a> <span> [<a href="https://arxiv.org/pdf/1409.2043">pdf</a>, <a href="https://arxiv.org/ps/1409.2043">ps</a>, <a href="https://arxiv.org/format/1409.2043">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.2015.04.033">10.1016/j.physletb.2015.04.033 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Isolation of Flow and Nonflow Correlations by Two- and Four-Particle Cumulant Measurements of Azimuthal Harmonics in $\sqrt{s_{_{\rm NN}}} =$ 200 GeV Au+Au Collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Abdelwahab%2C+N+M">N. M. Abdelwahab</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Bouchet%2C+J">J. Bouchet</a> , et al. (325 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="1409.2043v1-abstract-short" style="display: inline;"> A data-driven method was applied to measurements of Au+Au collisions at $\sqrt{s_{_{\rm NN}}} =$ 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance $螖畏$-dependent and $螖畏$-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a component of the correlation that is $螖畏$-independent, which is likely dominated by anisotropi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.2043v1-abstract-full').style.display = 'inline'; document.getElementById('1409.2043v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1409.2043v1-abstract-full" style="display: none;"> A data-driven method was applied to measurements of Au+Au collisions at $\sqrt{s_{_{\rm NN}}} =$ 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance $螖畏$-dependent and $螖畏$-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a component of the correlation that is $螖畏$-independent, which is likely dominated by anisotropic flow and flow fluctuations. It was also found to be independent of $畏$ within the measured range of pseudorapidity $|畏|<1$. The relative flow fluctuation was found to be $34\% \pm 2\% (stat.) \pm 3\% (sys.)$ for particles of transverse momentum $p_{T}$ less than $2$ GeV/$c$. The $螖畏$-dependent part may be attributed to nonflow correlations, and is found to be $5\% \pm 2\% (sys.)$ relative to the flow of the measured second harmonic cumulant at $|螖畏| > 0.7$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.2043v1-abstract-full').style.display = 'none'; document.getElementById('1409.2043v1-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 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 745 (2015) 40 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1408.5017">arXiv:1408.5017</a> <span> [<a href="https://arxiv.org/pdf/1408.5017">pdf</a>, <a href="https://arxiv.org/format/1408.5017">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.91.034905">10.1103/PhysRevC.91.034905 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Charged-to-neutral correlation at forward rapidity 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=Abdelwahab%2C+N+M">N. M. Abdelwahab</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</a> , et al. (326 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="1408.5017v1-abstract-short" style="display: inline;"> Event-by-event fluctuations of the ratio of inclusive charged to photon multiplicities at forward rapidity in Au+Au collision at $\sqrt{s_{NN}}$=200 GeV have been studied. Dominant contribution to such fluctuations is expected to come from correlated production of charged and neutral pions. We search for evidences of dynamical fluctuations of different physical origins. Observables constructed out… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1408.5017v1-abstract-full').style.display = 'inline'; document.getElementById('1408.5017v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1408.5017v1-abstract-full" style="display: none;"> Event-by-event fluctuations of the ratio of inclusive charged to photon multiplicities at forward rapidity in Au+Au collision at $\sqrt{s_{NN}}$=200 GeV have been studied. Dominant contribution to such fluctuations is expected to come from correlated production of charged and neutral pions. We search for evidences of dynamical fluctuations of different physical origins. Observables constructed out of moments of multiplicities are used as measures of fluctuations. Mixed events and model calculations are used as baselines. Results are compared to the dynamical net-charge fluctuations measured in the same acceptance. A non-zero statistically significant signal of dynamical fluctuations is observed in excess to the model prediction when charged particles and photons are measured in the same acceptance. We find that, unlike dynamical net-charge fluctuation, charge-neutral fluctuation is not dominated by correlation due to particle decay. Results are compared to the expectations based on the generic production mechanism of pions due to isospin symmetry, for which no significant (<1%) deviation is observed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1408.5017v1-abstract-full').style.display = 'none'; document.getElementById('1408.5017v1-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 August, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2014. </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, 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 91, 034905 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.5134">arXiv:1405.5134</a> <span> [<a href="https://arxiv.org/pdf/1405.5134">pdf</a>, <a href="https://arxiv.org/format/1405.5134">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/PhysRevLett.115.092002">10.1103/PhysRevLett.115.092002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision Measurement of the Longitudinal Double-spin Asymmetry for Inclusive Jet 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</a> , et al. (336 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="1405.5134v1-abstract-short" style="display: inline;"> We report a new high-precision measurement of the mid-rapidity inclusive jet longitudinal double-spin asymmetry, $A_{LL}$, in polarized $pp$ collisions at center-of-mass energy $\sqrt{s}=200$ GeV. The STAR data place stringent constraints on polarized parton distribution functions extracted at next-to-leading order from global analyses of inclusive deep inelastic scattering (DIS), semi-inclusive D… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.5134v1-abstract-full').style.display = 'inline'; document.getElementById('1405.5134v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.5134v1-abstract-full" style="display: none;"> We report a new high-precision measurement of the mid-rapidity inclusive jet longitudinal double-spin asymmetry, $A_{LL}$, in polarized $pp$ collisions at center-of-mass energy $\sqrt{s}=200$ GeV. The STAR data place stringent constraints on polarized parton distribution functions extracted at next-to-leading order from global analyses of inclusive deep inelastic scattering (DIS), semi-inclusive DIS, and RHIC $pp$ data. The measured asymmetries provide evidence for positive gluon polarization in the Bjorken-$x$ region $x>0.05$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.5134v1-abstract-full').style.display = 'none'; document.getElementById('1405.5134v1-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> 20 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2014. </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</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 115, 092002 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.6880">arXiv:1404.6880</a> <span> [<a href="https://arxiv.org/pdf/1404.6880">pdf</a>, <a href="https://arxiv.org/format/1404.6880">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.113.072301">10.1103/PhysRevLett.113.072301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of longitudinal spin asymmetries for weak boson production in polarized proton-proton 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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. (336 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="1404.6880v2-abstract-short" style="display: inline;"> We report measurements of single- and double- spin asymmetries for $W^{\pm}$ and $Z/纬^*$ boson production in longitudinally polarized $p+p$ collisions at $\sqrt{s} = 510$ GeV by the STAR experiment at RHIC. The asymmetries for $W^{\pm}$ were measured as a function of the decay lepton pseudorapidity, which provides a theoretically clean probe of the proton's polarized quark distributions at the sca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6880v2-abstract-full').style.display = 'inline'; document.getElementById('1404.6880v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.6880v2-abstract-full" style="display: none;"> We report measurements of single- and double- spin asymmetries for $W^{\pm}$ and $Z/纬^*$ boson production in longitudinally polarized $p+p$ collisions at $\sqrt{s} = 510$ GeV by the STAR experiment at RHIC. The asymmetries for $W^{\pm}$ were measured as a function of the decay lepton pseudorapidity, which provides a theoretically clean probe of the proton's polarized quark distributions at the scale of the $W$ mass. The results are compared to theoretical predictions, constrained by recent polarized deep inelastic scattering measurements, and show a preference for a sizable, positive up antiquark polarization in the range $0.05<x<0.2$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6880v2-abstract-full').style.display = 'none'; document.getElementById('1404.6880v2-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, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </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, 5 figures, Submitted to Physical Review Letters; replaced with 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. 113, 072301 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.6231">arXiv:1404.6231</a> <span> [<a href="https://arxiv.org/pdf/1404.6231">pdf</a>, <a href="https://arxiv.org/format/1404.6231">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.90.025212">10.1103/PhysRevC.90.025212 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision measurements of $g_1$ of the proton and the deuteron with 6 GeV electrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Prok%2C+Y">Y. Prok</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Kvaltine%2C+N">N. Kvaltine</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Adikaram%2C+D">D. Adikaram</a>, <a href="/search/nucl-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+M+D">M. D. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Baghdasaryan%2C+H">H. Baghdasaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Biselli%2C+A+S">A. S. Biselli</a>, <a href="/search/nucl-ex?searchtype=author&query=Bono%2C+J">J. Bono</a>, <a href="/search/nucl-ex?searchtype=author&query=Briscoe%2C+W+J">W. J. Briscoe</a>, <a href="/search/nucl-ex?searchtype=author&query=Brock%2C+J">J. Brock</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Carlin%2C+C">C. Carlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Carman%2C+D+S">D. S. Carman</a>, <a href="/search/nucl-ex?searchtype=author&query=Celentano%2C+A">A. Celentano</a>, <a href="/search/nucl-ex?searchtype=author&query=Chandavar%2C+S">S. Chandavar</a> , et al. (138 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="1404.6231v1-abstract-short" style="display: inline;"> The inclusive polarized structure functions of the proton and deuteron, g1p and g1d, were measured with high statistical precision using polarized 6 GeV electrons incident on a polarized ammonia target in Hall B at Jefferson Laboratory. Electrons scattered at lab angles between 18 and 45 degrees were detected using the CEBAF Large Acceptance Spectrometer (CLAS). For the usual DIS kinematics, Q^2>1… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6231v1-abstract-full').style.display = 'inline'; document.getElementById('1404.6231v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.6231v1-abstract-full" style="display: none;"> The inclusive polarized structure functions of the proton and deuteron, g1p and g1d, were measured with high statistical precision using polarized 6 GeV electrons incident on a polarized ammonia target in Hall B at Jefferson Laboratory. Electrons scattered at lab angles between 18 and 45 degrees were detected using the CEBAF Large Acceptance Spectrometer (CLAS). For the usual DIS kinematics, Q^2>1 GeV^2 and the final-state invariant mass W>2 GeV, the ratio of polarized to unpolarized structure functions g1/F1 is found to be nearly independent of Q^2 at fixed x. Significant resonant structure is apparent at values of W up to 2.3 GeV. In the framework of perturbative QCD, the high-W results can be used to better constrain the polarization of quarks and gluons in the nucleon, as well as high-twist contributions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6231v1-abstract-full').style.display = 'none'; document.getElementById('1404.6231v1-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 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 90, 025212 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.6185">arXiv:1404.6185</a> <span> [<a href="https://arxiv.org/pdf/1404.6185">pdf</a>, <a href="https://arxiv.org/ps/1404.6185">ps</a>, <a href="https://arxiv.org/format/1404.6185">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.113.142301">10.1103/PhysRevLett.113.142301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of $D^0$ meson nuclear modifications in Au+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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Bouchet%2C+J">J. Bouchet</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="1404.6185v3-abstract-short" style="display: inline;"> We report the first measurement of charmed-hadron ($D^0$) production via the hadronic decay channel ($D^0\rightarrow K^- + 蟺^+$) in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200\,GeV with the STAR experiment. The charm production cross-section per nucleon-nucleon collision at mid-rapidity scales with the number of binary collisions, $N_{bin}$, from $p$+$p$ to central Au+Au collisions. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6185v3-abstract-full').style.display = 'inline'; document.getElementById('1404.6185v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.6185v3-abstract-full" style="display: none;"> We report the first measurement of charmed-hadron ($D^0$) production via the hadronic decay channel ($D^0\rightarrow K^- + 蟺^+$) in Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200\,GeV with the STAR experiment. The charm production cross-section per nucleon-nucleon collision at mid-rapidity scales with the number of binary collisions, $N_{bin}$, from $p$+$p$ to central Au+Au collisions. The $D^0$ meson yields in central Au+Au collisions are strongly suppressed compared to those in $p$+$p$ scaled by $N_{bin}$, for transverse momenta $p_{T}>3$ GeV/$c$, demonstrating significant energy loss of charm quarks in the hot and dense medium. An enhancement at intermediate $p_{T}$ is also observed. Model calculations including strong charm-medium interactions and coalescence hadronization describe our measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6185v3-abstract-full').style.display = 'none'; document.getElementById('1404.6185v3-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 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </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 including author list, 4 figures, submit to PRL with revised 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. 113, 142301 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.1433">arXiv:1404.1433</a> <span> [<a href="https://arxiv.org/pdf/1404.1433">pdf</a>, <a href="https://arxiv.org/ps/1404.1433">ps</a>, <a href="https://arxiv.org/format/1404.1433">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.113.052302">10.1103/PhysRevLett.113.052302 <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 charge separation along the magnetic field 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</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="1404.1433v2-abstract-short" style="display: inline;"> Local parity-odd domains are theorized to form inside a Quark-Gluon-Plasma (QGP) which has been produced in high-energy heavy-ion collisions. The local parity-odd domains manifest themselves as charge separation along the magnetic field axis via the chiral magnetic effect (CME). The experimental observation of charge separation has previously been reported for heavy-ion collisions at the top RHIC… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.1433v2-abstract-full').style.display = 'inline'; document.getElementById('1404.1433v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.1433v2-abstract-full" style="display: none;"> Local parity-odd domains are theorized to form inside a Quark-Gluon-Plasma (QGP) which has been produced in high-energy heavy-ion collisions. The local parity-odd domains manifest themselves as charge separation along the magnetic field axis via the chiral magnetic effect (CME). The experimental observation of charge separation has previously been reported for heavy-ion collisions at the top RHIC energies. In this paper, we present the results of the beam-energy dependence of the charge correlations in Au+Au collisions at midrapidity for center-of-mass energies of 7.7, 11.5, 19.6, 27, 39 and 62.4 GeV from the STAR experiment. After background subtraction, the signal gradually reduces with decreased beam energy, and tends to vanish by 7.7 GeV. The implications of these results for the CME will be discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.1433v2-abstract-full').style.display = 'none'; document.getElementById('1404.1433v2-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 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </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">6 pages, 4 figures, accepted by Phys. Rev. Lett (more model comparisons have been added in version 2)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 113, 052302 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1403.4972">arXiv:1403.4972</a> <span> [<a href="https://arxiv.org/pdf/1403.4972">pdf</a>, <a href="https://arxiv.org/ps/1403.4972">ps</a>, <a href="https://arxiv.org/format/1403.4972">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.92.014904">10.1103/PhysRevC.92.014904 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beam energy dependent two-pion interferometry and the freeze-out eccentricity of pions in heavy ion collisions 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</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="1403.4972v1-abstract-short" style="display: inline;"> We present results of analyses of two-pion interferometry in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV measured in the STAR detector as part of the RHIC Beam Energy Scan program. The extracted correlation lengths (HBT radii) are studied as a function of beam energy, azimuthal angle relative to the reaction plane, centrality, and transverse mass ($m_{T}$) of th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1403.4972v1-abstract-full').style.display = 'inline'; document.getElementById('1403.4972v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1403.4972v1-abstract-full" style="display: none;"> We present results of analyses of two-pion interferometry in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV measured in the STAR detector as part of the RHIC Beam Energy Scan program. The extracted correlation lengths (HBT radii) are studied as a function of beam energy, azimuthal angle relative to the reaction plane, centrality, and transverse mass ($m_{T}$) of the particles. The azimuthal analysis allows extraction of the eccentricity of the entire fireball at kinetic freeze-out. The energy dependence of this observable is expected to be sensitive to changes in the equation of state. A new global fit method is studied as an alternate method to directly measure the parameters in the azimuthal analysis. The eccentricity shows a monotonic decrease with beam energy that is qualitatively consistent with the trend from all model predictions and quantitatively consistent with a hadronic transport model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1403.4972v1-abstract-full').style.display = 'none'; document.getElementById('1403.4972v1-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> 19 March, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2014. </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; 27 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 92, 014904 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1402.2477">arXiv:1402.2477</a> <span> [<a href="https://arxiv.org/pdf/1402.2477">pdf</a>, <a href="https://arxiv.org/format/1402.2477">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.89.045206">10.1103/PhysRevC.89.045206 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the structure function of the nearly free neutron using spectator tagging in inelastic $^2$H(e, e'p)X scattering with CLAS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Tkachenko%2C+S">S. Tkachenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Baillie%2C+N">N. Baillie</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S+E">S. E. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+J">J. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCltmann%2C+S">S. B眉ltmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Christy%2C+M+E">M. E. Christy</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Ent%2C+R">R. Ent</a>, <a href="/search/nucl-ex?searchtype=author&query=Fenker%2C+H">H. Fenker</a>, <a href="/search/nucl-ex?searchtype=author&query=Griffioen%2C+K+A">K. A. Griffioen</a>, <a href="/search/nucl-ex?searchtype=author&query=Ispiryan%2C+M">M. Ispiryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Kalantarians%2C+N">N. Kalantarians</a>, <a href="/search/nucl-ex?searchtype=author&query=Keppel%2C+C+E">C. E. Keppel</a>, <a href="/search/nucl-ex?searchtype=author&query=Melnitchouk%2C+W">W. Melnitchouk</a>, <a href="/search/nucl-ex?searchtype=author&query=Tvaskis%2C+V">V. Tvaskis</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K+P">K. P. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M+J">M. J. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+S+A">S. Anefalos Pereira</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+J">J. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N+A">N. A. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a> , et al. (126 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="1402.2477v2-abstract-short" style="display: inline;"> Much less is known about neutron structure than that of the proton due to the absence of free neutron targets. Neutron information is usually extracted from data on nuclear targets such as deuterium, requiring corrections for nuclear binding and nucleon off-shell effects. These corrections are model dependent and have significant uncertainties, especially for large values of the Bjorken scaling va… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1402.2477v2-abstract-full').style.display = 'inline'; document.getElementById('1402.2477v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1402.2477v2-abstract-full" style="display: none;"> Much less is known about neutron structure than that of the proton due to the absence of free neutron targets. Neutron information is usually extracted from data on nuclear targets such as deuterium, requiring corrections for nuclear binding and nucleon off-shell effects. These corrections are model dependent and have significant uncertainties, especially for large values of the Bjorken scaling variable x. The Barely Off-shell Nucleon Structure (BONuS) experiment at Jefferson Lab measured the inelastic electron deuteron scattering cross section, tagging spectator protons in coincidence with the scattered electrons. This method reduces nuclear binding uncertainties significantly and has allowed for the first time a (nearly) model independent extraction of the neutron structure function. A novel compact radial time projection chamber was built to detect protons with momentum between 70 and 150 MeV/c. For the extraction of the free neutron structure function $F_{2n}$, spectator protons at backward angle and with momenta below 100 MeV/c were selected, ensuring that the scattering took place on a nearly free neutron. The scattered electrons were detected with Jefferson Lab's CLAS spectrometer. The extracted neutron structure function $F_{2n}$ and its ratio to the deuteron structure function $F_{2d}$ are presented in both the resonance and deep inelastic regions. The dependence of the cross section on the spectator proton momentum and angle is investigated, and tests of the spectator mechanism for different kinematics are performed. Our data set can be used to study neutron resonance excitations, test quark hadron duality in the neutron, develop more precise parametrizations of structure functions, as well as investigate binding effects (including possible mechanisms for the nuclear EMC effect) and provide a first glimpse of the asymptotic behavior of d/u as x goes to 1. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1402.2477v2-abstract-full').style.display = 'none'; document.getElementById('1402.2477v2-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, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 February, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2014. </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">28 pages, 22 figures; published in Phys. Rev. C. Revised to include three authors inadvertently left off the original version: D. Dutta, R. Ent, and M. Ispiryan</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-14-1844 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 89, 045206 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.3043">arXiv:1401.3043</a> <span> [<a href="https://arxiv.org/pdf/1401.3043">pdf</a>, <a href="https://arxiv.org/ps/1401.3043">ps</a>, <a href="https://arxiv.org/format/1401.3043">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.112.162301">10.1103/PhysRevLett.112.162301 <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 Directed Flow of Protons, Antiprotons and Pions 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</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="1401.3043v2-abstract-short" style="display: inline;"> Rapidity-odd directed flow($v_1$) measurements for charged pions, protons and antiprotons near mid-rapidity ($y=0$) are reported in $\sqrt{s_{NN}} =$ 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV Au + Au collisions as recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC). At intermediate impact parameters, the proton and net-proton slope parameter $dv_1/dy|_{y=0}$ shows a minimum… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.3043v2-abstract-full').style.display = 'inline'; document.getElementById('1401.3043v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.3043v2-abstract-full" style="display: none;"> Rapidity-odd directed flow($v_1$) measurements for charged pions, protons and antiprotons near mid-rapidity ($y=0$) are reported in $\sqrt{s_{NN}} =$ 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV Au + Au collisions as recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC). At intermediate impact parameters, the proton and net-proton slope parameter $dv_1/dy|_{y=0}$ shows a minimum between 11.5 and 19.6 GeV. In addition, the net-proton $dv_1/dy|_{y=0}$ changes sign twice between 7.7 and 39 GeV. The proton and net-proton results qualitatively resemble predictions of a hydrodynamic model with a first-order phase transition from hadronic matter to deconfined matter, and differ from hadronic transport calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.3043v2-abstract-full').style.display = 'none'; document.getElementById('1401.3043v2-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 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2014. </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">Post-referee version, accepted by PRL. Fig. 2 now includes panels for 62.4 and 200 GeV</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.7397">arXiv:1312.7397</a> <span> [<a href="https://arxiv.org/pdf/1312.7397">pdf</a>, <a href="https://arxiv.org/ps/1312.7397">ps</a>, <a href="https://arxiv.org/format/1312.7397">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/PhysRevLett.113.022301">10.1103/PhysRevLett.113.022301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dielectron Mass Spectra from 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</a> , et al. (331 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="1312.7397v4-abstract-short" style="display: inline;"> We report the STAR measurements of dielectron ($e^+e^-$) production at midrapidity ($|y_{ee}|<$1) in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200\,GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 ($蟻$-like), 0.76-0.80 ($蠅$-like), and 0.98-1.05 ($蠁$-like) GeV/$c^{2}$. The spectrum in the $蠅$-like and $蠁$-like regions can be well described by the had… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.7397v4-abstract-full').style.display = 'inline'; document.getElementById('1312.7397v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.7397v4-abstract-full" style="display: none;"> We report the STAR measurements of dielectron ($e^+e^-$) production at midrapidity ($|y_{ee}|<$1) in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200\,GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 ($蟻$-like), 0.76-0.80 ($蠅$-like), and 0.98-1.05 ($蠁$-like) GeV/$c^{2}$. The spectrum in the $蠅$-like and $蠁$-like regions can be well described by the hadronic cocktail simulation. In the $蟻$-like region, however, the vacuum $蟻$ spectral function cannot describe the shape of the dielectron excess. In this range, an enhancement of 1.77$\pm$0.11(stat.)$\pm$0.24(sys.)$\pm$0.33(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the $蟻$ meson. The excess yield in the $蟻$-like region increases with the number of collision participants faster than the $蠅$ and $蠁$ yields. Theoretical models with broadened $蟻$ contributions through interactions with constituents in the hot QCD medium provide a consistent description of the dilepton mass spectra for the measurement presented here and the earlier data at the Super Proton Synchrotron energies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.7397v4-abstract-full').style.display = 'none'; document.getElementById('1312.7397v4-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 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 113, 022301 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.3675">arXiv:1312.3675</a> <span> [<a href="https://arxiv.org/pdf/1312.3675">pdf</a>, <a href="https://arxiv.org/format/1312.3675">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.2014.06.028">10.1016/j.physletb.2014.06.028 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Suppression of Upsilon Production in d+Au and 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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>, <a href="/search/nucl-ex?searchtype=author&query=Borowski%2C+W">W. Borowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Bouchet%2C+J">J. Bouchet</a> , et al. (335 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="1312.3675v3-abstract-short" style="display: inline;"> We report measurements of Upsilon meson production in p+p, d+Au, and Au+Au collisions using the STAR detector at RHIC. We compare the Upsilon yield to the measured cross section in p+p collisions in order to quantify any modifications of the yield in cold nuclear matter using d+Au data and in hot nuclear matter using Au+Au data separated into three centrality classes. Our p+p measurement is based… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.3675v3-abstract-full').style.display = 'inline'; document.getElementById('1312.3675v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.3675v3-abstract-full" style="display: none;"> We report measurements of Upsilon meson production in p+p, d+Au, and Au+Au collisions using the STAR detector at RHIC. We compare the Upsilon yield to the measured cross section in p+p collisions in order to quantify any modifications of the yield in cold nuclear matter using d+Au data and in hot nuclear matter using Au+Au data separated into three centrality classes. Our p+p measurement is based on three times the statistics of our previous result. We obtain a nuclear modification factor for Upsilon(1S+2S+3S) in the rapidity range |y|<1 in d+Au collisions of R_dAu = 0.79 +/- 0.24 (stat.) +/- 0.03 (sys.) +/- 0.10 (pp sys.). A comparison with models including shadowing and initial state parton energy loss indicates the presence of additional cold-nuclear matter suppression. Similarly, in the top 10% most-central Au+Au collisions, we measure a nuclear modification factor of R_AA=0.49 +/- 0.1 (stat.) +/- 0.02 (sys.) +/- 0.06 (pp sys.), which is a larger suppression factor than that seen in cold nuclear matter. Our results are consistent with complete suppression of excited-state Upsilon mesons in Au+Au collisions. The additional suppression in Au+Au is consistent with the level expected in model calculations that include the presence of a hot, deconfined Quark-Gluon Plasma. However, understanding the suppression seen in d+Au is still needed before any definitive statements about the nature of the suppression in Au+Au can be made. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.3675v3-abstract-full').style.display = 'none'; document.getElementById('1312.3675v3-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> 20 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </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. Lett. B 735 (2014) 127 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.1621">arXiv:1311.1621</a> <span> [<a href="https://arxiv.org/pdf/1311.1621">pdf</a>, <a href="https://arxiv.org/ps/1311.1621">ps</a>, <a href="https://arxiv.org/format/1311.1621">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.2014.10.049">10.1016/j.physletb.2014.10.049 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> $J/蠄$ polarization in p+p collisions at $\sqrt{s}$ = 200 GeV in 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Barnovska%2C+Z">Z. Barnovska</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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> , 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="1311.1621v2-abstract-short" style="display: inline;"> We report on a polarization measurement of inclusive $J/蠄$ mesons in the di-electron decay channel at mid-rapidity at 2 $<p_{T}<$ 6 GeV/$c$ in $p+p$ collisions at $\sqrt{s}$ = 200 GeV. Data were taken with the STAR detector at RHIC. The $J/蠄$ polarization measurement should help to distinguish between different models of the $J/蠄$ production mechanism since they predict different $p_{T}$ dependenc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.1621v2-abstract-full').style.display = 'inline'; document.getElementById('1311.1621v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.1621v2-abstract-full" style="display: none;"> We report on a polarization measurement of inclusive $J/蠄$ mesons in the di-electron decay channel at mid-rapidity at 2 $<p_{T}<$ 6 GeV/$c$ in $p+p$ collisions at $\sqrt{s}$ = 200 GeV. Data were taken with the STAR detector at RHIC. The $J/蠄$ polarization measurement should help to distinguish between different models of the $J/蠄$ production mechanism since they predict different $p_{T}$ dependences of the $J/蠄$ polarization. In this analysis, $J/蠄$ polarization is studied in the helicity frame. The polarization parameter $位_胃$ measured at RHIC becomes smaller towards high $p_{T}$, indicating more longitudinal $J/蠄$ polarization as $p_{T}$ increases. The result is compared with predictions of presently available models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.1621v2-abstract-full').style.display = 'none'; document.getElementById('1311.1621v2-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 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </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">11 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> WUT-13-01 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1310.3563">arXiv:1310.3563</a> <span> [<a href="https://arxiv.org/pdf/1310.3563">pdf</a>, <a href="https://arxiv.org/format/1310.3563">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.90.024906">10.1103/PhysRevC.90.024906 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> $J/蠄$ production at low $p_T$ in Au+Au and Cu+Cu collisions at $\sqrt{s_{_{NN}}}$ = 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Barnovska%2C+Z">Z. Barnovska</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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> , 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="1310.3563v2-abstract-short" style="display: inline;"> The $\jpsi$ $\pt$ spectrum and nuclear modification factor ($\raa$) are reported for $\pt < 5 \ \gevc$ and $|y|<1$ from 0\% to 60\% central Au+Au and Cu+Cu collisions at $\snn = 200 \ \gev$ at STAR. A significant suppression of $\pt$-integrated $\jpsi$ production is observed in central Au+Au events. The Cu+Cu data are consistent with no suppression, although the precision is limited by the availab… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.3563v2-abstract-full').style.display = 'inline'; document.getElementById('1310.3563v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.3563v2-abstract-full" style="display: none;"> The $\jpsi$ $\pt$ spectrum and nuclear modification factor ($\raa$) are reported for $\pt < 5 \ \gevc$ and $|y|<1$ from 0\% to 60\% central Au+Au and Cu+Cu collisions at $\snn = 200 \ \gev$ at STAR. A significant suppression of $\pt$-integrated $\jpsi$ production is observed in central Au+Au events. The Cu+Cu data are consistent with no suppression, although the precision is limited by the available statistics. $\raa$ in Au+Au collisions exhibits a strong suppression at low transverse momentum and gradually increases with $\pt$. The data are compared to high-$\pt$ STAR results and previously published BNL Relativistic Heavy Ion Collider results. Comparing with model calculations, it is found that the invariant yields at low $\pt$ are significantly above hydrodynamic flow predictions but are consistent with models that include color screening and regeneration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.3563v2-abstract-full').style.display = 'none'; document.getElementById('1310.3563v2-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 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2013. </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, 13 figures. Accepted by 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 90, 024906 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1309.5681">arXiv:1309.5681</a> <span> [<a href="https://arxiv.org/pdf/1309.5681">pdf</a>, <a href="https://arxiv.org/ps/1309.5681">ps</a>, <a href="https://arxiv.org/format/1309.5681">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 - Lattice">hep-lat</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.112.032302">10.1103/PhysRevLett.112.032302 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Energy Dependence of Moments of Net-proton Multiplicity Distributions 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Barnovska%2C+Z">Z. Barnovska</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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> , 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="1309.5681v1-abstract-short" style="display: inline;"> We report the beam energy (\sqrt s_{NN} = 7.7 - 200 GeV) and collision centrality dependence of the mean (M), standard deviation (蟽), skewness (S), and kurtosis (魏) of the net-proton multiplicity distributions in Au+Au collisions. The measurements are carried out by the STAR experiment at midrapidity (|y| < 0.5) and within the transverse momentum range 0.4 < pT < 0.8 GeV/c in the first phase of th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.5681v1-abstract-full').style.display = 'inline'; document.getElementById('1309.5681v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.5681v1-abstract-full" style="display: none;"> We report the beam energy (\sqrt s_{NN} = 7.7 - 200 GeV) and collision centrality dependence of the mean (M), standard deviation (蟽), skewness (S), and kurtosis (魏) of the net-proton multiplicity distributions in Au+Au collisions. The measurements are carried out by the STAR experiment at midrapidity (|y| < 0.5) and within the transverse momentum range 0.4 < pT < 0.8 GeV/c in the first phase of the Beam Energy Scan program at the Relativistic Heavy Ion Collider. These measurements are important for understanding the Quantum Chromodynamic (QCD) phase diagram. The products of the moments, S蟽and 魏蟽^{2}, are sensitive to the correlation length of the hot and dense medium created in the collisions and are related to the ratios of baryon number susceptibilities of corresponding orders. The products of moments are found to have values significantly below the Skellam expectation and close to expectations based on independent proton and anti-proton production. The measurements are compared to a transport model calculation to understand the effect of acceptance and baryon number conservation, and also to a hadron resonance gas model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.5681v1-abstract-full').style.display = 'none'; document.getElementById('1309.5681v1-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 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2013. </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 and 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. Lett. 112 (2014) 032302 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1309.1800">arXiv:1309.1800</a> <span> [<a href="https://arxiv.org/pdf/1309.1800">pdf</a>, <a href="https://arxiv.org/ps/1309.1800">ps</a>, <a href="https://arxiv.org/format/1309.1800">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.89.012001">10.1103/PhysRevD.89.012001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Neutral pion cross section and spin asymmetries at intermediate pseudorapidity 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=Adamczyk%2C+L">L. Adamczyk</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=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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=Averichev%2C+G+S">G. S. Averichev</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Barber%2C+B">B. Barber</a>, <a href="/search/nucl-ex?searchtype=author&query=Barnovska%2C+Z">Z. Barnovska</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</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=Bhattarai%2C+P">P. Bhattarai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bichsel%2C+H">H. Bichsel</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> , et al. (341 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="1309.1800v2-abstract-short" style="display: inline;"> The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 < 畏 < 2.0 in polarized proton-proton collisions at sqrt{s} = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 < p_T < 16 GeV/c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.1800v2-abstract-full').style.display = 'inline'; document.getElementById('1309.1800v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.1800v2-abstract-full" style="display: none;"> The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 < 畏 < 2.0 in polarized proton-proton collisions at sqrt{s} = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 < p_T < 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, A_LL, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, 螖g(x), at low Bjorken-x (down to x approx 0.01), where it is less constrained by measurements at central pseudorapidity. The measured A_LL is consistent with model predictions. The parity-violating asymmetry, A_L, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, A_N, is measured within a previously unexplored kinematic range in Feynman-x and p_T. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity (畏 approx 3) and their underlying mechanisms. The A_N results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.1800v2-abstract-full').style.display = 'none'; document.getElementById('1309.1800v2-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 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2013. </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">11 pages, 9 figures, REVTeX 4.1, Submitted to Phys. Rev. D. Changes for version 2: minor textual updates, modified discussion of gluonic polarization, clarified description of Fig. 4, and corrected sign convention in Fig. 8</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 89, 012001 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1303.0901">arXiv:1303.0901</a> <span> [<a href="https://arxiv.org/pdf/1303.0901">pdf</a>, <a href="https://arxiv.org/ps/1303.0901">ps</a>, <a href="https://arxiv.org/format/1303.0901">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> </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.89.044908">10.1103/PhysRevC.89.044908 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of Charge Multiplicity Asymmetry Correlations in High Energy Nucleus-Nucleus Collisions at 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=Adamczyk%2C+L">L. Adamczyk</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=Alakhverdyants%2C+A+V">A. V. Alakhverdyants</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alford%2C+J">J. Alford</a>, <a href="/search/nucl-ex?searchtype=author&query=Anson%2C+C+D">C. D. Anson</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">E. Aschenauer</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=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Barnovska%2C+Z">Z. Barnovska</a>, <a href="/search/nucl-ex?searchtype=author&query=Beavis%2C+D+R">D. R. Beavis</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellwied%2C+R">R. Bellwied</a>, <a href="/search/nucl-ex?searchtype=author&query=Betancourt%2C+M+J">M. J. Betancourt</a>, <a href="/search/nucl-ex?searchtype=author&query=Betts%2C+R+R">R. R. Betts</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=Bichsel%2C+H">H. Bichsel</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> , 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="1303.0901v2-abstract-short" style="display: inline;"> A study is reported of the same- and opposite-sign charge-dependent azimuthal correlations with respect to the event plane in Au+Au collisions at 200 GeV. The charge multiplicity asymmetries between the up/down and left/right hemispheres relative to the event plane are utilized. The contributions from statistical fluctuations and detector effects were subtracted from the (co-)variance of the obser… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.0901v2-abstract-full').style.display = 'inline'; document.getElementById('1303.0901v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1303.0901v2-abstract-full" style="display: none;"> A study is reported of the same- and opposite-sign charge-dependent azimuthal correlations with respect to the event plane in Au+Au collisions at 200 GeV. The charge multiplicity asymmetries between the up/down and left/right hemispheres relative to the event plane are utilized. The contributions from statistical fluctuations and detector effects were subtracted from the (co-)variance of the observed charge multiplicity asymmetries. In the mid- to most-central collisions, the same- (opposite-) sign pairs are preferentially emitted in back-to-back (aligned on the same-side) directions. The charge separation across the event plane, measured by the difference, $螖$, between the like- and unlike-sign up/down $-$ left/right correlations, is largest near the event plane. The difference is found to be proportional to the event-by-event final-state particle ellipticity (via the observed second-order harmonic $v^{\rm obs}_{2}$), where $螖=(1.3\pm1.4({\rm stat})^{+4.0}_{-1.0}({\rm syst}))\times10^{-5}+(3.2\pm0.2({\rm stat})^{+0.4}_{-0.3}({\rm syst}))\times10^{-3}v^{\rm obs}_{2}$ for 20-40% Au+Au collisions. The implications for the proposed chiral magnetic effect are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1303.0901v2-abstract-full').style.display = 'none'; document.getElementById('1303.0901v2-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 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 March, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2013. </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, 25 figures, 2 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> L. Adamczyk et al. (STAR Collaboration), Phys. Rev. C 89 (2014) 044908 </p> </li> </ol> <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=Bultmann%2C+S&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Bultmann%2C+S&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Bultmann%2C+S&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> 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