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is-link">Go</button> </div> </div> </form> </div> </div> <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/2410.13515">arXiv:2410.13515</a> <span> [<a href="https://arxiv.org/pdf/2410.13515">pdf</a>, <a href="https://arxiv.org/format/2410.13515">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 - 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 Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Observation of a rare beta decay of the charmed baryon with a Graph Neural Network </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-lat?searchtype=author&query=BESIII+Collaboration"> BESIII Collaboration</a>, <a href="/search/hep-lat?searchtype=author&query=Ablikim%2C+M">M. Ablikim</a>, <a href="/search/hep-lat?searchtype=author&query=Achasov%2C+M+N">M. N. Achasov</a>, <a href="/search/hep-lat?searchtype=author&query=Adlarson%2C+P">P. Adlarson</a>, <a href="/search/hep-lat?searchtype=author&query=Afedulidis%2C+O">O. Afedulidis</a>, <a href="/search/hep-lat?searchtype=author&query=Ai%2C+X+C">X. C. Ai</a>, <a href="/search/hep-lat?searchtype=author&query=Aliberti%2C+R">R. Aliberti</a>, <a href="/search/hep-lat?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+Q">Q. An</a>, <a href="/search/hep-lat?searchtype=author&query=Bai%2C+Y">Y. Bai</a>, <a href="/search/hep-lat?searchtype=author&query=Bakina%2C+O">O. Bakina</a>, <a href="/search/hep-lat?searchtype=author&query=Balossino%2C+I">I. Balossino</a>, <a href="/search/hep-lat?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/hep-lat?searchtype=author&query=Bao%2C+H+-">H. -R. Bao</a>, <a href="/search/hep-lat?searchtype=author&query=Batozskaya%2C+V">V. Batozskaya</a>, <a href="/search/hep-lat?searchtype=author&query=Begzsuren%2C+K">K. Begzsuren</a>, <a href="/search/hep-lat?searchtype=author&query=Berger%2C+N">N. Berger</a>, <a href="/search/hep-lat?searchtype=author&query=Berlowski%2C+M">M. Berlowski</a>, <a href="/search/hep-lat?searchtype=author&query=Bertani%2C+M">M. Bertani</a>, <a href="/search/hep-lat?searchtype=author&query=Bettoni%2C+D">D. Bettoni</a>, <a href="/search/hep-lat?searchtype=author&query=Bianchi%2C+F">F. Bianchi</a>, <a href="/search/hep-lat?searchtype=author&query=Bianco%2C+E">E. Bianco</a>, <a href="/search/hep-lat?searchtype=author&query=Bortone%2C+A">A. Bortone</a>, <a href="/search/hep-lat?searchtype=author&query=Boyko%2C+I">I. Boyko</a>, <a href="/search/hep-lat?searchtype=author&query=Briere%2C+R+A">R. A. Briere</a> , et al. (637 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="2410.13515v1-abstract-short" style="display: inline;"> The study of beta decay of the charmed baryon provides unique insights into the fundamental mechanism of the strong and electro-weak interactions. The $螞_c^+$, being the lightest charmed baryon, undergoes disintegration solely through the charm quark weak decay. Its beta decay provides an ideal laboratory for investigating non-perturbative effects in quantum chromodynamics and for constraining the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.13515v1-abstract-full').style.display = 'inline'; document.getElementById('2410.13515v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.13515v1-abstract-full" style="display: none;"> The study of beta decay of the charmed baryon provides unique insights into the fundamental mechanism of the strong and electro-weak interactions. The $螞_c^+$, being the lightest charmed baryon, undergoes disintegration solely through the charm quark weak decay. Its beta decay provides an ideal laboratory for investigating non-perturbative effects in quantum chromodynamics and for constraining the fundamental parameters of the Cabibbo-Kobayashi-Maskawa matrix in weak interaction theory. This article presents the first observation of the Cabibbo-suppressed $螞_c^+$ beta decay into a neutron $螞_c^+ \rightarrow n e^+ 谓_{e}$, based on $4.5~\mathrm{fb}^{-1}$ of electron-positron annihilation data collected with the BESIII detector in the energy region above the $螞^+_c\bar螞^-_c$ threshold. A novel machine learning technique, leveraging Graph Neural Networks, has been utilized to effectively separate signals from dominant backgrounds, particularly $螞_c^+ \rightarrow 螞e^+ 谓_{e}$. This approach has yielded a statistical significance of more than $10蟽$. The absolute branching fraction of $螞_c^+ \rightarrow n e^+ 谓_{e}$ is measured to be $(3.57\pm0.34_{\mathrm{stat}}\pm0.14_{\mathrm{syst}})\times 10^{-3}$. For the first time, the CKM matrix element $\left|V_{cd}\right|$ is extracted via a charmed baryon decay to be $0.208\pm0.011_{\rm exp.}\pm0.007_{\rm LQCD}\pm0.001_{蟿_{螞_c^+}}$. This study provides a new probe to further understand fundamental interactions in the charmed baryon sector, and demonstrates the power of modern machine learning techniques in enhancing experimental capability in high energy physics research. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.13515v1-abstract-full').style.display = 'none'; document.getElementById('2410.13515v1-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 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">28 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/2209.08464">arXiv:2209.08464</a> <span> [<a href="https://arxiv.org/pdf/2209.08464">pdf</a>, <a href="https://arxiv.org/ps/2209.08464">ps</a>, <a href="https://arxiv.org/format/2209.08464">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 - Lattice">hep-lat</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/10.1007/JHEP12(2022)033">10.1007/JHEP12(2022)033 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Partial wave analysis of the charmed baryon hadronic decay $螞_c^+\to螞蟺^+蟺^0$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-lat?searchtype=author&query=BESIII+Collaboration"> BESIII Collaboration</a>, <a href="/search/hep-lat?searchtype=author&query=Ablikim%2C+M">M. Ablikim</a>, <a href="/search/hep-lat?searchtype=author&query=Achasov%2C+M+N">M. N. Achasov</a>, <a href="/search/hep-lat?searchtype=author&query=Adlarson%2C+P">P. Adlarson</a>, <a href="/search/hep-lat?searchtype=author&query=Albrecht%2C+M">M. Albrecht</a>, <a href="/search/hep-lat?searchtype=author&query=Aliberti%2C+R">R. Aliberti</a>, <a href="/search/hep-lat?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+M+R">M. R. An</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+Q">Q. An</a>, <a href="/search/hep-lat?searchtype=author&query=Bai%2C+X+H">X. H. Bai</a>, <a href="/search/hep-lat?searchtype=author&query=Bai%2C+Y">Y. Bai</a>, <a href="/search/hep-lat?searchtype=author&query=Bakina%2C+O">O. Bakina</a>, <a href="/search/hep-lat?searchtype=author&query=Ferroli%2C+R+B">R. Baldini Ferroli</a>, <a href="/search/hep-lat?searchtype=author&query=Balossino%2C+I">I. Balossino</a>, <a href="/search/hep-lat?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/hep-lat?searchtype=author&query=Batozskaya%2C+V">V. Batozskaya</a>, <a href="/search/hep-lat?searchtype=author&query=Becker%2C+D">D. Becker</a>, <a href="/search/hep-lat?searchtype=author&query=Begzsuren%2C+K">K. Begzsuren</a>, <a href="/search/hep-lat?searchtype=author&query=Berger%2C+N">N. Berger</a>, <a href="/search/hep-lat?searchtype=author&query=Bertani%2C+M">M. Bertani</a>, <a href="/search/hep-lat?searchtype=author&query=Bettoni%2C+D">D. Bettoni</a>, <a href="/search/hep-lat?searchtype=author&query=Bianchi%2C+F">F. Bianchi</a>, <a href="/search/hep-lat?searchtype=author&query=Bloms%2C+J">J. Bloms</a>, <a href="/search/hep-lat?searchtype=author&query=Bortone%2C+A">A. Bortone</a>, <a href="/search/hep-lat?searchtype=author&query=Boyko%2C+I">I. Boyko</a> , et al. (555 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="2209.08464v3-abstract-short" style="display: inline;"> Based on $e^+e^-$ collision samples corresponding to an integrated luminosity of 4.4 $\mbox{fb$^{-1}$}$ collected with the BESIII detector at center-of-mass energies between $4.6\,\,\mathrm{GeV}$ and $4.7\,\,\mathrm{GeV}$, a partial wave analysis of the charmed baryon hadronic decay $螞_c^+\to螞蟺^+蟺^0$ is performed, and the decays $螞_c^+\to螞蟻(770)^{+}$ and $螞_c^+\to危(1385)蟺$ are studied for the firs… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.08464v3-abstract-full').style.display = 'inline'; document.getElementById('2209.08464v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.08464v3-abstract-full" style="display: none;"> Based on $e^+e^-$ collision samples corresponding to an integrated luminosity of 4.4 $\mbox{fb$^{-1}$}$ collected with the BESIII detector at center-of-mass energies between $4.6\,\,\mathrm{GeV}$ and $4.7\,\,\mathrm{GeV}$, a partial wave analysis of the charmed baryon hadronic decay $螞_c^+\to螞蟺^+蟺^0$ is performed, and the decays $螞_c^+\to螞蟻(770)^{+}$ and $螞_c^+\to危(1385)蟺$ are studied for the first time. Making use of the world-average branching fraction $\mathcal{B}(螞_c^+\to螞蟺^+蟺^0)$, their branching fractions are determined to be \begin{eqnarray*} \begin{aligned} \mathcal{B}(螞_c^+\to螞蟻(770)^+)=&(4.06\pm0.30\pm0.35\pm0.23)\times10^{-2},\\ \mathcal{B}(螞_c^+\to危(1385)^+蟺^0)=&(5.86\pm0.49\pm0.52\pm0.35)\times10^{-3},\\ \mathcal{B}(螞_c^+\to危(1385)^0蟺^+)=&(6.47\pm0.59\pm0.66\pm0.38)\times10^{-3},\\ \end{aligned} \end{eqnarray*} where the first uncertainties are statistical, the second are systematic, and the third are from the uncertainties of the branching fractions $\mathcal{B}(螞_c^+\to螞蟺^+蟺^0)$ and $\mathcal{B}(危(1385)\to螞蟺)$. In addition, %according to amplitudes determined from the partial wave analysis, the decay asymmetry parameters are measured to be $伪_{螞蟻(770)^+}=-0.763\pm0.053\pm0.045$, $伪_{危(1385)^{+}蟺^0}=-0.917\pm0.069\pm0.056$, and $伪_{危(1385)^{0}蟺^+}=-0.789\pm0.098\pm0.056$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.08464v3-abstract-full').style.display = 'none'; document.getElementById('2209.08464v3-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 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.09131">arXiv:2104.09131</a> <span> [<a href="https://arxiv.org/pdf/2104.09131">pdf</a>, <a href="https://arxiv.org/ps/2104.09131">ps</a>, <a href="https://arxiv.org/format/2104.09131">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 - Lattice">hep-lat</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.104.012006">10.1103/PhysRevD.104.012006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of the decay $D^+\to K^*(892)^+ K_S^0$ in $D^+\to K^+ K_S^0 蟺^0$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-lat?searchtype=author&query=BESIII+Collaboration"> BESIII Collaboration</a>, <a href="/search/hep-lat?searchtype=author&query=Ablikim%2C+M">M. Ablikim</a>, <a href="/search/hep-lat?searchtype=author&query=Achasov%2C+M+N">M. N. Achasov</a>, <a href="/search/hep-lat?searchtype=author&query=Adlarson%2C+P">P. Adlarson</a>, <a href="/search/hep-lat?searchtype=author&query=Ahmed%2C+S">S. Ahmed</a>, <a href="/search/hep-lat?searchtype=author&query=Albrecht%2C+M">M. Albrecht</a>, <a href="/search/hep-lat?searchtype=author&query=Aliberti%2C+R">R. Aliberti</a>, <a href="/search/hep-lat?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+M+R">M. R. An</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+Q">Q. An</a>, <a href="/search/hep-lat?searchtype=author&query=Bai%2C+X+H">X. H. Bai</a>, <a href="/search/hep-lat?searchtype=author&query=Bai%2C+Y">Y. Bai</a>, <a href="/search/hep-lat?searchtype=author&query=Bakina%2C+O">O. Bakina</a>, <a href="/search/hep-lat?searchtype=author&query=Ferroli%2C+R+B">R. Baldini Ferroli</a>, <a href="/search/hep-lat?searchtype=author&query=Balossino%2C+I">I. Balossino</a>, <a href="/search/hep-lat?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/hep-lat?searchtype=author&query=Begzsuren%2C+K">K. Begzsuren</a>, <a href="/search/hep-lat?searchtype=author&query=Berger%2C+N">N. Berger</a>, <a href="/search/hep-lat?searchtype=author&query=Bertani%2C+M">M. Bertani</a>, <a href="/search/hep-lat?searchtype=author&query=Bettoni%2C+D">D. Bettoni</a>, <a href="/search/hep-lat?searchtype=author&query=Bianchi%2C+F">F. Bianchi</a>, <a href="/search/hep-lat?searchtype=author&query=Bloms%2C+J">J. Bloms</a>, <a href="/search/hep-lat?searchtype=author&query=Bortone%2C+A">A. Bortone</a>, <a href="/search/hep-lat?searchtype=author&query=Boyko%2C+I">I. Boyko</a>, <a href="/search/hep-lat?searchtype=author&query=Briere%2C+R+A">R. A. Briere</a> , et al. (492 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="2104.09131v3-abstract-short" style="display: inline;"> Based on an $e^{+}e^{-}$ collision data sample corresponding to an integrated luminosity of 2.93 $\mathrm{fb}^{-1}$ collected with the BESIII detector at $\sqrt{s}=3.773 \mathrm{GeV}$, the first amplitude analysis of the singly Cabibbo-suppressed decay $D^{+}\to K^+ K_S^0 蟺^0$ is performed. From the amplitude analysis, the $K^*(892)^+ K_S^0$ component is found to be dominant with a fraction of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.09131v3-abstract-full').style.display = 'inline'; document.getElementById('2104.09131v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.09131v3-abstract-full" style="display: none;"> Based on an $e^{+}e^{-}$ collision data sample corresponding to an integrated luminosity of 2.93 $\mathrm{fb}^{-1}$ collected with the BESIII detector at $\sqrt{s}=3.773 \mathrm{GeV}$, the first amplitude analysis of the singly Cabibbo-suppressed decay $D^{+}\to K^+ K_S^0 蟺^0$ is performed. From the amplitude analysis, the $K^*(892)^+ K_S^0$ component is found to be dominant with a fraction of $(57.1\pm2.6\pm4.2)\%$, where the first uncertainty is statistical and the second systematic. In combination with the absolute branching fraction $\mathcal{B}(D^+\to K^+ K_S^0 蟺^0)$ measured by BESIII, we obtain $\mathcal{B}(D^+\to K^*(892)^+ K_S^0)=(8.69\pm0.40\pm0.64\pm0.51)\times10^{-3}$, where the third uncertainty is due to the branching fraction $\mathcal{B}(D^+\to K^+ K_S^0 蟺^0)$. The precision of this result is significantly improved compared to the previous measurement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.09131v3-abstract-full').style.display = 'none'; document.getElementById('2104.09131v3-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 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 15 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 104, 012006 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.06496">arXiv:1809.06496</a> <span> [<a href="https://arxiv.org/pdf/1809.06496">pdf</a>, <a href="https://arxiv.org/ps/1809.06496">ps</a>, <a href="https://arxiv.org/format/1809.06496">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 - Lattice">hep-lat</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.122.062001">10.1103/PhysRevLett.122.062001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of $D^+ \to f_0(500) e^+谓_e$ and Improved Measurements of $D \to蟻e^+谓_e$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-lat?searchtype=author&query=Ablikim%2C+M">M. Ablikim</a>, <a href="/search/hep-lat?searchtype=author&query=Achasov%2C+M+N">M. N. Achasov</a>, <a href="/search/hep-lat?searchtype=author&query=Ahmed%2C+S">S. Ahmed</a>, <a href="/search/hep-lat?searchtype=author&query=Albrecht%2C+M">M. Albrecht</a>, <a href="/search/hep-lat?searchtype=author&query=Alekseev%2C+M">M. Alekseev</a>, <a href="/search/hep-lat?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+F+F">F. F. An</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+Q">Q. An</a>, <a href="/search/hep-lat?searchtype=author&query=Bai%2C+Y">Y. Bai</a>, <a href="/search/hep-lat?searchtype=author&query=Bakina%2C+O">O. Bakina</a>, <a href="/search/hep-lat?searchtype=author&query=Ferroli%2C+R+B">R. Baldini Ferroli</a>, <a href="/search/hep-lat?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/hep-lat?searchtype=author&query=Begzsuren%2C+K">K. Begzsuren</a>, <a href="/search/hep-lat?searchtype=author&query=Bennett%2C+D+W">D. W. Bennett</a>, <a href="/search/hep-lat?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a>, <a href="/search/hep-lat?searchtype=author&query=Berger%2C+N">N. Berger</a>, <a href="/search/hep-lat?searchtype=author&query=Bertani%2C+M">M. Bertani</a>, <a href="/search/hep-lat?searchtype=author&query=Bettoni%2C+D">D. Bettoni</a>, <a href="/search/hep-lat?searchtype=author&query=Bianchi%2C+F">F. Bianchi</a>, <a href="/search/hep-lat?searchtype=author&query=Boger%2C+E">E. Boger</a>, <a href="/search/hep-lat?searchtype=author&query=Boyko%2C+I">I. Boyko</a>, <a href="/search/hep-lat?searchtype=author&query=Briere%2C+R+A">R. A. Briere</a>, <a href="/search/hep-lat?searchtype=author&query=Cai%2C+H">H. Cai</a>, <a href="/search/hep-lat?searchtype=author&query=Cai%2C+X">X. Cai</a>, <a href="/search/hep-lat?searchtype=author&query=Calcaterra%2C+A">A. Calcaterra</a> , et al. (438 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="1809.06496v2-abstract-short" style="display: inline;"> Using a data sample corresponding to an integrated luminosity of 2.93~fb$^{-1}$ recorded by the BESIII detector at a center-of-mass energy of $3.773$ GeV, we present an analysis of the decays $\bar{D}^0\to蟺^+蟺^0 e^-\bar谓_e$ and $D^+\to蟺^-蟺^+ e^+谓_e$. By performing a partial wave analysis, the $蟺^+蟺^-$ $S$-wave contribution to $D^+\to蟺^-蟺^+ e^+谓_e$ is observed to be $(25.7\pm1.6\pm1.1)$% with a sta… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.06496v2-abstract-full').style.display = 'inline'; document.getElementById('1809.06496v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.06496v2-abstract-full" style="display: none;"> Using a data sample corresponding to an integrated luminosity of 2.93~fb$^{-1}$ recorded by the BESIII detector at a center-of-mass energy of $3.773$ GeV, we present an analysis of the decays $\bar{D}^0\to蟺^+蟺^0 e^-\bar谓_e$ and $D^+\to蟺^-蟺^+ e^+谓_e$. By performing a partial wave analysis, the $蟺^+蟺^-$ $S$-wave contribution to $D^+\to蟺^-蟺^+ e^+谓_e$ is observed to be $(25.7\pm1.6\pm1.1)$% with a statistical significance greater than 10$蟽$, besides the dominant $P$-wave contribution. This is the first observation of the $S$-wave contribution. We measure the branching fractions $\mathcal{B}(D^{0} \to 蟻^- e^+ 谓_e) = (1.445\pm 0.058 \pm 0.039) \times10^{-3}$, $\mathcal{B}(D^{+} \to 蟻^0 e^+ 谓_e) = (1.860\pm 0.070 \pm 0.061) \times10^{-3}$, and $\mathcal{B}(D^{+} \to f_0(500) e^+ 谓_e, f_0(500)\to蟺^+蟺^-) = (6.30\pm 0.43 \pm 0.32) \times10^{-4}$. An upper limit of $\mathcal{B}(D^{+} \to f_0(980) e^+ 谓_e, f_0(980)\to蟺^+蟺^-) < 2.8 \times10^{-5}$ is set at the 90% confidence level. We also obtain the hadronic form factor ratios of $D\to 蟻e^+谓_e$ at $q^{2}=0$ assuming the single-pole dominance parameterization: $r_{V}=\frac{V(0)}{A_{1}(0)}=1.695\pm0.083\pm0.051$, $r_{2}=\frac{A_{2}(0)}{A_{1}(0)}=0.845\pm0.056\pm0.039$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.06496v2-abstract-full').style.display = 'none'; document.getElementById('1809.06496v2-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 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 122, 062001 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1308.2760">arXiv:1308.2760</a> <span> [<a href="https://arxiv.org/pdf/1308.2760">pdf</a>, <a href="https://arxiv.org/ps/1308.2760">ps</a>, <a href="https://arxiv.org/format/1308.2760">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 - Lattice">hep-lat</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.112.132001">10.1103/PhysRevLett.112.132001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of a charged charmoniumlike structure in $e^+e^- \to (D^{*} \bar{D}^{*})^{\pm} 蟺^\mp$ at $\sqrt{s}=4.26$GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-lat?searchtype=author&query=BESIII+collaboration"> BESIII collaboration</a>, <a href="/search/hep-lat?searchtype=author&query=Ablikim%2C+M">M. Ablikim</a>, <a href="/search/hep-lat?searchtype=author&query=Achasov%2C+M+N">M. N. Achasov</a>, <a href="/search/hep-lat?searchtype=author&query=Albayrak%2C+O">O. Albayrak</a>, <a href="/search/hep-lat?searchtype=author&query=Ambrose%2C+D+J">D. J. Ambrose</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+F+F">F. F. An</a>, <a href="/search/hep-lat?searchtype=author&query=An%2C+Q">Q. An</a>, <a href="/search/hep-lat?searchtype=author&query=Bai%2C+J+Z">J. Z. Bai</a>, <a href="/search/hep-lat?searchtype=author&query=Ferroli%2C+R+B">R. Baldini Ferroli</a>, <a href="/search/hep-lat?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/hep-lat?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-lat?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a>, <a href="/search/hep-lat?searchtype=author&query=Bertani%2C+M">M. Bertani</a>, <a href="/search/hep-lat?searchtype=author&query=Bian%2C+J+M">J. M. Bian</a>, <a href="/search/hep-lat?searchtype=author&query=Boger%2C+E">E. Boger</a>, <a href="/search/hep-lat?searchtype=author&query=Bondarenko%2C+O">O. Bondarenko</a>, <a href="/search/hep-lat?searchtype=author&query=Boyko%2C+I">I. Boyko</a>, <a href="/search/hep-lat?searchtype=author&query=Braun%2C+S">S. Braun</a>, <a href="/search/hep-lat?searchtype=author&query=Briere%2C+R+A">R. A. Briere</a>, <a href="/search/hep-lat?searchtype=author&query=Bytev%2C+V">V. Bytev</a>, <a href="/search/hep-lat?searchtype=author&query=Cai%2C+H">H. Cai</a>, <a href="/search/hep-lat?searchtype=author&query=Cai%2C+X">X. Cai</a>, <a href="/search/hep-lat?searchtype=author&query=Cakir%2C+O">O. Cakir</a>, <a href="/search/hep-lat?searchtype=author&query=Calcaterra%2C+A">A. Calcaterra</a>, <a href="/search/hep-lat?searchtype=author&query=Cao%2C+G+F">G. F. Cao</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="1308.2760v2-abstract-short" style="display: inline;"> We study the process $e^+e^- \to (D^{*} \bar{D}^{*})^{\pm} 蟺^\mp$ at a center-of-mass energy of 4.26GeV using a 827pb$^{-1}$ data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be $(137\pm9\pm15)$pb. We observe a structure near the $(D^{*} \bar{D}^{*})^{\pm}$ threshold in the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1308.2760v2-abstract-full').style.display = 'inline'; document.getElementById('1308.2760v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1308.2760v2-abstract-full" style="display: none;"> We study the process $e^+e^- \to (D^{*} \bar{D}^{*})^{\pm} 蟺^\mp$ at a center-of-mass energy of 4.26GeV using a 827pb$^{-1}$ data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be $(137\pm9\pm15)$pb. We observe a structure near the $(D^{*} \bar{D}^{*})^{\pm}$ threshold in the $蟺^\mp$ recoil mass spectrum, which we denote as the $Z^{\pm}_c(4025)$. The measured mass and width of the structure are $(4026.3\pm2.6\pm3.7)$MeV/c$^2$ and $(24.8\pm5.6\pm7.7)$MeV, respectively. Its production ratio $\frac{蟽(e^+e^-\to Z^{\pm}_c(4025)蟺^\mp \to (D^{*} \bar{D}^{*})^{\pm} 蟺^\mp)}{蟽(e^+e^-\to (D^{*} \bar{D}^{*})^{\pm} 蟺^\mp)}$ is determined to be $0.65\pm0.09\pm0.06$. The first uncertainties are statistical and the second are systematic. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1308.2760v2-abstract-full').style.display = 'none'; document.getElementById('1308.2760v2-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 February, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 August, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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, 4 figures, 1 table; version accepted to be published in PRL</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, 132001 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0809.1869">arXiv:0809.1869</a> <span> [<a href="https://arxiv.org/pdf/0809.1869">pdf</a>, <a href="https://arxiv.org/ps/0809.1869">ps</a>, <a href="https://arxiv.org/format/0809.1869">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 - Lattice">hep-lat</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Physics at BES-III </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-lat?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-lat?searchtype=author&query=Barnes%2C+T">T. Barnes</a>, <a href="/search/hep-lat?searchtype=author&query=Bian%2C+J+M">J. M. Bian</a>, <a href="/search/hep-lat?searchtype=author&query=Bigi%2C+I+I">I. I. Bigi</a>, <a href="/search/hep-lat?searchtype=author&query=Brambilla%2C+N">N. Brambilla</a>, <a href="/search/hep-lat?searchtype=author&query=Boyko%2C+I+R">I. R. Boyko</a>, <a href="/search/hep-lat?searchtype=author&query=Bytev%2C+V">V. Bytev</a>, <a href="/search/hep-lat?searchtype=author&query=Chao%2C+K+T">K. T. Chao</a>, <a href="/search/hep-lat?searchtype=author&query=Charles%2C+J">J. Charles</a>, <a href="/search/hep-lat?searchtype=author&query=Chen%2C+H+X">H. X. Chen</a>, <a href="/search/hep-lat?searchtype=author&query=Chen%2C+J+C">J. C. Chen</a>, <a href="/search/hep-lat?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/hep-lat?searchtype=author&query=Chen%2C+Y+Q">Y. Q. Chen</a>, <a href="/search/hep-lat?searchtype=author&query=Cheng%2C+H+Y">H. Y. Cheng</a>, <a href="/search/hep-lat?searchtype=author&query=Dedovich%2C+D">D. Dedovich</a>, <a href="/search/hep-lat?searchtype=author&query=Descotes-Genon%2C+S">S. Descotes-Genon</a>, <a href="/search/hep-lat?searchtype=author&query=Fu%2C+C+D">C. D. Fu</a>, <a href="/search/hep-lat?searchtype=author&query=Tormo%2C+X+G+i">X. Garcia i Tormo</a>, <a href="/search/hep-lat?searchtype=author&query=Gao%2C+Y+-">Y. -N. Gao</a>, <a href="/search/hep-lat?searchtype=author&query=He%2C+K+L">K. L. He</a>, <a href="/search/hep-lat?searchtype=author&query=He%2C+Z+G">Z. G. He</a>, <a href="/search/hep-lat?searchtype=author&query=Hu%2C+J+F">J. F. Hu</a>, <a href="/search/hep-lat?searchtype=author&query=Hu%2C+H+M">H. M. Hu</a>, <a href="/search/hep-lat?searchtype=author&query=Huang%2C+B">B. Huang</a>, <a href="/search/hep-lat?searchtype=author&query=Jia%2C+Y">Y. Jia</a> , et al. (60 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="0809.1869v1-abstract-short" style="display: inline;"> This physics book provides detailed discussions on important topics in $蟿$-charm physics that will be explored during the next few years at \bes3 . Both theoretical and experimental issues are covered, including extensive reviews of recent theoretical developments and experimental techniques. Among the subjects covered are: innovations in Partial Wave Analysis (PWA), theoretical and experimental… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0809.1869v1-abstract-full').style.display = 'inline'; document.getElementById('0809.1869v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0809.1869v1-abstract-full" style="display: none;"> This physics book provides detailed discussions on important topics in $蟿$-charm physics that will be explored during the next few years at \bes3 . Both theoretical and experimental issues are covered, including extensive reviews of recent theoretical developments and experimental techniques. Among the subjects covered are: innovations in Partial Wave Analysis (PWA), theoretical and experimental techniques for Dalitz-plot analyses, analysis tools to extract absolute branching fractions and measurements of decay constants, form factors, and CP-violation and \DzDzb-oscillation parameters. Programs of QCD studies and near-threshold tau-lepton physics measurements are also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0809.1869v1-abstract-full').style.display = 'none'; document.getElementById('0809.1869v1-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 September, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2008. </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">Edited by Kuang-Ta Chao and Yi-Fang Wang</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> IHEP-Physics-Report-BES-III-2008-001 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> International Journal of Modern Physics A Volume: 24, Issue: 1 supp (2009) </p> </li> </ol> <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"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 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