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class="pagination-link " aria-label="Page 5" aria-current="page">5 </a> </li> <li> <a href="/search/?searchtype=author&query=Babu%2C+V&start=250" class="pagination-link " aria-label="Page 6" aria-current="page">6 </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/2411.14032">arXiv:2411.14032</a> <span> [<a href="https://arxiv.org/pdf/2411.14032">pdf</a>, <a href="https://arxiv.org/format/2411.14032">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> </div> </div> <p class="title is-5 mathjax"> Measurement of the inclusive branching fractions for $B_s^0$ decays into $D$ mesons via hadronic tagging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baghel%2C+N+K">N. K. Baghel</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a> , et al. (430 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="2411.14032v1-abstract-short" style="display: inline;"> We report measurements of the absolute branching fractions $\mathcal{B}(B_s^0 \to D_s^{\pm} X)$, $\mathcal{B}(B_s^0 \to D^0/\bar{D}^0 X)$, and $\mathcal{B}(B_s^0 \to D^{\pm} X)$, where the latter is measured for the first time. The results are based on a 121.4\,fb$^{-1}$ data sample collected at the $违(10860)$ resonance by the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We rec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.14032v1-abstract-full').style.display = 'inline'; document.getElementById('2411.14032v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.14032v1-abstract-full" style="display: none;"> We report measurements of the absolute branching fractions $\mathcal{B}(B_s^0 \to D_s^{\pm} X)$, $\mathcal{B}(B_s^0 \to D^0/\bar{D}^0 X)$, and $\mathcal{B}(B_s^0 \to D^{\pm} X)$, where the latter is measured for the first time. The results are based on a 121.4\,fb$^{-1}$ data sample collected at the $违(10860)$ resonance by the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We reconstruct one $B_s^0$ meson in $e^+e^- \to 违(10860) \to B_s^{*} \bar{B}_s^{*}$ events and measure yields of $D_s^+$, $D^0$, and $D^+$ mesons in the rest of the event. We obtain $\mathcal{B}(B_s^0 \to D_s^{\pm} X) = (68.6 \pm 7.2 \pm 4.0)\%$, $\mathcal{B}(B_s^0 \to D^0/\bar{D}^0 X) = (21.5 \pm 6.1 \pm 1.8)\%$, and $\mathcal{B}(B_s^0 \to D^{\pm} X) = (12.6 \pm 4.6 \pm 1.3)\%$, where the first uncertainty is statistical and the second is systematic. Averaging with previous Belle measurements gives $\mathcal{B}(B_s^0 \to D_s^{\pm} X) = (63.4 \pm 4.5 \pm 2.2)\%$ and $\mathcal{B}(B_s^0 \to D^0/\bar{D}^0 X) = (23.9 \pm 4.1 \pm 1.8)\%$. For the $B_s^0$ production fraction at the $违(10860)$, we find $f_s = (21.4^{+1.5}_{-1.7})\%$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.14032v1-abstract-full').style.display = 'none'; document.getElementById('2411.14032v1-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">23 pages, 9 figures, submitted to JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-030, KEK Preprint 2024-32 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.10127">arXiv:2411.10127</a> <span> [<a href="https://arxiv.org/pdf/2411.10127">pdf</a>, <a href="https://arxiv.org/format/2411.10127">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> </div> </div> <p class="title is-5 mathjax"> Measurement of $B \to K{}^{*}(892)纬$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baghel%2C+N+K">N. K. Baghel</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Bartl%2C+M">M. Bartl</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a> , et al. (429 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="2411.10127v1-abstract-short" style="display: inline;"> We present measurements of $B \to K{}^{*}(892)纬$ decays using $365\,{\rm fb}^{-1}$ of data collected from 2019 to 2022 by the Belle~II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider. The data sample contains $(387 \pm 6) \times 10^6$ $B\overline{B}$ events. We measure branching fractions ($\mathcal{B}$) and $C\!P$ asymmetries ($\mathcal{A}_{C\!P}$) for both $B^{0}\to K{}^{*0}纬$ an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.10127v1-abstract-full').style.display = 'inline'; document.getElementById('2411.10127v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.10127v1-abstract-full" style="display: none;"> We present measurements of $B \to K{}^{*}(892)纬$ decays using $365\,{\rm fb}^{-1}$ of data collected from 2019 to 2022 by the Belle~II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider. The data sample contains $(387 \pm 6) \times 10^6$ $B\overline{B}$ events. We measure branching fractions ($\mathcal{B}$) and $C\!P$ asymmetries ($\mathcal{A}_{C\!P}$) for both $B^{0}\to K{}^{*0}纬$ and $B^{+}\to K{}^{*+}纬$ decays. The difference in $C\!P$ asymmetries ($螖\mathcal{A}_{C\!P}$) and the isospin asymmetry ($螖_{0+}$) between these neutral and charged channels are also measured. We obtain the following branching fractions and $C\!P$ asymmetries: $\mathcal{B} (B^{0} \to K{}^{*0}纬) = (4.14 \pm 0.10 \pm 0.11 ) \times 10^{-5}$, $\mathcal{B} (B^{+} \to K{}^{*+}纬) = (4.02 \pm 0.13 \pm 0.13 )\times 10^{-5}$, $\mathcal{A}_{C\!P} (B^{0} \to K{}^{*0}纬) = (-3.3 \pm 2.3 \pm 0.4 )\%$, and $\mathcal{A}_{C\!P} (B^{+} \to K{}^{*+}纬) = (-0.7 \pm 2.9 \pm 0.6 )\%$. The measured difference in $C\!P$ asymmetries is $螖\mathcal{A}_{C\!P} = (+2.6 \pm 3.8 \pm 0.7 )\%$, and the measured isospin asymmetry is $螖_{0+} = (+5.0 \pm 2.0 \pm 1.5 )\%$. The first uncertainties listed are statistical and the second are systematic. These results are consistent with world-average values and theory predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.10127v1-abstract-full').style.display = 'none'; document.getElementById('2411.10127v1-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-029; KEK Preprint 2024-31 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.00306">arXiv:2411.00306</a> <span> [<a href="https://arxiv.org/pdf/2411.00306">pdf</a>, <a href="https://arxiv.org/format/2411.00306">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> </div> </div> <p class="title is-5 mathjax"> Measurement of the time-integrated CP asymmetry in $D^{0}\rightarrow K^{0}_{S}K^{0}_{S}$ decays using Belle and Belle II data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Baghel%2C+N+K">N. K. Baghel</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Bartl%2C+M">M. Bartl</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a> , et al. (338 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="2411.00306v2-abstract-short" style="display: inline;"> We measure the time-integrated CP asymmetry in $D^{0} \rightarrow K^{0}_{S}K^{0}_{S}$ decays reconstructed in $e^{+}e^{-} \rightarrow c\overline{c}$ events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 fb$^{-1}$ and 428 fb$^{-1}$, respectively. The $D^{0}$ decays are required to originate from the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.00306v2-abstract-full').style.display = 'inline'; document.getElementById('2411.00306v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.00306v2-abstract-full" style="display: none;"> We measure the time-integrated CP asymmetry in $D^{0} \rightarrow K^{0}_{S}K^{0}_{S}$ decays reconstructed in $e^{+}e^{-} \rightarrow c\overline{c}$ events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 fb$^{-1}$ and 428 fb$^{-1}$, respectively. The $D^{0}$ decays are required to originate from the $D^{*+} \rightarrow D^{0}蟺^{+}$ decay, which determines the charm flavor at production time. A control sample of $D^{0} \rightarrow K^{+}K^{-}$ decays is used to correct for production and detection asymmetries. The result, $(-1.4\pm1.3{\rm(stat)}\pm0.1{\rm (syst)})\%$, is consistent with previous determinations and with CP symmetry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.00306v2-abstract-full').style.display = 'none'; document.getElementById('2411.00306v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">10 pages, 3 figures. arXiv admin note: text overlap with arXiv:2410.22961</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KEK Preprint 2024-26, Belle II Preprint 2024-026 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2410.08622">arXiv:2410.08622</a> <span> [<a href="https://arxiv.org/pdf/2410.08622">pdf</a>, <a href="https://arxiv.org/ps/2410.08622">ps</a>, <a href="https://arxiv.org/format/2410.08622">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> </div> </div> <p class="title is-5 mathjax"> Observation of time-dependent $CP$ violation and measurement of the branching fraction of $B^0 \to J/蠄蟺^0$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baghel%2C+N+K">N. K. Baghel</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (369 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2410.08622v1-abstract-short" style="display: inline;"> We present a measurement of the branching fraction and time-dependent charge-parity ($CP$) decay-rate asymmetries in $B^0 \to J/蠄蟺^0$ decays. The data sample was collected with the Belle~II detector at the SuperKEKB asymmetric $e^+e^-$ collider in 2019-2022 and contains $(387\pm 6)\times 10^6$ $B\overline{B}$ meson pairs from $违(4S)$ decays. We reconstruct $392\pm 24$ signal decays and fit the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.08622v1-abstract-full').style.display = 'inline'; document.getElementById('2410.08622v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.08622v1-abstract-full" style="display: none;"> We present a measurement of the branching fraction and time-dependent charge-parity ($CP$) decay-rate asymmetries in $B^0 \to J/蠄蟺^0$ decays. The data sample was collected with the Belle~II detector at the SuperKEKB asymmetric $e^+e^-$ collider in 2019-2022 and contains $(387\pm 6)\times 10^6$ $B\overline{B}$ meson pairs from $违(4S)$ decays. We reconstruct $392\pm 24$ signal decays and fit the $CP$ parameters from the distribution of the proper-decay-time difference of the two $B$ mesons. We measure the branching fraction to be $B(B^0 \to J/蠄蟺^0)=(2.02 \pm 0.12 \pm 0.10)\times 10^{-5}$ and the direct and mixing-induced $CP$ asymmetries to be $C_{CP}=0.13 \pm 0.12 \pm 0.03$ and $S_{CP}=-0.88 \pm 0.17 \pm 0.03$, respectively, where the first uncertainties are statistical and the second are systematic. We observe mixing-induced $CP$ violation with a significance of $5.0$ standard deviations for the first time in this mode. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.08622v1-abstract-full').style.display = 'none'; document.getElementById('2410.08622v1-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 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">Report number:</span> Belle II preprint: 2024-018, KEK preprint: 2024-14 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.15777">arXiv:2409.15777</a> <span> [<a href="https://arxiv.org/pdf/2409.15777">pdf</a>, <a href="https://arxiv.org/format/2409.15777">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> </div> </div> <p class="title is-5 mathjax"> Search for $C\!P$ violation in $D^+_{(s)}\to{}K_{S}^{0}K^{-}蟺^{+}蟺^{+}$ decays using triple and quadruple products </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baghel%2C+N+K">N. K. Baghel</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (344 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="2409.15777v1-abstract-short" style="display: inline;"> We perform the first search for $C\!P$ violation in ${D_{(s)}^{+}\to{}K_{S}^{0}K^{-}蟺^{+}蟺^{+}}$ decays. We use a combined data set from the Belle and Belle II experiments, which study $e^+e^-$ collisions at center-of-mass energies at or near the $违(4S)$ resonance. We use 980 fb$^{-1}$ of data from Belle and 428 fb$^{-1}$ of data from Belle~II. We measure six $C\!P$-violating asymmetries that are… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.15777v1-abstract-full').style.display = 'inline'; document.getElementById('2409.15777v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.15777v1-abstract-full" style="display: none;"> We perform the first search for $C\!P$ violation in ${D_{(s)}^{+}\to{}K_{S}^{0}K^{-}蟺^{+}蟺^{+}}$ decays. We use a combined data set from the Belle and Belle II experiments, which study $e^+e^-$ collisions at center-of-mass energies at or near the $违(4S)$ resonance. We use 980 fb$^{-1}$ of data from Belle and 428 fb$^{-1}$ of data from Belle~II. We measure six $C\!P$-violating asymmetries that are based on triple products and quadruple products of the momenta of final-state particles, and also the particles' helicity angles. We obtain a precision at the level of 0.5% for $D^+\to{}K_{S}^{0}K^{-}蟺^{+}蟺^{+}$ decays, and better than 0.3% for $D^+_{s}\to{}K_{S}^{0}K^{-}蟺^{+}蟺^{+}$ decays. No evidence of $C\!P$ violation is found. Our results for the triple-product asymmetries are the most precise to date for singly-Cabibbo-suppressed $D^+$ decays. Our results for the other asymmetries are the first such measurements performed for charm decays. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.15777v1-abstract-full').style.display = 'none'; document.getElementById('2409.15777v1-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 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">21 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-025, KEK Preprint 2024-24, UCHEP-24-05 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.17403">arXiv:2407.17403</a> <span> [<a href="https://arxiv.org/pdf/2407.17403">pdf</a>, <a href="https://arxiv.org/format/2407.17403">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> </div> </div> <p class="title is-5 mathjax"> Determination of $|V_{ub}|$ from simultaneous measurements of untagged $B^0\to蟺^- \ell^+ 谓_{\ell}$ and $B^+\to蟻^0 \ell^+谓_{\ell}$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (395 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="2407.17403v1-abstract-short" style="display: inline;"> We present a measurement of $|V_{ub}|$ from a simultaneous study of the charmless semileptonic decays $B^0\to蟺^- \ell^+ 谓_{\ell}$ and $B^+\to蟻^0 \ell^+谓_{\ell}$, where $\ell = e, 渭$. This measurement uses a data sample of 387 million $B\overline{B}$ meson pairs recorded by the Belle~II detector at the SuperKEKB electron-positron collider between 2019 and 2022. The two decays are reconstructed with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.17403v1-abstract-full').style.display = 'inline'; document.getElementById('2407.17403v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.17403v1-abstract-full" style="display: none;"> We present a measurement of $|V_{ub}|$ from a simultaneous study of the charmless semileptonic decays $B^0\to蟺^- \ell^+ 谓_{\ell}$ and $B^+\to蟻^0 \ell^+谓_{\ell}$, where $\ell = e, 渭$. This measurement uses a data sample of 387 million $B\overline{B}$ meson pairs recorded by the Belle~II detector at the SuperKEKB electron-positron collider between 2019 and 2022. The two decays are reconstructed without identifying the partner $B$ mesons. We simultaneously measure the differential branching fractions of $B^0\to蟺^- \ell^+ 谓_{\ell}$ and $B^+\to蟻^0 \ell^+谓_{\ell}$ decays as functions of $q^2$ (momentum transfer squared). From these, we obtain total branching fractions $B(B^0\to蟺^- \ell^+ 谓_{\ell}) = (1.516 \pm 0.042 (\mathrm{stat}) \pm 0.059 (\mathrm{syst})) \times 10^{-4}$ and $B(B^+\to蟻^0 \ell^+谓_{\ell}) = (1.625 \pm 0.079 (\mathrm{stat}) \pm 0.180 (\mathrm{syst})) \times 10^{-4}$. By fitting the measured $B^0\to蟺^- \ell^+ 谓_{\ell}$ partial branching fractions as functions of $q^2$, together with constraints on the non-perturbative hadronic contribution from lattice QCD calculations, we obtain $|V_{ub}|$ = $(3.93 \pm 0.09 \pm 0.13 \pm 0.19) \times 10^{-3}$. Here, the first uncertainty is statistical, the second is systematic, and the third is theoretical. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.17403v1-abstract-full').style.display = 'none'; document.getElementById('2407.17403v1-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-023, KEK Preprint 2024-21 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.09139">arXiv:2407.09139</a> <span> [<a href="https://arxiv.org/pdf/2407.09139">pdf</a>, <a href="https://arxiv.org/format/2407.09139">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> </div> </div> <p class="title is-5 mathjax"> Measurement of $CP$ asymmetries in $B^0 \to K^0_S 蟺^0 纬$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (414 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="2407.09139v1-abstract-short" style="display: inline;"> We report measurements of time-dependent $CP$ asymmetries in $B^0 \to K^0_S 蟺^0 纬$ decays based on a data sample of $(388\pm6)\times10^6$ $B\bar{B}$ events collected at the $违(4S)$ resonance with the Belle II detector. The Belle II experiment operates at the SuperKEKB asymmetric-energy $e^+e^-$ collider. We measure decay-time distributions to determine $CP$-violating parameters $S$ and $C$. We det… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09139v1-abstract-full').style.display = 'inline'; document.getElementById('2407.09139v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.09139v1-abstract-full" style="display: none;"> We report measurements of time-dependent $CP$ asymmetries in $B^0 \to K^0_S 蟺^0 纬$ decays based on a data sample of $(388\pm6)\times10^6$ $B\bar{B}$ events collected at the $违(4S)$ resonance with the Belle II detector. The Belle II experiment operates at the SuperKEKB asymmetric-energy $e^+e^-$ collider. We measure decay-time distributions to determine $CP$-violating parameters $S$ and $C$. We determine these parameters for two ranges of $K^0_S 蟺^0$ invariant mass: $m(K^0_S 蟺^0)\in (0.8, 1.0)$ $GeV/c^2$, which is dominated by $B^0 \to K^{*0} (\to K^0_S 蟺^0) 纬$ decays, and a complementary region $m(K^0_S 蟺^0)\in (0.6, 0.8)\cup(1.0, 1.8)$ $GeV/c^2$. Our results have improved precision as compared to previous measurements and are consistent with theory predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09139v1-abstract-full').style.display = 'none'; document.getElementById('2407.09139v1-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">10 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-009, KEK Preprint 2024-1 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.08984">arXiv:2407.08984</a> <span> [<a href="https://arxiv.org/pdf/2407.08984">pdf</a>, <a href="https://arxiv.org/ps/2407.08984">ps</a>, <a href="https://arxiv.org/format/2407.08984">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> </div> </div> <p class="title is-5 mathjax"> Measurement of branching fractions, CP asymmetry, and isospin asymmetry for $\boldsymbol{B\rightarrow蟻纬}$ decays using Belle and Belle II data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (385 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="2407.08984v1-abstract-short" style="display: inline;"> We present measurements of $B^{+}\rightarrow蟻^{+}纬$ and $B^{0}\rightarrow蟻^{0}纬$ decays using a combined data sample of $772 \times 10^6$ $B\overline{B}$ pairs collected by the Belle experiment and $387\times 10^6$ $B\overline{B}$ pairs collected by the Belle II experiment in $e^{+}e^{-}$ collisions at the $违(4S)$ resonance. After an optimized selection, a simultaneous fit to the Belle and Belle I… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.08984v1-abstract-full').style.display = 'inline'; document.getElementById('2407.08984v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.08984v1-abstract-full" style="display: none;"> We present measurements of $B^{+}\rightarrow蟻^{+}纬$ and $B^{0}\rightarrow蟻^{0}纬$ decays using a combined data sample of $772 \times 10^6$ $B\overline{B}$ pairs collected by the Belle experiment and $387\times 10^6$ $B\overline{B}$ pairs collected by the Belle II experiment in $e^{+}e^{-}$ collisions at the $违(4S)$ resonance. After an optimized selection, a simultaneous fit to the Belle and Belle II data sets yields $114\pm 12$ $B^{+}\rightarrow蟻^{+}纬$ and $99\pm 12$ $B^{0}\rightarrow蟻^{0}纬$ decays. The measured branching fractions are $(13.1^{+2.0 +1.3}_{-1.9 -1.2})\times 10^{-7}$ and $(7.5\pm 1.3^{+1.0}_{-0.8})\times 10^{-7}$ for $B^{+}\rightarrow蟻^{+}纬$ and $B^{0}\rightarrow蟻^{0}纬$ decays, respectively, where the first uncertainty is statistical and the second is systematic. We also measure the isospin asymmetry $A_{\rm I}(B\rightarrow蟻纬)=(10.9^{+11.2 +7.8}_{-11.7 -7.3})\%$ and the direct CP asymmetry $A_{CP}(B^{+}\rightarrow蟻^{+}纬)=(-8.2\pm 15.2^{+1.6}_{-1.2})\%$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.08984v1-abstract-full').style.display = 'none'; document.getElementById('2407.08984v1-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">12 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-019; KEK Preprint 2023-37; UCHEP-24-04 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.05117">arXiv:2407.05117</a> <span> [<a href="https://arxiv.org/pdf/2407.05117">pdf</a>, <a href="https://arxiv.org/ps/2407.05117">ps</a>, <a href="https://arxiv.org/format/2407.05117">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> </div> </div> <p class="title is-5 mathjax"> Search for the baryon number and lepton number violating decays $蟿^-\to 螞蟺^-$ and $蟿^-\to \bar螞蟺^-$ at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (349 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="2407.05117v1-abstract-short" style="display: inline;"> We present a search for the baryon number $B$ and lepton number $L$ violating decays $蟿^- \rightarrow 螞蟺^-$ and $蟿^- \rightarrow \bar螞蟺^-$ produced from the $e^+e^-\to 蟿^+蟿^-$ process, using a 364 fb$^{-1}$ data sample collected by the Belle~II experiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which have $|螖(B-L)|$ equal to $2$ and $0$, respectively. Upper… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.05117v1-abstract-full').style.display = 'inline'; document.getElementById('2407.05117v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.05117v1-abstract-full" style="display: none;"> We present a search for the baryon number $B$ and lepton number $L$ violating decays $蟿^- \rightarrow 螞蟺^-$ and $蟿^- \rightarrow \bar螞蟺^-$ produced from the $e^+e^-\to 蟿^+蟿^-$ process, using a 364 fb$^{-1}$ data sample collected by the Belle~II experiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which have $|螖(B-L)|$ equal to $2$ and $0$, respectively. Upper limits at 90\% credibility level on the branching fractions of $蟿^- \rightarrow 螞蟺^-$ and $蟿^- \rightarrow \bar螞蟺^-$ are determined to be $4.7 \times 10^{-8}$ and $4.3 \times 10^{-8}$, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.05117v1-abstract-full').style.display = 'none'; document.getElementById('2407.05117v1-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">8 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-020; KEK Preprint 2024-17 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.03783">arXiv:2407.03783</a> <span> [<a href="https://arxiv.org/pdf/2407.03783">pdf</a>, <a href="https://arxiv.org/format/2407.03783">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> </div> </div> <p class="title is-5 mathjax"> Evidence of $h_{b}(\text{2P}) \to 违(\text{1S})畏$ decay and search for $h_{b}(\text{1P,2P}) \to 违(\text{1S})蟺^0$ with the Belle detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Kovalenko%2C+E">E. Kovalenko</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bondar%2C+A">A. Bondar</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Browder%2C+T+E">T. E. Browder</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Campajola%2C+M">M. Campajola</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+M+-">M. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Cheon%2C+B+G">B. G. Cheon</a> , et al. (142 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="2407.03783v1-abstract-short" style="display: inline;"> We report the first evidence for the $h_{b}(\text{2P}) \to 违(\text{1S})畏$ transition with a significance of $3.5$ standard deviations. The decay branching fraction is measured to be $\mathcal{B}[h_{b}(\text{2P}) \to 违(\text{1S})畏]=(7.1 ~^{+3.7} _{-3.2}\pm 0.8)\times10^{-3}$, which is noticeably smaller than expected. We also set upper limits on $蟺^0$ transitions of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.03783v1-abstract-full').style.display = 'inline'; document.getElementById('2407.03783v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.03783v1-abstract-full" style="display: none;"> We report the first evidence for the $h_{b}(\text{2P}) \to 违(\text{1S})畏$ transition with a significance of $3.5$ standard deviations. The decay branching fraction is measured to be $\mathcal{B}[h_{b}(\text{2P}) \to 违(\text{1S})畏]=(7.1 ~^{+3.7} _{-3.2}\pm 0.8)\times10^{-3}$, which is noticeably smaller than expected. We also set upper limits on $蟺^0$ transitions of $\mathcal{B}[h_{b}(\text{2P}) \to 违(\text{1S})蟺^0] < 1.8\times10^{-3}$, and $\mathcal{B}[h_{b}(\text{1P})\to 违(\text{1S})蟺^0] < 1.8\times10^{-3}$, at the $90\%$ confidence level. These results are obtained with a $131.4$~fb$^{-1}$ data sample collected near the $违(\text{5S})$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.03783v1-abstract-full').style.display = 'none'; document.getElementById('2407.03783v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">to be submitted to PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2024-03, KEK Preprint 2024-03 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.00965">arXiv:2407.00965</a> <span> [<a href="https://arxiv.org/pdf/2407.00965">pdf</a>, <a href="https://arxiv.org/format/2407.00965">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> </div> </div> <p class="title is-5 mathjax"> Measurement of the integrated luminosity of data samples collected during 2019-2022 by the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Belle+II+Collaboration"> The Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+J+K">J. K. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (382 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="2407.00965v2-abstract-short" style="display: inline;"> A series of data samples was collected with the Belle~II detector at the SuperKEKB collider from March 2019 to June 2022. We determine the integrated luminosities of these data samples using three distinct methodologies involving Bhabha ($e^+e^- \to e^+e^-(n纬)$), digamma ($e^+e^- \to 纬纬(n纬)$), and dimuon ($e^+e^- \to 渭^+ 渭^- (n纬)$) events. The total integrated luminosity obtained with Bhabha, diga… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00965v2-abstract-full').style.display = 'inline'; document.getElementById('2407.00965v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.00965v2-abstract-full" style="display: none;"> A series of data samples was collected with the Belle~II detector at the SuperKEKB collider from March 2019 to June 2022. We determine the integrated luminosities of these data samples using three distinct methodologies involving Bhabha ($e^+e^- \to e^+e^-(n纬)$), digamma ($e^+e^- \to 纬纬(n纬)$), and dimuon ($e^+e^- \to 渭^+ 渭^- (n纬)$) events. The total integrated luminosity obtained with Bhabha, digamma, and dimuon events is ({426.88} $\pm$ 0.03 $\pm$ {2.61})~fb$^{-1}$, ({429.28} $\pm$ 0.03 $\pm$ {2.62})~fb$^{-1}$, and ({423.99} $\pm$ 0.04 $\pm$ {3.83})~fb$^{-1}$, where the first uncertainties are statistical and the second are systematic. The resulting total integrated luminosity obtained from the combination of the three methods is ({427.87 $\pm$ 2.01})~fb$^{-1}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00965v2-abstract-full').style.display = 'none'; document.getElementById('2407.00965v2-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">12 pages, 3 figures; accepted for publication in Chinese Physics C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-019; KEK Preprint 2024-16 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.00879">arXiv:2407.00879</a> <span> [<a href="https://arxiv.org/pdf/2407.00879">pdf</a>, <a href="https://arxiv.org/ps/2407.00879">ps</a>, <a href="https://arxiv.org/format/2407.00879">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> </div> </div> <p class="title is-5 mathjax"> Study of $蠂_{bJ}(2P)\to蠅违(1S)$ at Belle </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Stottler%2C+Z+S">Z. S. Stottler</a>, <a href="/search/hep-ex?searchtype=author&query=Pedlar%2C+T+K">T. K. Pedlar</a>, <a href="/search/hep-ex?searchtype=author&query=Fulsom%2C+B+G">B. G. Fulsom</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bernlochner%2C+F">F. Bernlochner</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+G">G. Bonvicini</a> , et al. (157 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="2407.00879v3-abstract-short" style="display: inline;"> We report a study of the hadronic transitions $蠂_{bJ}(2P)\to蠅违(1S)$, with $蠅\to蟺^{+}蟺^{-}蟺^{0}$, using $28.2\times10^6~违(3S)$ mesons recorded by the Belle detector. We present the first evidence for the near--threshold transition $蠂_{b0}(2P)\to蠅违(1S)$, the analog of the charm sector decay $蠂_{c1}(3872)\to蠅J/蠄$, with a branching fraction of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00879v3-abstract-full').style.display = 'inline'; document.getElementById('2407.00879v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.00879v3-abstract-full" style="display: none;"> We report a study of the hadronic transitions $蠂_{bJ}(2P)\to蠅违(1S)$, with $蠅\to蟺^{+}蟺^{-}蟺^{0}$, using $28.2\times10^6~违(3S)$ mesons recorded by the Belle detector. We present the first evidence for the near--threshold transition $蠂_{b0}(2P)\to蠅违(1S)$, the analog of the charm sector decay $蠂_{c1}(3872)\to蠅J/蠄$, with a branching fraction of $B\big(蠂_{b0}(2P)\to蠅违(1S)\big) = \big(0.55\pm0.19\pm0.07\big)\%$. We also obtain branching fractions of $B\big(蠂_{b1}(2P)\to蠅违(1S)\big) = \big(2.39{}^{+0.20}_{-0.19}\pm0.24\big)\%$ and $B\big(蠂_{b2}(2P)\to蠅违(1S)\big) = \big(0.47{}^{+0.13}_{-0.12}\pm0.06\big)\%$, confirming the measurement of the $蠅$ transitions of the $J=1,2~P$--wave states. The ratio for the $J=2$ to $J=1$ transitions is also measured and found to differ by 3.3 standard deviations from the expected value in the QCD multipole expansion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00879v3-abstract-full').style.display = 'none'; document.getElementById('2407.00879v3-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">6 pages, 2 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint: 2024-05; KEK Preprint: 2024-10 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.06277">arXiv:2406.06277</a> <span> [<a href="https://arxiv.org/pdf/2406.06277">pdf</a>, <a href="https://arxiv.org/format/2406.06277">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> </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/JHEP08(2024)206">10.1007/JHEP08(2024)206 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the branching fractions of $\bar{B}\to D^{(*)} K^- K^{(*)0}_{(S)}$ and $\bar{B}\to D^{(*)}D_s^{-}$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (382 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="2406.06277v4-abstract-short" style="display: inline;"> We present measurements of the branching fractions of eight $\overline B{}^0\to D^{(*)+} K^- K^{(*)0}_{(S)}$, $B^{-}\to D^{(*)0} K^- K^{(*)0}_{(S)}$ decay channels. The results are based on data from SuperKEKB electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector, corresponding to an integrated luminosity of $362~\text{fb}^{-1}$. The event yields are extracted… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.06277v4-abstract-full').style.display = 'inline'; document.getElementById('2406.06277v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.06277v4-abstract-full" style="display: none;"> We present measurements of the branching fractions of eight $\overline B{}^0\to D^{(*)+} K^- K^{(*)0}_{(S)}$, $B^{-}\to D^{(*)0} K^- K^{(*)0}_{(S)}$ decay channels. The results are based on data from SuperKEKB electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector, corresponding to an integrated luminosity of $362~\text{fb}^{-1}$. The event yields are extracted from fits to the distributions of the difference between expected and observed $B$ meson energy, and are efficiency-corrected as a function of $m(K^-K^{(*)0}_{(S)})$ and $m(D^{(*)}K^{(*)0}_{(S)})$ in order to avoid dependence on the decay model. These results include the first observation of $\overline B{}^0\to D^+K^-K_S^0$, $B^-\to D^{*0}K^-K_S^0$, and $\overline B{}^0\to D^{*+}K^-K_S^0$ decays and a significant improvement in the precision of the other channels compared to previous measurements. The helicity-angle distributions and the invariant mass distributions of the $K^- K^{(*)0}_{(S)}$ systems are compatible with quasi-two-body decays via a resonant transition with spin-parity $J^P=1^-$ for the $K^-K_S^0$ systems and $J^P= 1^+$ for the $K^-K^{*0}$ systems. We also present measurements of the branching fractions of four $\overline B{}^0\to D^{(*)+} D_s^-$, $B^{-}\to D^{(*)0} D_s^- $ decay channels with a precision compatible to the current world averages. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.06277v4-abstract-full').style.display = 'none'; document.getElementById('2406.06277v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 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">34 pages, 14 figures. arXiv admin note: text overlap with arXiv:2305.01321</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint: 2024-014, KEK Preprint: 2024-8 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. High Energ. Phys. 08 (2024) 206 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.04642">arXiv:2406.04642</a> <span> [<a href="https://arxiv.org/pdf/2406.04642">pdf</a>, <a href="https://arxiv.org/ps/2406.04642">ps</a>, <a href="https://arxiv.org/format/2406.04642">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> </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/JHEP10(2024)045">10.1007/JHEP10(2024)045 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of the branching fractions of $螢_{c}^{0}\to螢^{0}蟺^{0}$, $螢_{c}^{0}\to螢^{0}畏$, and $螢_{c}^{0}\to螢^{0}畏^{\prime}$ and asymmetry parameter of $螢_{c}^{0}\to螢^{0}蟺^{0}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (360 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="2406.04642v2-abstract-short" style="display: inline;"> We present a study of $螢_{c}^{0}\to螢^{0}蟺^{0}$, $螢_{c}^{0}\to螢^{0}畏$, and $螢_{c}^{0}\to螢^{0}畏^{\prime}$ decays using the Belle and Belle~II data samples, which have integrated luminosities of 980~$\mathrm{fb}^{-1}$ and 426~$\mathrm{fb}^{-1}$, respectively. We measure the following relative branching fractions… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.04642v2-abstract-full').style.display = 'inline'; document.getElementById('2406.04642v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.04642v2-abstract-full" style="display: none;"> We present a study of $螢_{c}^{0}\to螢^{0}蟺^{0}$, $螢_{c}^{0}\to螢^{0}畏$, and $螢_{c}^{0}\to螢^{0}畏^{\prime}$ decays using the Belle and Belle~II data samples, which have integrated luminosities of 980~$\mathrm{fb}^{-1}$ and 426~$\mathrm{fb}^{-1}$, respectively. We measure the following relative branching fractions $${\cal B}(螢_{c}^{0}\to螢^{0}蟺^{0})/{\cal B}(螢_{c}^{0}\to螢^{-}蟺^{+}) = 0.48 \pm 0.02 ({\rm stat}) \pm 0.03 ({\rm syst}) ,$$ $${\cal B}(螢_{c}^{0}\to螢^{0}畏)/{\cal B}(螢_{c}^{0}\to螢^{-}蟺^{+}) = 0.11 \pm 0.01 ({\rm stat}) \pm 0.01 ({\rm syst}) ,$$ $${\cal B}(螢_{c}^{0}\to螢^{0}畏^{\prime})/{\cal B}(螢_{c}^{0}\to螢^{-}蟺^{+}) = 0.08 \pm 0.02 ({\rm stat}) \pm 0.01 ({\rm syst}) $$ for the first time, where the uncertainties are statistical ($\rm stat$) and systematic ($\rm syst$). By multiplying by the branching fraction of the normalization mode, ${\mathcal B}(螢_{c}^{0}\to螢^{-}蟺^{+})$, we obtain the following absolute branching fraction results $(6.9 \pm 0.3 ({\rm stat}) \pm 0.5 ({\rm syst}) \pm 1.3 ({\rm norm})) \times 10^{-3}$, $(1.6 \pm 0.2 ({\rm stat}) \pm 0.2 ({\rm syst}) \pm 0.3 ({\rm norm})) \times 10^{-3}$, and $(1.2 \pm 0.3 ({\rm stat}) \pm 0.1 ({\rm syst}) \pm 0.2 ({\rm norm})) \times 10^{-3}$, for $螢_{c}^{0}$ decays to $螢^{0}蟺^{0}$, $螢^{0}畏$, and $螢^{0}畏^{\prime}$ final states, respectively. The third errors are from the uncertainty on ${\mathcal B}(螢_{c}^{0}\to螢^{-}蟺^{+})$. The asymmetry parameter for $螢_{c}^{0}\to螢^{0}蟺^{0}$ is measured to be $伪(螢_{c}^{0}\to螢^{0}蟺^{0}) = -0.90\pm0.15({\rm stat})\pm0.23({\rm syst})$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.04642v2-abstract-full').style.display = 'none'; document.getElementById('2406.04642v2-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> 5 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 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">23 pages, 5 figures, accepted for publication by JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-015; KEK Preprint 2024-9 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP10(2024)045 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.19734">arXiv:2405.19734</a> <span> [<a href="https://arxiv.org/pdf/2405.19734">pdf</a>, <a href="https://arxiv.org/format/2405.19734">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> </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.110.L031106">10.1103/PhysRevD.110.L031106 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for the decay $B^{0}\to纬纬$ using Belle and Belle II data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a> , et al. (385 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="2405.19734v2-abstract-short" style="display: inline;"> We report the result of a search for the rare decay $B^{0} \to 纬纬$ using a combined dataset of $753\times10^{6}$ $B\bar{B}$ pairs collected by the Belle experiment and $387\times10^{6}$ $B\bar{B}$ pairs collected by the Belle II experiment from decays of the $\rm 违(4S)$ resonance produced in $e^{+}e^{-}$ collisions. A simultaneous fit to the Belle and Belle II data sets yields… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.19734v2-abstract-full').style.display = 'inline'; document.getElementById('2405.19734v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.19734v2-abstract-full" style="display: none;"> We report the result of a search for the rare decay $B^{0} \to 纬纬$ using a combined dataset of $753\times10^{6}$ $B\bar{B}$ pairs collected by the Belle experiment and $387\times10^{6}$ $B\bar{B}$ pairs collected by the Belle II experiment from decays of the $\rm 违(4S)$ resonance produced in $e^{+}e^{-}$ collisions. A simultaneous fit to the Belle and Belle II data sets yields $11.0^{+6.5}_{-5.5}$ signal events, corresponding to a 2.5$蟽$ significance. We determine the branching fraction $\mathcal{B}(B^{0} \to 纬纬) = (3.7^{+2.2}_{-1.8}(\rm stat)\pm0.5(\rm syst))\times10^{-8}$ and set a 90% credibility level upper limit of $\mathcal{B}(B^{0} \to 纬纬) < 6.4\times10^{-8}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.19734v2-abstract-full').style.display = 'none'; document.getElementById('2405.19734v2-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> 27 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">Published in PRD(L)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint: 2024-017, KEK Preprint: 2024-13 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 110, L031106 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.18928">arXiv:2405.18928</a> <span> [<a href="https://arxiv.org/pdf/2405.18928">pdf</a>, <a href="https://arxiv.org/format/2405.18928">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> </div> </div> <p class="title is-5 mathjax"> Measurement of the energy dependence of the $e^+e^- \to B\bar{B}$, $B\bar{B}{}^*$, and $B^*\bar{B}{}^*$ cross sections at Belle~II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a> , et al. (444 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="2405.18928v2-abstract-short" style="display: inline;"> We report measurements of the $e^+e^- \to B\bar{B}$, $B\bar{B}{}^*$, and $B^*\bar{B}{}^*$ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle~II experiment. We reconstruct one $B$ meson in a large number of hadronic final states and use its momentum to identify the production process. In the first $2-5$ MeV above $B^*\bar{B}{}^*$ threshold, the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.18928v2-abstract-full').style.display = 'inline'; document.getElementById('2405.18928v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.18928v2-abstract-full" style="display: none;"> We report measurements of the $e^+e^- \to B\bar{B}$, $B\bar{B}{}^*$, and $B^*\bar{B}{}^*$ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle~II experiment. We reconstruct one $B$ meson in a large number of hadronic final states and use its momentum to identify the production process. In the first $2-5$ MeV above $B^*\bar{B}{}^*$ threshold, the $e^+e^- \to B^*\bar{B}{}^*$ cross section increases rapidly. This may indicate the presence of a pole close to the threshold. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.18928v2-abstract-full').style.display = 'none'; document.getElementById('2405.18928v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">30 pages, 15 figures, version accepted by JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-016, KEK Preprint 2024-12 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.14625">arXiv:2405.14625</a> <span> [<a href="https://arxiv.org/pdf/2405.14625">pdf</a>, <a href="https://arxiv.org/format/2405.14625">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> </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/JHEP08(2024)205">10.1007/JHEP08(2024)205 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Test of light-lepton universality in $蟿$ decays with the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (406 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="2405.14625v2-abstract-short" style="display: inline;"> We present a measurement of the ratio $R_渭= \mathcal{B}(蟿^-\to 渭^-\bar谓_渭谓_蟿) / \mathcal{B}(蟿^-\to e^-\bar谓_e谓_蟿)$ of branching fractions $\mathcal{B}$ of the $蟿$ lepton decaying to muons or electrons using data collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider. The sample has an integrated luminosity of $362\!\pm\!2\,\text{fb}^{-1}$ at a centre-of-mass energy of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.14625v2-abstract-full').style.display = 'inline'; document.getElementById('2405.14625v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.14625v2-abstract-full" style="display: none;"> We present a measurement of the ratio $R_渭= \mathcal{B}(蟿^-\to 渭^-\bar谓_渭谓_蟿) / \mathcal{B}(蟿^-\to e^-\bar谓_e谓_蟿)$ of branching fractions $\mathcal{B}$ of the $蟿$ lepton decaying to muons or electrons using data collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider. The sample has an integrated luminosity of $362\!\pm\!2\,\text{fb}^{-1}$ at a centre-of-mass energy of $10.58\,\text{GeV}$. Using an optimised event selection, a binned maximum likelihood fit is performed using the momentum spectra of the electron and muon candidates. The result, $R_渭= 0.9675 \pm 0.0007 \pm 0.0036$, where the first uncertainty is statistical and the second is systematic, is the most precise to date. It provides a stringent test of the light-lepton universality, translating to a ratio of the couplings of the muon and electron to the $W$ boson in $蟿$ decays of $0.9974 \pm 0.0019$, in agreement with the standard model expectation of unity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.14625v2-abstract-full').style.display = 'none'; document.getElementById('2405.14625v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">22 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-002, KEK Preprint 2023-49 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of High Energy Physics 08 (2024) 205 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.07386">arXiv:2405.07386</a> <span> [<a href="https://arxiv.org/pdf/2405.07386">pdf</a>, <a href="https://arxiv.org/format/2405.07386">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> </div> </div> <p class="title is-5 mathjax"> Search for lepton-flavor-violating $蟿^- \to 渭^-渭^+渭^-$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (407 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="2405.07386v1-abstract-short" style="display: inline;"> We present the result of a search for the charged-lepton-flavor violating decay $蟿^- \to 渭^-渭^+渭^-$ using a $424fb^{-1}$ sample of data recorded by the Belle II experiment at the SuperKEKB $e^{-}e^{+}$ collider. The selection of $e^{-}e^{+}\to蟿^+蟿^-$ events is based on an inclusive reconstruction of the non-signal tau decay, and on a boosted decision tree to suppress background. We observe one sig… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.07386v1-abstract-full').style.display = 'inline'; document.getElementById('2405.07386v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.07386v1-abstract-full" style="display: none;"> We present the result of a search for the charged-lepton-flavor violating decay $蟿^- \to 渭^-渭^+渭^-$ using a $424fb^{-1}$ sample of data recorded by the Belle II experiment at the SuperKEKB $e^{-}e^{+}$ collider. The selection of $e^{-}e^{+}\to蟿^+蟿^-$ events is based on an inclusive reconstruction of the non-signal tau decay, and on a boosted decision tree to suppress background. We observe one signal candidate, which is compatible with the expectation from background processes. We set a $90\%$ confidence level upper limit of $1.9 \times 10^{-8}$ on the branching fraction of the \taumu decay, which is the most stringent bound to date. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.07386v1-abstract-full').style.display = 'none'; document.getElementById('2405.07386v1-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 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-012 KEK Preprint 2024-6 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.12817">arXiv:2404.12817</a> <span> [<a href="https://arxiv.org/pdf/2404.12817">pdf</a>, <a href="https://arxiv.org/format/2404.12817">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> </div> </div> <p class="title is-5 mathjax"> Determination of the CKM angle $蠁_{3}$ from a combination of Belle and Belle II results </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (377 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="2404.12817v2-abstract-short" style="display: inline;"> We report a determination of the CKM angle $蠁_{3}$, also known as $纬$, from a combination of measurements using samples of up to 711~fb$^{-1}$ from the Belle experiment and up to 362~fb$^{-1}$ from the Belle II experiment. We combine results from analyses of $B^+\to DK^+, B^+\to D蟺^+$, and $B^+ \to D^{*}K^+$ decays, where $D$ is an admixture of $D^0$ and $\overline{D}{}^{0}$ mesons, in a likelihoo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.12817v2-abstract-full').style.display = 'inline'; document.getElementById('2404.12817v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.12817v2-abstract-full" style="display: none;"> We report a determination of the CKM angle $蠁_{3}$, also known as $纬$, from a combination of measurements using samples of up to 711~fb$^{-1}$ from the Belle experiment and up to 362~fb$^{-1}$ from the Belle II experiment. We combine results from analyses of $B^+\to DK^+, B^+\to D蟺^+$, and $B^+ \to D^{*}K^+$ decays, where $D$ is an admixture of $D^0$ and $\overline{D}{}^{0}$ mesons, in a likelihood fit to obtain $蠁_{3} = (78.6^{+7.2}_{-7.3})^{\circ}$. We also briefly discuss the interpretation of this result. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.12817v2-abstract-full').style.display = 'none'; document.getElementById('2404.12817v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">31 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-015, KEK Preprint 2023-31 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.10874">arXiv:2404.10874</a> <span> [<a href="https://arxiv.org/pdf/2404.10874">pdf</a>, <a href="https://arxiv.org/format/2404.10874">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> </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.109.L111103">10.1103/PhysRevD.109.L111103 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the branching fraction of the decay $B^- \to D^0 蟻(770)^-$ at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a> , et al. (367 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.10874v2-abstract-short" style="display: inline;"> We measure the branching fraction of the decay $B^- \to D^0 蟻(770)^-$ using data collected with the Belle II detector. The data contain 387 million $B\overline{B}$ pairs produced in $e^+e^-$ collisions at the $违(4S)$ resonance. We reconstruct $8360\pm 180$ decays from an analysis of the distributions of the $B^-$ energy and the $蟻(770)^-$ helicity angle. We determine the branching fraction to be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.10874v2-abstract-full').style.display = 'inline'; document.getElementById('2404.10874v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.10874v2-abstract-full" style="display: none;"> We measure the branching fraction of the decay $B^- \to D^0 蟻(770)^-$ using data collected with the Belle II detector. The data contain 387 million $B\overline{B}$ pairs produced in $e^+e^-$ collisions at the $违(4S)$ resonance. We reconstruct $8360\pm 180$ decays from an analysis of the distributions of the $B^-$ energy and the $蟻(770)^-$ helicity angle. We determine the branching fraction to be $(0.939 \pm 0.021\mathrm{(stat)} \pm 0.050\mathrm{(syst)})\%$, in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.10874v2-abstract-full').style.display = 'none'; document.getElementById('2404.10874v2-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> 27 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-011, KEK Preprint 2024-4 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PRD 109, 111103 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.08133">arXiv:2404.08133</a> <span> [<a href="https://arxiv.org/pdf/2404.08133">pdf</a>, <a href="https://arxiv.org/format/2404.08133">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> </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.133.101804">10.1103/PhysRevLett.133.101804 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for Rare $b \to d\ell^+\ell^-$ Transitions at Belle </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (371 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="2404.08133v2-abstract-short" style="display: inline;"> We present the results of a search for the $b \to d\ell^+\ell^-$ flavor-changing neutral-current rare decays $B^{+, 0} \to (畏, 蠅, 蟺^{+,0}, 蟻^{+, 0}) e^+e^-$ and $B^{+, 0} \to (畏, 蠅, 蟺^{0}, 蟻^{+}) 渭^+渭^-$ using a $711$ fb$^{-1}$ data sample that contains $772 \times 10^{6}$ $B\overline{B}$ events. The data were collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08133v2-abstract-full').style.display = 'inline'; document.getElementById('2404.08133v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.08133v2-abstract-full" style="display: none;"> We present the results of a search for the $b \to d\ell^+\ell^-$ flavor-changing neutral-current rare decays $B^{+, 0} \to (畏, 蠅, 蟺^{+,0}, 蟻^{+, 0}) e^+e^-$ and $B^{+, 0} \to (畏, 蠅, 蟺^{0}, 蟻^{+}) 渭^+渭^-$ using a $711$ fb$^{-1}$ data sample that contains $772 \times 10^{6}$ $B\overline{B}$ events. The data were collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We find no evidence for signal and set upper limits on branching fractions at the $90\%$ confidence level in the range $(3.8 - 47) \times 10^{-8}$ depending on the decay channel. The obtained limits are the world's best results. This is the first search for the channels $B^{+, 0} \to (蠅, 蟻^{+,0}) e^+e^-$ and $B^{+, 0} \to (蠅, 蟻^{+})渭^+渭^-$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08133v2-abstract-full').style.display = 'none'; document.getElementById('2404.08133v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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, 12 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-005, KEK Preprint 2023-52 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 133, 101804 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.04915">arXiv:2404.04915</a> <span> [<a href="https://arxiv.org/pdf/2404.04915">pdf</a>, <a href="https://arxiv.org/format/2404.04915">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> </div> </div> <p class="title is-5 mathjax"> Measurement of the $e^+e^- \to 蟺^+蟺^-蟺^0$ cross section in the energy range 0.62-3.50 GeV at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a> , et al. (338 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="2404.04915v1-abstract-short" style="display: inline;"> We report a measurement of the $e^+e^- \to 蟺^+蟺^-蟺^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. We use an $e^+e^-$ data sample corresponding to 191 $\text{fb}^{-1}$ of integrated luminosity, collected at a center-of-mass energy at or near the $违{(4S)}$ resonance with the Belle II detector at the SuperKEKB collider. Signal yields are extract… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04915v1-abstract-full').style.display = 'inline'; document.getElementById('2404.04915v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.04915v1-abstract-full" style="display: none;"> We report a measurement of the $e^+e^- \to 蟺^+蟺^-蟺^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. We use an $e^+e^-$ data sample corresponding to 191 $\text{fb}^{-1}$ of integrated luminosity, collected at a center-of-mass energy at or near the $违{(4S)}$ resonance with the Belle II detector at the SuperKEKB collider. Signal yields are extracted by fitting the two-photon mass distribution in $e^+e^- \to 蟺^+蟺^-蟺^0纬$ events, which involve a $蟺^0 \to 纬纬$ decay and an energetic photon radiated from the initial state. Signal efficiency corrections with an accuracy of 1.6% are obtained from several control data samples. The uncertainty on the cross section at the $蠅$ and $蠁$ resonances is dominated by the systematic uncertainty of 2.2%. The resulting cross sections in the 0.62-1.80 GeV energy range yield $ a_渭^{3蟺} = [48.91 \pm 0.23~(\mathrm{stat}) \pm 1.07~(\mathrm{syst})] \times 10^{-10} $ for the leading-order hadronic vacuum polarization contribution to the muon anomalous magnetic moment. This result differs by $2.5$ standard deviations from the most precise current determination. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04915v1-abstract-full').style.display = 'none'; document.getElementById('2404.04915v1-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 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">23 pages, 24 figures, submitted to PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KEK Preprint 2023-51, Belle II Preprint 2024-004 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.00201">arXiv:2404.00201</a> <span> [<a href="https://arxiv.org/pdf/2404.00201">pdf</a>, <a href="https://arxiv.org/format/2404.00201">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> </div> </div> <p class="title is-5 mathjax"> Angular analysis of $B \to K^* e^+ e^-$ in the low-$q^2$ region with new electron identification at Belle </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Ferlewicz%2C+D">D. Ferlewicz</a>, <a href="/search/hep-ex?searchtype=author&query=Urquijo%2C+P">P. Urquijo</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bhardwaj%2C+V">V. Bhardwaj</a>, <a href="/search/hep-ex?searchtype=author&query=Bhuyan%2C+B">B. Bhuyan</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Browder%2C+T+E">T. E. Browder</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Campajola%2C+M">M. Campajola</a> , et al. (145 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="2404.00201v3-abstract-short" style="display: inline;"> We perform an angular analysis of the $B\to K^* e^+ e^-$ decay for the dielectron mass squared, $q^2$, range of $0.0008$ to $1.1200 ~\text{GeV}^2 /c^4$ using the full Belle data set in the $K^{*0} \to K^+ 蟺^-$ and $K^{*+} \to K_S^0 蟺^+$ channels, incorporating new methods of electron identification to improve the statistical power of the data set. This analysis is sensitive to contributions from r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.00201v3-abstract-full').style.display = 'inline'; document.getElementById('2404.00201v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.00201v3-abstract-full" style="display: none;"> We perform an angular analysis of the $B\to K^* e^+ e^-$ decay for the dielectron mass squared, $q^2$, range of $0.0008$ to $1.1200 ~\text{GeV}^2 /c^4$ using the full Belle data set in the $K^{*0} \to K^+ 蟺^-$ and $K^{*+} \to K_S^0 蟺^+$ channels, incorporating new methods of electron identification to improve the statistical power of the data set. This analysis is sensitive to contributions from right-handed currents from physics beyond the Standard Model by constraining the Wilson coefficients $\mathcal{C}_7^{(\prime)}$. We perform a fit to the $B\to K^* e^+ e^-$ differential decay rate and measure the imaginary component of the transversality amplitude to be $A_T^{\rm Im} = -1.27 \pm 0.52 \pm 0.12$, and the $K^*$ transverse asymmetry to be $A_T^{(2)} = 0.52 \pm 0.53 \pm 0.11$, with $F_L$ and $A_T^{\rm Re}$ fixed to the Standard Model values. The resulting constraints on the value of $\mathcal{C}_7^{\prime}$ are consistent with the Standard Model within a $2蟽$ confidence interval. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.00201v3-abstract-full').style.display = 'none'; document.getElementById('2404.00201v3-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">Accepted by PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle preprint 2023-20, KEK preprint 2023-38 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.02841">arXiv:2403.02841</a> <span> [<a href="https://arxiv.org/pdf/2403.02841">pdf</a>, <a href="https://arxiv.org/format/2403.02841">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> </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.109.112015">10.1103/PhysRevD.109.112015 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for a $渭^+渭^-$ resonance in four-muon final states at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (379 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="2403.02841v2-abstract-short" style="display: inline;"> We report on a search for a resonance $X$ decaying to a pair of muons in $e^{+}e^{-}\rightarrow 渭^+ 渭^- X$ events in the 0.212-9.000 GeV/$c^{2}$ mass range, using 178 fb$^{-1}$ of data collected by the BelleII experiment at the SuperKEKB collider at a center of mass energy of 10.58 GeV. The analysis probes two different models of $X$ beyond the standard model: a $Z^{\prime}$ vector boson in the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02841v2-abstract-full').style.display = 'inline'; document.getElementById('2403.02841v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.02841v2-abstract-full" style="display: none;"> We report on a search for a resonance $X$ decaying to a pair of muons in $e^{+}e^{-}\rightarrow 渭^+ 渭^- X$ events in the 0.212-9.000 GeV/$c^{2}$ mass range, using 178 fb$^{-1}$ of data collected by the BelleII experiment at the SuperKEKB collider at a center of mass energy of 10.58 GeV. The analysis probes two different models of $X$ beyond the standard model: a $Z^{\prime}$ vector boson in the $L_渭-L_蟿$ model and a muonphilic scalar. We observe no evidence for a signal and set exclusion limits at the 90$\%$ confidence level on the products of cross section and branching fraction for these processes, ranging from 0.046 fb to 0.97 fb for the $L_渭-L_蟿$ model and from 0.055 fb to 1.3 fb for the muonphilic scalar model. For masses below 6 GeV/$c^{2}$, the corresponding constraints on the couplings of these processes to the standard model range from 0.0008 to 0.039 for the $L_渭-L_蟿$ model and from 0.0018 to 0.040 for the muonphilic scalar model. These are the first constraints on the muonphilic scalar from a dedicated search. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02841v2-abstract-full').style.display = 'none'; document.getElementById('2403.02841v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> 2024-007, 2023-55 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 109, 112015 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.02590">arXiv:2403.02590</a> <span> [<a href="https://arxiv.org/pdf/2403.02590">pdf</a>, <a href="https://arxiv.org/format/2403.02590">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> </div> </div> <p class="title is-5 mathjax"> Measurement of $CP$ asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (428 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="2403.02590v1-abstract-short" style="display: inline;"> We report a measurement of decay-time dependent charge-parity ($CP$) asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $387 \times 10^6 B\bar{B}$ pairs collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the $CP$-violating parameters $S$ and $C$ from a fit to the di… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02590v1-abstract-full').style.display = 'inline'; document.getElementById('2403.02590v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.02590v1-abstract-full" style="display: none;"> We report a measurement of decay-time dependent charge-parity ($CP$) asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $387 \times 10^6 B\bar{B}$ pairs collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the $CP$-violating parameters $S$ and $C$ from a fit to the distribution of the decay-time difference between the two $B$ mesons. The resulting confidence region is consistent with previous measurements in $B^0 \rightarrow K^0_S K^0_S K^0_S$ and $B^0 \rightarrow (c\bar{c})K^0$ decays, and with predictions based on the standard model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02590v1-abstract-full').style.display = 'none'; document.getElementById('2403.02590v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">10 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-008, KEK Preprint 2023-56 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.17260">arXiv:2402.17260</a> <span> [<a href="https://arxiv.org/pdf/2402.17260">pdf</a>, <a href="https://arxiv.org/format/2402.17260">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> </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.110.012001">10.1103/PhysRevD.110.012001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New graph-neural-network flavor tagger for Belle II and measurement of $\sin2蠁_1$ in $B^0 \to J/蠄K^0_\text{S}$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (391 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="2402.17260v2-abstract-short" style="display: inline;"> We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral $B$ mesons produced in $违(4S)$ decays. It improves previous algorithms by using the information from all charged final-state particles and the relations between them. We evaluate its performance using $B$ decays to flavor-specific hadronic final states reconstructed in a 362 $\text{fb}^{-1}$ sampl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.17260v2-abstract-full').style.display = 'inline'; document.getElementById('2402.17260v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.17260v2-abstract-full" style="display: none;"> We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral $B$ mesons produced in $违(4S)$ decays. It improves previous algorithms by using the information from all charged final-state particles and the relations between them. We evaluate its performance using $B$ decays to flavor-specific hadronic final states reconstructed in a 362 $\text{fb}^{-1}$ sample of electron-positron collisions collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB collider. We achieve an effective tagging efficiency of $(37.40 \pm 0.43 \pm 0.36) \%$, where the first uncertainty is statistical and the second systematic, which is $18\%$ better than the previous Belle II algorithm. Demonstrating the algorithm, we use $B^{0}\to J/蠄K^0_\text{S}$ decays to measure the mixing-induced and direct $CP$ violation parameters, $S = (0.724 \pm 0.035 \pm 0.009)$ and $C = (-0.035 \pm 0.026 \pm 0.029)$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.17260v2-abstract-full').style.display = 'none'; document.getElementById('2402.17260v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 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">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-006, KEK Preprint 2023-53 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 110, 012001, 2024 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.03713">arXiv:2402.03713</a> <span> [<a href="https://arxiv.org/pdf/2402.03713">pdf</a>, <a href="https://arxiv.org/format/2402.03713">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> </div> </div> <p class="title is-5 mathjax"> Measurement of $CP$ asymmetries in $B^0\to畏'K^0_s$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a> , et al. (377 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="2402.03713v1-abstract-short" style="display: inline;"> We describe a measurement of charge-parity ($CP$) violation asymmetries in $B^0\to畏'K^0_S$ decays using Belle II data. We consider $畏'\to畏(\to纬纬)蟺^+蟺^-$ and $畏'\to蟻(\to蟺^+蟺^-)纬$ decays. The data were collected at the SuperKEKB asymmetric-energy $e^+e^-$ collider between the years 2019 and 2022, and contain $(387\pm 6) \times 10^6$ bottom-antibottom meson pairs. We reconstruct $829\pm35$ signal dec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.03713v1-abstract-full').style.display = 'inline'; document.getElementById('2402.03713v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.03713v1-abstract-full" style="display: none;"> We describe a measurement of charge-parity ($CP$) violation asymmetries in $B^0\to畏'K^0_S$ decays using Belle II data. We consider $畏'\to畏(\to纬纬)蟺^+蟺^-$ and $畏'\to蟻(\to蟺^+蟺^-)纬$ decays. The data were collected at the SuperKEKB asymmetric-energy $e^+e^-$ collider between the years 2019 and 2022, and contain $(387\pm 6) \times 10^6$ bottom-antibottom meson pairs. We reconstruct $829\pm35$ signal decays and extract the $CP$ violating parameters from a fit to the distribution of the proper-decay-time difference between the two $B$ mesons. The measured direct and mixing-induced $CP$ asymmetries are $\text{C}_{畏'K^0_S} = -0.19 \pm 0.08 \pm 0.03 $ and $\text{S}_{畏'K^0_S} = +0.67 \pm 0.10 \pm 0.04 $, respectively, where the first uncertainties are statistical and the second are systematic. These results are in agreement with current world averages and standard model predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.03713v1-abstract-full').style.display = 'none'; document.getElementById('2402.03713v1-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 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> Belle II Preprint 2024-003, KEK Preprint 2023-50 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.02580">arXiv:2402.02580</a> <span> [<a href="https://arxiv.org/pdf/2402.02580">pdf</a>, <a href="https://arxiv.org/format/2402.02580">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> </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.109.L111102">10.1103/PhysRevD.109.L111102 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for a heavy neutral lepton that mixes predominantly with the tau neutrino </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Nayak%2C+M">M. Nayak</a>, <a href="/search/hep-ex?searchtype=author&query=Dey%2C+S">S. Dey</a>, <a href="/search/hep-ex?searchtype=author&query=Soffer%2C+A">A. Soffer</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bhardwaj%2C+V">V. Bhardwaj</a>, <a href="/search/hep-ex?searchtype=author&query=Bhuyan%2C+B">B. Bhuyan</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Browder%2C+T+E">T. E. Browder</a> , et al. (143 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="2402.02580v3-abstract-short" style="display: inline;"> We report a search for a heavy neutral lepton (HNL) that mixes predominantly with $谓_蟿$. The search utilizes data collected with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. The data sample was collected at and just below the center-of-mass energies of the $违(4S)$ and $违(5S)$ resonances and has an integrated luminosity of $915~\textrm{fb}^{-1}$, corresponding to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.02580v3-abstract-full').style.display = 'inline'; document.getElementById('2402.02580v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.02580v3-abstract-full" style="display: none;"> We report a search for a heavy neutral lepton (HNL) that mixes predominantly with $谓_蟿$. The search utilizes data collected with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. The data sample was collected at and just below the center-of-mass energies of the $违(4S)$ and $违(5S)$ resonances and has an integrated luminosity of $915~\textrm{fb}^{-1}$, corresponding to $(836\pm 12)\times 10^6$ $e^+e^\to蟿^+蟿^-$ events. We search for production of the HNL (denoted $N$) in the decay $蟿^-\to 蟺^- N$ followed by its decay via $N \to 渭^+渭^- 谓_蟿$. The search focuses on the parameter-space region in which the HNL is long lived, so that the $渭^+渭^-$ originate from a common vertex that is significantly displaced from the collision point of the KEKB beams. Consistent with the expected background yield, one event is observed in the data sample after application of all the event-selection criteria. We report limits on the mixing parameter of the HNL with the $蟿$ neutrino as a function of the HNL mass. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.02580v3-abstract-full').style.display = 'none'; document.getElementById('2402.02580v3-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 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 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">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-22, KEK Preprint 2023-44 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D 109 (2024) 11, L111102 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.12021">arXiv:2401.12021</a> <span> [<a href="https://arxiv.org/pdf/2401.12021">pdf</a>, <a href="https://arxiv.org/format/2401.12021">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> </div> </div> <p class="title is-5 mathjax"> Study of $违(10753)$ decays to $蟺^{+}蟺^{-}违(nS)$ final states at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (371 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="2401.12021v3-abstract-short" style="display: inline;"> We present an analysis of the process $e^{+}e^{-}\to蟺^{+}蟺^{-}违(nS)$ (where $n$ = 1, 2, or 3) reconstructed in $19.6\rm$ $\rm fb^{-1}$ of Belle II data during a special run of the SuperKEKB collider at four energy points near the peak of the $违(10753)$ resonance. By analyzing the mass distribution of the $蟺^+蟺^-违(nS)$ system and the Born cross sections of the $e^{+}e^{-}\to蟺^{+}蟺^{-}违(nS)$ process… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12021v3-abstract-full').style.display = 'inline'; document.getElementById('2401.12021v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.12021v3-abstract-full" style="display: none;"> We present an analysis of the process $e^{+}e^{-}\to蟺^{+}蟺^{-}违(nS)$ (where $n$ = 1, 2, or 3) reconstructed in $19.6\rm$ $\rm fb^{-1}$ of Belle II data during a special run of the SuperKEKB collider at four energy points near the peak of the $违(10753)$ resonance. By analyzing the mass distribution of the $蟺^+蟺^-违(nS)$ system and the Born cross sections of the $e^{+}e^{-}\to蟺^{+}蟺^{-}违(nS)$ process, we report the first observation of $违(10753)$ decays to the $蟺^{+}蟺^{-}违(1S)$ and $蟺^{+}蟺^{-}违(2S)$ final states, and find no evidence for decays to $蟺^{+}蟺^{-}违(3S)$. Possible intermediate states in the $蟺^+蟺^-违(1S,2S)$ transitions are also investigated, and no evidence for decays proceeding via the $蟺^\mp Z_b^\pm$ or $f_0(980)违(nS)$ intermediate states is found. We measure Born cross sections for the $e^{+}e^{-}\to蟺^{+}蟺^{-}违(nS)$ process that, combined with results from Belle, improve the precision of measurements of the $违(10753)$ mass and width by nearly a factor of two to $(10756.3\pm2.7\pm0.6)$ MeV/$c^2$ and $(29.7\pm8.5\pm1.1)$ MeV, respectively. The relative ratios of the Born cross sections at the $违(10753)$ resonance peak are also reported for the first time. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12021v3-abstract-full').style.display = 'none'; document.getElementById('2401.12021v3-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.02840">arXiv:2401.02840</a> <span> [<a href="https://arxiv.org/pdf/2401.02840">pdf</a>, <a href="https://arxiv.org/format/2401.02840">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> </div> </div> <p class="title is-5 mathjax"> A test of lepton flavor universality with a measurement of $R(D^{*})$ using hadronic $B$ tagging at the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a> , et al. (412 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="2401.02840v1-abstract-short" style="display: inline;"> The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} 蟿^{-} \overline谓_蟿)$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overline谓_{\ell})$, where $\ell$ is an electron or muon, is measured using a Belle~II data sample with an integrated luminosity of $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. Data is collected at th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.02840v1-abstract-full').style.display = 'inline'; document.getElementById('2401.02840v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.02840v1-abstract-full" style="display: none;"> The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} 蟿^{-} \overline谓_蟿)$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overline谓_{\ell})$, where $\ell$ is an electron or muon, is measured using a Belle~II data sample with an integrated luminosity of $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. Data is collected at the $违(\mathrm{4S})$ resonance, and one $B$ meson in the $违(\mathrm{4S})\rightarrow B\overline{B}$ decay is fully reconstructed in hadronic decay modes. The accompanying signal $B$ meson is reconstructed as $\overline{B}\rightarrow D^{*} 蟿^{-}\overline谓_蟿$ using leptonic $蟿$ decays. The normalization decay, $\overline{B}\rightarrow D^{*} \ell^{-} \overline谓_{\ell}$, where $\ell$ is an electron or muon, produces the same observable final state particles. The ratio of branching fractions is extracted in a simultaneous fit to two signal-discriminating variables in both channels and yields $R(D^{*}) = 0.262~_{-0.039}^{+0.041}(\mathrm{stat})~_{-0.032}^{+0.035}(\mathrm{syst})$. This result is consistent with the current world average and with standard model predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.02840v1-abstract-full').style.display = 'none'; document.getElementById('2401.02840v1-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> 5 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">16 pages, 17 figures, submitted to PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-PUB-PH-2024-001 https://docs.belle2.org/record/4057/ ; Belle II Preprint 2024-001; KEK Preprint 2023-47 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.13043">arXiv:2312.13043</a> <span> [<a href="https://arxiv.org/pdf/2312.13043">pdf</a>, <a href="https://arxiv.org/format/2312.13043">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> </div> </div> <p class="title is-5 mathjax"> Search for the $e^+e^-\to畏_{b}(1S)蠅$ and $e^+e^-\to蠂_{b0}(1P)蠅$ processes at $\sqrt{s}=10.745\,\mathrm{GeV}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (397 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="2312.13043v1-abstract-short" style="display: inline;"> We search for the $e^+e^-\to畏_b(1S)蠅$ and $e^+e^-\to蠂_{b0}(1P)蠅$ processes at a center-of-mass energy of 10.745 GeV, which is close to the peak of the $违(10753)$ state. We use data collected by the Belle II experiment during a special run, corresponding to an integrated luminosity of $9.8\,\mathrm{fb}^{-1}$. We reconstruct $蠅\to蟺^+蟺^-蟺^0$ decays and use the $蠅$ meson's recoil mass to search for th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.13043v1-abstract-full').style.display = 'inline'; document.getElementById('2312.13043v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.13043v1-abstract-full" style="display: none;"> We search for the $e^+e^-\to畏_b(1S)蠅$ and $e^+e^-\to蠂_{b0}(1P)蠅$ processes at a center-of-mass energy of 10.745 GeV, which is close to the peak of the $违(10753)$ state. We use data collected by the Belle II experiment during a special run, corresponding to an integrated luminosity of $9.8\,\mathrm{fb}^{-1}$. We reconstruct $蠅\to蟺^+蟺^-蟺^0$ decays and use the $蠅$ meson's recoil mass to search for the signals. We do not find evidence for either process, and set upper limits on the corresponding Born-level cross sections of 2.5 pb and 7.8 pb, respectively, at the 90% confidence level. The $蠂_{b0}(1P)蠅$ limit is the result of a combination of this analysis and a previous search using full reconstruction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.13043v1-abstract-full').style.display = 'none'; document.getElementById('2312.13043v1-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 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">8 pages, 3 figures, submitted to PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-018, KEK Preprint 2023-36 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.02580">arXiv:2312.02580</a> <span> [<a href="https://arxiv.org/pdf/2312.02580">pdf</a>, <a href="https://arxiv.org/ps/2312.02580">ps</a>, <a href="https://arxiv.org/format/2312.02580">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> </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.109.052003">10.1103/PhysRevD.109.052003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for the semileptonic decays $螢_c^0 \to 螢^0\ell^+\ell^-$ at Belle </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Cui%2C+J+X">J. X. Cui</a>, <a href="/search/hep-ex?searchtype=author&query=Li%2C+Y+B">Y. B. Li</a>, <a href="/search/hep-ex?searchtype=author&query=Shen%2C+C+P">C. P. Shen</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bhuyan%2C+B">B. Bhuyan</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Borah%2C+J">J. Borah</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a> , et al. (141 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="2312.02580v2-abstract-short" style="display: inline;"> Using the full data sample of 980 $\mathrm{fb}^{-1}$ collected with the Belle detector at the KEKB asymmetric energy electron-positron collider, we report the results of the first search for the rare semileptonic decays $螢_c^0 \to 螢^0\ell^+\ell^-$ ($\ell=e$ or $渭)$. No significant signals are observed in the $螢^0\ell^+\ell^-$ invariant-mass distributions. Taking the decay $螢_c^0 \to 螢^- 蟺^+$ as th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.02580v2-abstract-full').style.display = 'inline'; document.getElementById('2312.02580v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.02580v2-abstract-full" style="display: none;"> Using the full data sample of 980 $\mathrm{fb}^{-1}$ collected with the Belle detector at the KEKB asymmetric energy electron-positron collider, we report the results of the first search for the rare semileptonic decays $螢_c^0 \to 螢^0\ell^+\ell^-$ ($\ell=e$ or $渭)$. No significant signals are observed in the $螢^0\ell^+\ell^-$ invariant-mass distributions. Taking the decay $螢_c^0 \to 螢^- 蟺^+$ as the normalization mode, we report 90\% credibility upper limits on the branching fraction ratios ${\cal{B}} (螢_c^0 \to 螢^0 e^+ e^-) / {\cal{B}}(螢_c^0\to 螢^-蟺^+) < 6.7 \times 10^{-3}$ and ${\cal{B}} (螢_c^0 \to 螢^0 渭^+ 渭^-) / {\cal{B}}(螢_c^0\to 螢^-蟺^+) < 4.3 \times 10^{-3}$ based on the phase-space assumption for signal decays. The 90\% credibility upper limits on the absolute branching fractions of ${\cal{B}} (螢_c^0 \to 螢^0 e^+ e^-)$ and ${\cal{B}} (螢_c^0 \to 螢^0 渭^+ 渭^-)$ are found to be $9.9 \times 10^{-5}$ and $6.5 \times 10^{-5}$, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.02580v2-abstract-full').style.display = 'none'; document.getElementById('2312.02580v2-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> 5 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">8 pages, 4 figures, submitted to PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-16 KEK Preprint 2023-29 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 109, 052003 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.14647">arXiv:2311.14647</a> <span> [<a href="https://arxiv.org/pdf/2311.14647">pdf</a>, <a href="https://arxiv.org/format/2311.14647">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> </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.109.112006">10.1103/PhysRevD.109.112006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evidence for $B^{+}\to K^{+}谓\bar谓$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (430 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="2311.14647v3-abstract-short" style="display: inline;"> We search for the rare decay $B^{+}\rightarrow K^{+}谓\bar谓$ in a $362\ \rm{fb}^{-1}$ sample of electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying $B$ meson in $违(4S) \to B\kern 0.18em\overline{\kern -0.18em B}{}$ events to suppress background from other decays of the signal $B$ ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.14647v3-abstract-full').style.display = 'inline'; document.getElementById('2311.14647v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.14647v3-abstract-full" style="display: none;"> We search for the rare decay $B^{+}\rightarrow K^{+}谓\bar谓$ in a $362\ \rm{fb}^{-1}$ sample of electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying $B$ meson in $违(4S) \to B\kern 0.18em\overline{\kern -0.18em B}{}$ events to suppress background from other decays of the signal $B$ candidate and light-quark pair production. We validate the measurement with an auxiliary analysis based on a conventional hadronic reconstruction of the accompanying $B$ meson. For background suppression, we exploit distinct signal features using machine learning methods tuned with simulated data. The signal-reconstruction efficiency and background suppression are validated through various control channels. The branching fraction is extracted in a maximum likelihood fit. Our inclusive and hadronic analyses yield consistent results for the $B^{+}\rightarrow K^{+}谓\bar谓$ branching fraction of $\left[2.7\pm 0.5(\mathrm{stat})\pm 0.5(\mathrm{syst})\right] \times 10^{-5}$ and $\left[1.1^{+0.9}_{-0.8}(\mathrm{stat}){}^{+0.8}_{-0.5}(\mathrm{syst})\right] \times 10^{-5}$, respectively. Combining the results, we determine the branching fraction of the decay $B^{+}\rightarrow K^{+}谓\bar谓$ to be $\left[2.3 \pm 0.5(\mathrm{stat})^{+0.5}_{-0.4}(\mathrm{syst})\right]\times 10^{-5}$, providing the first evidence for this decay at $3.5$ standard deviations. The combined result is $2.7$ standard deviations above the standard model expectation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.14647v3-abstract-full').style.display = 'none'; document.getElementById('2311.14647v3-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 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">29 pages, 23 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-017, KEK Preprint 2023-35 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 109, 112006 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.12724">arXiv:2311.12724</a> <span> [<a href="https://arxiv.org/pdf/2311.12724">pdf</a>, <a href="https://arxiv.org/format/2311.12724">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> </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.109.032007">10.1103/PhysRevD.109.032007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for the decay $B_s^0\to J/蠄蟺^0$ at Belle experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Kumar%2C+D">D. Kumar</a>, <a href="/search/hep-ex?searchtype=author&query=Bhuyan%2C+B">B. Bhuyan</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Borah%2C+J">J. Borah</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Browder%2C+T+E">T. E. Browder</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Campajola%2C+M">M. Campajola</a>, <a href="/search/hep-ex?searchtype=author&query=%C4%8Cervenkov%2C+D">D. 膶ervenkov</a> , et al. (142 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="2311.12724v4-abstract-short" style="display: inline;"> We have analyzed 121.4 fb$^{-1}$ of data collected at the $违(5S)$ resonance by the Belle experiment using the KEKB asymmetric-energy $e^+e^-$ collider to search for the decay $B_s^0\to J/蠄蟺^0$. We observe no signal and report an upper limit on the branching fraction $\mathcal{B}(B_s^0\to J/蠄蟺^0)$ of $1.21\times 10^{-5}$ at 90\% confidence level. This result is the most stringent, improving the pre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.12724v4-abstract-full').style.display = 'inline'; document.getElementById('2311.12724v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.12724v4-abstract-full" style="display: none;"> We have analyzed 121.4 fb$^{-1}$ of data collected at the $违(5S)$ resonance by the Belle experiment using the KEKB asymmetric-energy $e^+e^-$ collider to search for the decay $B_s^0\to J/蠄蟺^0$. We observe no signal and report an upper limit on the branching fraction $\mathcal{B}(B_s^0\to J/蠄蟺^0)$ of $1.21\times 10^{-5}$ at 90\% confidence level. This result is the most stringent, improving the previous bound by two orders of magnitude. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.12724v4-abstract-full').style.display = 'none'; document.getElementById('2311.12724v4-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">Published in PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-19, KEK Preprint 2023-33 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 109, 032007 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.07248">arXiv:2311.07248</a> <span> [<a href="https://arxiv.org/pdf/2311.07248">pdf</a>, <a href="https://arxiv.org/format/2311.07248">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> </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.132.211804">10.1103/PhysRevLett.132.211804 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First Measurement of $R(X_{蟿/\ell})$ as an Inclusive Test of the $b \to c 蟿谓$ Anomaly </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a> , et al. (368 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.07248v2-abstract-short" style="display: inline;"> We measure the tau-to-light-lepton ratio of inclusive $B$-meson branching fractions $R(X_{蟿/\ell}) \equiv \mathcal{B}(B\to X 蟿谓)/\mathcal{B}(B \to X \ell 谓)$, where $\ell$ indicates an electron or muon, and thereby test the universality of charged-current weak interactions. We select events that have one fully reconstructed $B$ meson and a charged lepton candidate from $189~\mathrm{fb}^{-1}$ of el… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.07248v2-abstract-full').style.display = 'inline'; document.getElementById('2311.07248v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.07248v2-abstract-full" style="display: none;"> We measure the tau-to-light-lepton ratio of inclusive $B$-meson branching fractions $R(X_{蟿/\ell}) \equiv \mathcal{B}(B\to X 蟿谓)/\mathcal{B}(B \to X \ell 谓)$, where $\ell$ indicates an electron or muon, and thereby test the universality of charged-current weak interactions. We select events that have one fully reconstructed $B$ meson and a charged lepton candidate from $189~\mathrm{fb}^{-1}$ of electron-positron collision data collected with the Belle II detector. We find $R(X_{蟿/\ell}) = 0.228 \pm 0.016~(\mathrm{stat}) \pm 0.036~(\mathrm{syst})$, in agreement with standard-model expectations. This is the first direct measurement of $R(X_{蟿/\ell})$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.07248v2-abstract-full').style.display = 'none'; document.getElementById('2311.07248v2-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 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-016, KEK Preprint 2023-34 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 132, 211804 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.00458">arXiv:2311.00458</a> <span> [<a href="https://arxiv.org/pdf/2311.00458">pdf</a>, <a href="https://arxiv.org/format/2311.00458">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> </div> </div> <p class="title is-5 mathjax"> Measurement of the Ratio of Partial Branching Fractions of Inclusive $\overline{B} \to X_u \ell \overline谓$ to $\overline{B} \to X_{c} \ell \overline谓$ and the Ratio of their Spectra with Hadronic Tagging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Hohmann%2C+M">M. Hohmann</a>, <a href="/search/hep-ex?searchtype=author&query=Urquijo%2C+P">P. Urquijo</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bernlochner%2C+F">F. Bernlochner</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bhuyan%2C+B">B. Bhuyan</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+G">G. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Borah%2C+J">J. Borah</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Browder%2C+T+E">T. E. Browder</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="2311.00458v1-abstract-short" style="display: inline;"> We present a measurement of the ratio of partial branching fractions of the semi-leptonic inclusive decays, $\overline{B} \to X_{u} \ell \overline谓$ to $\overline{B} \to X_{c} \ell \overline谓$, where $\ell = (e, 渭)$, using the full Belle sample of $772 \times 10^{6}$ $B \kern 0.18em\overline{\kern -0.18em B}$ pairs collected at the $违(4S)$ resonance. The ratio is measured via a two-dimensional fit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.00458v1-abstract-full').style.display = 'inline'; document.getElementById('2311.00458v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.00458v1-abstract-full" style="display: none;"> We present a measurement of the ratio of partial branching fractions of the semi-leptonic inclusive decays, $\overline{B} \to X_{u} \ell \overline谓$ to $\overline{B} \to X_{c} \ell \overline谓$, where $\ell = (e, 渭)$, using the full Belle sample of $772 \times 10^{6}$ $B \kern 0.18em\overline{\kern -0.18em B}$ pairs collected at the $违(4S)$ resonance. The ratio is measured via a two-dimensional fit to the squared four-momentum transfer to the lepton pair, and the charged lepton energy in the $B$ meson rest frame, where the latter must be larger than $1$ Ge\kern -0.1em V, covering approximately $86\%$ and $78\%$ of the $\overline{B} \to X_{u} \ell \overline谓$ and $\overline{B} \to X_{c} \ell \overline谓$ phase space, respectively. We find $螖\mathcal{B}(\overline{B} \to X_{u} \ell \overline谓)/ 螖\mathcal{B}(\overline{B} \to X_{c} \ell \overline谓) = 0.0196(1 \pm 8.4\%_{\rm stat} \pm 7.9\%_{\rm syst})$ where the uncertainties are statistical and systematic, respectively. In addition, we report the partial branching fractions separately for charged and neutral $B$ meson decays, and for electron and muon decay channels. We place a limit on isospin breaking in $\overline{B} \to X_{u} \ell \overline谓$ decays, and find no indication of lepton flavor universality violation in either the charmed or charmless mode. Furthermore, we unfold the $\overline{B} \to X_{u} \ell \overline谓$ and $\overline{B} \to X_{c} \ell \overline谓$ yields and report the differential ratio in lepton energy and four-momentum transfer squared. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.00458v1-abstract-full').style.display = 'none'; document.getElementById('2311.00458v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">22 pages, 13 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-17, KEK Preprint 2023-30 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.20286">arXiv:2310.20286</a> <span> [<a href="https://arxiv.org/pdf/2310.20286">pdf</a>, <a href="https://arxiv.org/format/2310.20286">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> </div> </div> <p class="title is-5 mathjax"> Measurement of Angular Coefficients of $\bar{B} \to D^* \ell \bar谓_\ell$: Implications for $|V_{cb}|$ and Tests of Lepton Flavor Universality </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Prim%2C+M+T">M. T. Prim</a>, <a href="/search/hep-ex?searchtype=author&query=Bernlochner%2C+F">F. Bernlochner</a>, <a href="/search/hep-ex?searchtype=author&query=Metzner%2C+F">F. Metzner</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bhardwaj%2C+V">V. Bhardwaj</a>, <a href="/search/hep-ex?searchtype=author&query=Bhuyan%2C+B">B. Bhuyan</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bondar%2C+A">A. Bondar</a>, <a href="/search/hep-ex?searchtype=author&query=Borah%2C+J">J. Borah</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Browder%2C+T+E">T. E. Browder</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a> , et al. (136 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="2310.20286v1-abstract-short" style="display: inline;"> We measure the complete set of angular coefficients $J_i$ for exclusive $\bar{B} \to D^* \ell \bar谓_\ell$ decays ($\ell = e, 渭$). Our analysis uses the full $711\,\mathrm{fb}^{-1}$ Belle data set with hadronic tag-side reconstruction. The results allow us to extract the form factors describing the $B \to D^*$ transition and the Cabibbo-Kobayashi-Maskawa matrix element $|V_{\rm cb}|$. Using recent… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.20286v1-abstract-full').style.display = 'inline'; document.getElementById('2310.20286v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.20286v1-abstract-full" style="display: none;"> We measure the complete set of angular coefficients $J_i$ for exclusive $\bar{B} \to D^* \ell \bar谓_\ell$ decays ($\ell = e, 渭$). Our analysis uses the full $711\,\mathrm{fb}^{-1}$ Belle data set with hadronic tag-side reconstruction. The results allow us to extract the form factors describing the $B \to D^*$ transition and the Cabibbo-Kobayashi-Maskawa matrix element $|V_{\rm cb}|$. Using recent lattice QCD calculations for the hadronic form factors, we find $|V_{\rm cb}| = (41.0 \pm 0.7) \times 10^3 $ using the BGL parameterization, compatible with determinations from inclusive semileptonic decays. We search for lepton flavor universality violation as a function of the hadronic recoil parameter $w$, and investigate the differences of the electron and muon angular distributions. We find no deviation from Standard Model expectations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.20286v1-abstract-full').style.display = 'none'; document.getElementById('2310.20286v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-18; KEK Preprint 2023-32 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.07412">arXiv:2310.07412</a> <span> [<a href="https://arxiv.org/pdf/2310.07412">pdf</a>, <a href="https://arxiv.org/format/2310.07412">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> </div> </div> <p class="title is-5 mathjax"> Search for baryon and lepton number violating decays $\boldsymbol{D \rightarrow p\ell}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Maity%2C+S">S. Maity</a>, <a href="/search/hep-ex?searchtype=author&query=Garg%2C+R">R. Garg</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bhardwaj%2C+V">V. Bhardwaj</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D">DM Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+G">G. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Borah%2C+J">J. Borah</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a>, <a href="/search/hep-ex?searchtype=author&query=Campajola%2C+M">M. Campajola</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="2310.07412v2-abstract-short" style="display: inline;"> We search for the baryon and lepton number violating charm decays, $D \rightarrow p\ell$, where $D$ is either a $D^0$ or a $\overline{D}^0$ and $\ell$ is a muon or an electron, using a data sample of $921\,\mathrm{fb}^{-1}$ collected by the Belle detector at the KEKB asymmetric energy $e^{+}e^{-}$ collider. In the absence of significant signals, we set upper limits on the branching fractions in th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.07412v2-abstract-full').style.display = 'inline'; document.getElementById('2310.07412v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.07412v2-abstract-full" style="display: none;"> We search for the baryon and lepton number violating charm decays, $D \rightarrow p\ell$, where $D$ is either a $D^0$ or a $\overline{D}^0$ and $\ell$ is a muon or an electron, using a data sample of $921\,\mathrm{fb}^{-1}$ collected by the Belle detector at the KEKB asymmetric energy $e^{+}e^{-}$ collider. In the absence of significant signals, we set upper limits on the branching fractions in the range $(5 - 8) \times 10^{-7}$ at a 90\% confidence level, depending on the decay mode. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.07412v2-abstract-full').style.display = 'none'; document.getElementById('2310.07412v2-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 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">6 pages, 4 figures, PHYSICAL REVIEW D 109, L031101 (2024)[DOI: : 10.1103/PhysRevD.109.L031101]</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint: 2023-15, KEK Preprint 2023-20 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.06381">arXiv:2310.06381</a> <span> [<a href="https://arxiv.org/pdf/2310.06381">pdf</a>, <a href="https://arxiv.org/format/2310.06381">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> </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.109.012001">10.1103/PhysRevD.109.012001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of branching fractions and direct $CP$ asymmetries for $B \to K蟺$ and $B\to蟺蟺$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (413 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="2310.06381v2-abstract-short" style="display: inline;"> We report measurements of the branching fractions and direct $\it{CP}$ asymmetries of the decays $B^0 \to K^+ 蟺^-$, $B^+ \to K^+ 蟺^0$, $B^+ \to K^0 蟺^+$, and $B^0 \to K^0 蟺^0$, and use these for testing the standard model through an isospin-based sum rule. In addition, we measure the branching fraction and direct $\it{CP}$ asymmetry of the decay $B^+ \to 蟺^+蟺^0$ and the branching fraction of the d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.06381v2-abstract-full').style.display = 'inline'; document.getElementById('2310.06381v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.06381v2-abstract-full" style="display: none;"> We report measurements of the branching fractions and direct $\it{CP}$ asymmetries of the decays $B^0 \to K^+ 蟺^-$, $B^+ \to K^+ 蟺^0$, $B^+ \to K^0 蟺^+$, and $B^0 \to K^0 蟺^0$, and use these for testing the standard model through an isospin-based sum rule. In addition, we measure the branching fraction and direct $\it{CP}$ asymmetry of the decay $B^+ \to 蟺^+蟺^0$ and the branching fraction of the decay $B^0 \to 蟺^+蟺^-$. The data are collected with the Belle II detector from $e^+e^-$ collisions at the $违(4S)$ resonance produced by the SuperKEKB asymmetric-energy collider and contain $387\times 10^6$ bottom-antibottom meson pairs. Signal yields are determined in two-dimensional fits to background-discriminating variables, and range from 500 to 3900 decays, depending on the channel. We obtain $-0.03 \pm 0.13 \pm 0.04$ for the sum rule, in agreement with the standard model expectation of zero and with a precision comparable to the best existing determinations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.06381v2-abstract-full').style.display = 'none'; document.getElementById('2310.06381v2-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> 5 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-003, KEK Preprint 2022-58 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 109, 012001 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.01170">arXiv:2310.01170</a> <span> [<a href="https://arxiv.org/pdf/2310.01170">pdf</a>, <a href="https://arxiv.org/format/2310.01170">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> </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.108.092013">10.1103/PhysRevD.108.092013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Determination of $|V_{cb}|$ using $\overline{B}^0\to D^{*+}\ell^-\bar谓_\ell$ decays with Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (394 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="2310.01170v2-abstract-short" style="display: inline;"> We determine the CKM matrix-element magnitude $|V_{cb}|$ using $\overline{B}^0\to D^{*+}\ell^-\bar谓_\ell$ decays reconstructed in $189 \, \mathrm{fb}^{-1}$ of collision data collected by the Belle II experiment, located at the SuperKEKB $e^+e^-$ collider. Partial decay rates are reported as functions of the recoil parameter $w$ and three decay angles separately for electron and muon final states.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.01170v2-abstract-full').style.display = 'inline'; document.getElementById('2310.01170v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.01170v2-abstract-full" style="display: none;"> We determine the CKM matrix-element magnitude $|V_{cb}|$ using $\overline{B}^0\to D^{*+}\ell^-\bar谓_\ell$ decays reconstructed in $189 \, \mathrm{fb}^{-1}$ of collision data collected by the Belle II experiment, located at the SuperKEKB $e^+e^-$ collider. Partial decay rates are reported as functions of the recoil parameter $w$ and three decay angles separately for electron and muon final states. We obtain $|V_{cb}|$ using the Boyd-Grinstein-Lebed and Caprini-Lellouch-Neubert parametrizations, and find $|V_{cb}|_\mathrm{BGL}=(40.57\pm 0.31 \pm 0.95\pm 0.58)\times 10^{-3}$ and $|V_{cb}|_\mathrm{CLN}=(40.13 \pm 0.27 \pm 0.93\pm 0.58 )\times 10^{-3}$ with the uncertainties denoting statistical components, systematic components, and components from the lattice QCD input, respectively. The branching fraction is measured to be ${\cal B}(\overline{B}^0\to D^{*+}\ell^-\bar谓_\ell)=(4.922 \pm 0.023 \pm 0.220)\%$. The ratio of branching fractions for electron and muon final states is found to be $0.998 \pm 0.009 \pm 0.020$. In addition, we determine the forward-backward angular asymmetry and the $D^{*+}$ longitudinal polarization fractions. All results are compatible with lepton-flavor universality in the Standard Model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.01170v2-abstract-full').style.display = 'none'; document.getElementById('2310.01170v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-014, KEK Preprint 2023-28 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D 108 (2023) 9, 092013 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.02739">arXiv:2309.02739</a> <span> [<a href="https://arxiv.org/pdf/2309.02739">pdf</a>, <a href="https://arxiv.org/format/2309.02739">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> </div> </div> <p class="title is-5 mathjax"> Search for charged-lepton flavor violation in $违(2S) \to \ell^\mp蟿^\pm$ ($\ell=e,渭$) decays at Belle </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Dhamija%2C+R">R. Dhamija</a>, <a href="/search/hep-ex?searchtype=author&query=Nishida%2C+S">S. Nishida</a>, <a href="/search/hep-ex?searchtype=author&query=Giri%2C+A">A. Giri</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bhardwaj%2C+V">V. Bhardwaj</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Borah%2C+J">J. Borah</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a>, <a href="/search/hep-ex?searchtype=author&query=Branchini%2C+P">P. Branchini</a>, <a href="/search/hep-ex?searchtype=author&query=Browder%2C+T+E">T. E. Browder</a>, <a href="/search/hep-ex?searchtype=author&query=Budano%2C+A">A. Budano</a> , et al. (156 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="2309.02739v2-abstract-short" style="display: inline;"> We report a search for the charged-lepton flavor violation in $违(2S) \to \ell^\mp蟿^\pm$ ($\ell=e,渭$) decays using a $25~\fbi$ $违(2S)$ sample collected by the Belle detector at the KEKB $e^{+}$$e^-$ asymmetric-energy collider. We find no evidence for a signal and set upper limits on the branching fractions ($\mathcal{B}$) at 90\% confidence level. We obtain the most stringent upper limits:… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.02739v2-abstract-full').style.display = 'inline'; document.getElementById('2309.02739v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.02739v2-abstract-full" style="display: none;"> We report a search for the charged-lepton flavor violation in $违(2S) \to \ell^\mp蟿^\pm$ ($\ell=e,渭$) decays using a $25~\fbi$ $违(2S)$ sample collected by the Belle detector at the KEKB $e^{+}$$e^-$ asymmetric-energy collider. We find no evidence for a signal and set upper limits on the branching fractions ($\mathcal{B}$) at 90\% confidence level. We obtain the most stringent upper limits: $\mathcal{B}(\Ytomutau) < 0.23 \times 10^{-6}$ and $\mathcal{B}(\Ytoetau) < 1.12 \times 10^{-6}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.02739v2-abstract-full').style.display = 'none'; document.getElementById('2309.02739v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">11 pages, 3 figures, Submitted to JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-14, KEK Preprint 2023-19 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.08900">arXiv:2308.08900</a> <span> [<a href="https://arxiv.org/pdf/2308.08900">pdf</a>, <a href="https://arxiv.org/format/2308.08900">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> </div> </div> <p class="title is-5 mathjax"> Observation of charmed strange meson pair production in $违(2S)$ decays and in $e^{+}e^{-}$ annihilation at $\sqrt{s} = 10.52~ \rm{GeV}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+Collaboration"> Belle Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Gao%2C+B+S">B. S. Gao</a>, <a href="/search/hep-ex?searchtype=author&query=Zhu%2C+W+J">W. J. Zhu</a>, <a href="/search/hep-ex?searchtype=author&query=Wang%2C+X+L">X. L. Wang</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aulchenko%2C+V">V. Aulchenko</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bhardwaj%2C+V">V. Bhardwaj</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bondar%2C+A">A. Bondar</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Bra%C4%8Dko%2C+M">M. Bra膷ko</a> , et al. (143 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="2308.08900v3-abstract-short" style="display: inline;"> We observe the process $违(2S)\to D_s^{(*)+} D_{sJ}^{-}$ and continuum production $e^+e^- \to D_s^{(*)+} D_{sJ}^- $ at $\sqrt{s} = 10.52$ GeV (and their charge conjugates) using the data samples collected by the Belle detector at KEKB, where $D_{sJ}^-$ is $D_{s1}(2536)^-$ or $D^{*}_{s2}(2573)^-$. Both $D_{sJ}^-$ states are identified through their decay into $\bar{K}\bar{D}^{(*)}$. We measure the p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.08900v3-abstract-full').style.display = 'inline'; document.getElementById('2308.08900v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.08900v3-abstract-full" style="display: none;"> We observe the process $违(2S)\to D_s^{(*)+} D_{sJ}^{-}$ and continuum production $e^+e^- \to D_s^{(*)+} D_{sJ}^- $ at $\sqrt{s} = 10.52$ GeV (and their charge conjugates) using the data samples collected by the Belle detector at KEKB, where $D_{sJ}^-$ is $D_{s1}(2536)^-$ or $D^{*}_{s2}(2573)^-$. Both $D_{sJ}^-$ states are identified through their decay into $\bar{K}\bar{D}^{(*)}$. We measure the products of branching fractions ${\cal B}(违(2S) \to D_{s}^{(*)+} D_{sJ}^-) {\cal B}(D_{sJ}^-\to \bar{K} \bar{D}^{(*)})$ and the Born cross sections $蟽^{\rm Born}(e^+e^- \to D_{s}^{(*)+} D_{sJ}^-) {\cal B}(D_{sJ}^-\to \bar{K} \bar{D}^{(*)})$, and then compare the ratios $R_1 \equiv {\cal B}(违(2S)\to D_{s}^{(*)+} D_{sJ}^-)/{\cal B}(违(2S)\to渭^{+}渭^-)$ for $违(2S)$ decays and $R_2 \equiv 蟽^{\rm Born}(e^+e^-\to D_{s}^{(*)+}D_{sJ}^-)/蟽^{\rm Born}(e^+e^-\to 渭^{+}渭^-)$ for continuum production. We obtain $R_1/R_2 = 9.7\pm 2.3 \pm 1.1$, $6.8 \pm 2.1 \pm 0.8$, $10.2 \pm 3.3 \pm 2.5$, and $3.4 \pm 2.1 \pm 0.5$ for the $D_s^+ D_{s1}(2536)^-$, $D_s^{*+} D_{s1}(2536)^-$, $D_s^+ D_{s2}^{*}(2573)^{-}$, and $D_s^{*+} D_{s2}^{*}(2573)^{-}$ final states in the $D_{sJ}^-\to K^{-} \bar{D}^{(*)0}$ modes, respectively. Therefore, the strong decay is expected to dominate in the $违(2S)\to D_{s}^{(*)+}D_{sJ}^-$ processes. We also measure the ratios of branching fractions ${\cal B}(D_{s1}(2536)^-\to K_S^0 D^{*}(2010)^{-})/{\cal B}(D_{s1}(2536)^-\to K^{-} D^{*}(2007)^0) = 0.48 \pm 0.07 \pm 0.02$ and ${\cal B}(D_{s2}^{*}(2573)^- \to K_S^0 D^-)/{\cal B}(D_{s2}^{*}(2573)^- \to K^{-}D^0) = 0.49 \pm 0.10 \pm 0.02$, which are consistent with isospin symmetry. The second ratio is the first measurement of this quantity. Here, the first uncertainties are statistical and the second are systematic. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.08900v3-abstract-full').style.display = 'none'; document.getElementById('2308.08900v3-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-12, KEK Preprint 2023-16 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.05048">arXiv:2308.05048</a> <span> [<a href="https://arxiv.org/pdf/2308.05048">pdf</a>, <a href="https://arxiv.org/format/2308.05048">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> </div> </div> <p class="title is-5 mathjax"> Measurement of branching-fraction ratios and $CP$ asymmetries in $B^{\pm} \to D_{CP\pm}K^{\pm}$ decays at Belle and Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle%2C+T">The Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (405 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="2308.05048v2-abstract-short" style="display: inline;"> We report results from a study of $B^\pm \rightarrow DK^\pm$ decays followed by $D$ decaying to $CP$~eigenstates, where $D$ indicates a $D^0$ or $\bar{D}^{0}$ meson. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity-triangle angle $蠁_{3}$. The results are based on a combined analysis of the final data set of $772 \times 10^6~B\bar{B}$ pairs collected by the Belle experiment and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.05048v2-abstract-full').style.display = 'inline'; document.getElementById('2308.05048v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.05048v2-abstract-full" style="display: none;"> We report results from a study of $B^\pm \rightarrow DK^\pm$ decays followed by $D$ decaying to $CP$~eigenstates, where $D$ indicates a $D^0$ or $\bar{D}^{0}$ meson. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity-triangle angle $蠁_{3}$. The results are based on a combined analysis of the final data set of $772 \times 10^6~B\bar{B}$ pairs collected by the Belle experiment and a data set of $198 \times 10^6~B\bar{B}$ pairs collected by the Belle~II experiment, both in electron-positron collisions at the $违(4S)$ resonance. We measure the $CP$ asymmetries to be $\mathcal{ A}_{CP +} =~(+12.5 \pm 5.8 \pm 1.4)\% $ and $\mathcal{ A}_{CP -} =~(-16.7 \pm 5.7 \pm 0.6)\%$, and the ratios of branching fractions to be $\mathcal{ R}_{CP+}=~1.164 \pm 0.081 \pm 0.036 $ and $\mathcal{ R}_{CP-} =~1.151 \pm 0.074 \pm 0.019$. The first contribution to the uncertainties is statistical, and the second is systematic. The asymmetries $\mathcal{A}_{CP +}$ and $\mathcal{A}_{CP -}$ have similar magnitudes and opposite signs; their difference corresponds to 3.5~standard deviations. From these values we calculate 68.3\% confidence intervals of ($8.5^{\circ}<蠁_{3}<16.5^{\circ}$) or ($84.5^{\circ}<蠁_{3}<95.5^{\circ}$) or ($163.3^{\circ}<蠁_{3}<171.5^{\circ}$) and $0.321<r_{B}<0.465$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.05048v2-abstract-full').style.display = 'none'; document.getElementById('2308.05048v2-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 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-011;KEK Preprint 2023-9 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.02023">arXiv:2308.02023</a> <span> [<a href="https://arxiv.org/pdf/2308.02023">pdf</a>, <a href="https://arxiv.org/format/2308.02023">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> </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.131.181801">10.1103/PhysRevLett.131.181801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tests of light-lepton universality in angular asymmetries of $B^0 \to D^{*-} \ell 谓$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (394 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="2308.02023v3-abstract-short" style="display: inline;"> We present the first comprehensive tests of light-lepton universality in the angular distributions of semileptonic $B^0$-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universality-violating contributions. We use events where one neutral $B$ is fully reconstructed in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.02023v3-abstract-full').style.display = 'inline'; document.getElementById('2308.02023v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.02023v3-abstract-full" style="display: none;"> We present the first comprehensive tests of light-lepton universality in the angular distributions of semileptonic $B^0$-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universality-violating contributions. We use events where one neutral $B$ is fully reconstructed in $违\left(4S\right)\to{}B \overline{B}$ decays in data corresponding to $189~\mathrm{fb}^{-1}$ integrated luminosity from electron-positron collisions collected with the Belle II detector. We find no significant deviation from the standard model expectations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.02023v3-abstract-full').style.display = 'none'; document.getElementById('2308.02023v3-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 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-013, KEK Preprint 2023-18 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 131, 181801 (Published 31 October 2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.02802">arXiv:2307.02802</a> <span> [<a href="https://arxiv.org/pdf/2307.02802">pdf</a>, <a href="https://arxiv.org/format/2307.02802">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> </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.108.072012">10.1103/PhysRevD.108.072012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $CP$ asymmetries in $B^0\to 蠁K^0_S$ decays with Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (410 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="2307.02802v2-abstract-short" style="display: inline;"> We present a measurement of time-dependent rate asymmetries in $B^0\to 蠁K^0_S$ decays to search for non-standard-model physics in $b\to q \overline{q}s$ transitions. The data sample is collected with the Belle II detector at the SuperKEKB asymmetric-energy $e^{+}e^{-}$ collider in 2019-2022 and contains $(387\pm 6)\times 10^6$ bottom-antibottom mesons from $违(4S)$ resonance decays. We reconstruct… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.02802v2-abstract-full').style.display = 'inline'; document.getElementById('2307.02802v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.02802v2-abstract-full" style="display: none;"> We present a measurement of time-dependent rate asymmetries in $B^0\to 蠁K^0_S$ decays to search for non-standard-model physics in $b\to q \overline{q}s$ transitions. The data sample is collected with the Belle II detector at the SuperKEKB asymmetric-energy $e^{+}e^{-}$ collider in 2019-2022 and contains $(387\pm 6)\times 10^6$ bottom-antibottom mesons from $违(4S)$ resonance decays. We reconstruct $162\pm17$ signal events and extract the charge-parity ($CP$) violating parameters from a fit to the distribution of the proper-decay-time difference of the two $B$ mesons. The measured direct and mixing-induced $CP$ asymmetries are $A=0.31\pm0.20\pm0.05$ and $S=0.54\pm0.26^{+0.06}_{-0.08}$, respectively, where the first uncertainties are statistical and the second are systematic. The results are compatible with the $CP$ asymmetries observed in $b\to c\overline{c} s$ transitions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.02802v2-abstract-full').style.display = 'none'; document.getElementById('2307.02802v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 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">Report number:</span> Belle II preprint: 2023-012, KEK preprint: 2023-10 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 108, 072012 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.12294">arXiv:2306.12294</a> <span> [<a href="https://arxiv.org/pdf/2306.12294">pdf</a>, <a href="https://arxiv.org/format/2306.12294">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> </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.131.121802">10.1103/PhysRevLett.131.121802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for a $蟿^+蟿^-$ resonance in $e^{+}e^{-}\rightarrow 渭^{+}渭^{-} 蟿^+蟿^-$ events with the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (442 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="2306.12294v2-abstract-short" style="display: inline;"> We report the first search for a non-standard-model resonance decaying into $蟿$ pairs in $e^{+}e^{-}\rightarrow 渭^{+}渭^{-} 蟿^+蟿^-$ events in the 3.6-10 GeV/$c^{2}$ mass range. We use a 62.8 fb$^{-1}$ sample of $e^+e^-$ collisions collected at a center-of-mass energy of 10.58 GeV by the Belle II experiment at the SuperKEKB collider. The analysis probes three different models predicting a spin-1 par… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.12294v2-abstract-full').style.display = 'inline'; document.getElementById('2306.12294v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.12294v2-abstract-full" style="display: none;"> We report the first search for a non-standard-model resonance decaying into $蟿$ pairs in $e^{+}e^{-}\rightarrow 渭^{+}渭^{-} 蟿^+蟿^-$ events in the 3.6-10 GeV/$c^{2}$ mass range. We use a 62.8 fb$^{-1}$ sample of $e^+e^-$ collisions collected at a center-of-mass energy of 10.58 GeV by the Belle II experiment at the SuperKEKB collider. The analysis probes three different models predicting a spin-1 particle coupling only to the heavier lepton families, a Higgs-like spin-0 particle that couples preferentially to charged leptons (leptophilic scalar), and an axion-like particle, respectively. We observe no evidence for a signal and set exclusion limits at 90% confidence level on the product of cross section and branching fraction into $蟿$ pairs, ranging from 0.7 fb to 24 fb, and on the couplings of these processes. We obtain world-leading constraints on the couplings for the leptophilic scalar model for masses above 6.5 GeV/$c^2$ and for the axion-like particle model over the entire mass range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.12294v2-abstract-full').style.display = 'none'; document.getElementById('2306.12294v2-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 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KEK preprint: 2022-32, Belle II preprint: 2022-006 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 131, 121802 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.02940">arXiv:2306.02940</a> <span> [<a href="https://arxiv.org/pdf/2306.02940">pdf</a>, <a href="https://arxiv.org/format/2306.02940">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> </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/JHEP09(2023)146">10.1007/JHEP09(2023)146 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $C\!P$ asymmetries and branching-fraction ratios for $B^\pm \to DK^\pm$ and $D蟺^\pm$ with $D\to K^0_{\rm S} K^\pm蟺^\mp$ using Belle and Belle II data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+B+I">Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (386 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="2306.02940v2-abstract-short" style="display: inline;"> We measure $C\!P$ asymmetries and branching-fraction ratios for $B^\pm \to DK^\pm$ and $D蟺^\pm$ decays with $D\to K^0_{\rm S} K^\pm蟺^\mp$, where $D$ is a superposition of $D^0$ and $\bar{D}^0$. We use the full data set of the Belle experiment, containing $772\times 10^6~B\bar{B}$ pairs, and data from the Belle~II experiment, containing $387\times 10^6~B\bar{B}$ pairs, both collected in electron-po… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.02940v2-abstract-full').style.display = 'inline'; document.getElementById('2306.02940v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.02940v2-abstract-full" style="display: none;"> We measure $C\!P$ asymmetries and branching-fraction ratios for $B^\pm \to DK^\pm$ and $D蟺^\pm$ decays with $D\to K^0_{\rm S} K^\pm蟺^\mp$, where $D$ is a superposition of $D^0$ and $\bar{D}^0$. We use the full data set of the Belle experiment, containing $772\times 10^6~B\bar{B}$ pairs, and data from the Belle~II experiment, containing $387\times 10^6~B\bar{B}$ pairs, both collected in electron-positron collisions at the $违(4S)$ resonance. Our results provide model-independent information on the unitarity triangle angle $蠁_3$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.02940v2-abstract-full').style.display = 'none'; document.getElementById('2306.02940v2-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 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">26 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-010; KEK Preprint 2023-8 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of High Energy Physics 09(2023)146 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.02830">arXiv:2306.02830</a> <span> [<a href="https://arxiv.org/pdf/2306.02830">pdf</a>, <a href="https://arxiv.org/format/2306.02830">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> </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.108.L111104">10.1103/PhysRevD.108.L111104 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for a long-lived spin-0 mediator in $b\to s$ transitions at the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P+K">P. K. Behera</a> , et al. (389 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="2306.02830v2-abstract-short" style="display: inline;"> Additional spin-0 particles appear in many extensions of the standard model. We search for long-lived spin-0 particles $S$ in $B$-meson decays mediated by a $b\to s$ quark transition in $e^+e^-$ collisions at the $违(4S)$ resonance at the Belle II experiment. Based on a sample corresponding to an integrated luminosity of $189 \mathrm{\,fb}^{-1}$, we observe no evidence for signal. We set model-inde… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.02830v2-abstract-full').style.display = 'inline'; document.getElementById('2306.02830v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.02830v2-abstract-full" style="display: none;"> Additional spin-0 particles appear in many extensions of the standard model. We search for long-lived spin-0 particles $S$ in $B$-meson decays mediated by a $b\to s$ quark transition in $e^+e^-$ collisions at the $违(4S)$ resonance at the Belle II experiment. Based on a sample corresponding to an integrated luminosity of $189 \mathrm{\,fb}^{-1}$, we observe no evidence for signal. We set model-independent upper limits on the product of branching fractions $\mathrm{Br}(B^0\to K^*(892)^0(\to K^+蟺^-)S)\times \mathrm{Br}(S\to x^+x^-)$ and $\mathrm{Br}(B^+\to K^+S)\times \mathrm{Br}(S\to x^+x^-)$, where $x^+x^-$ indicates $e^+e^-, 渭^+渭^-, 蟺^+蟺^-$, or $K^+K^-$, as functions of $S$ mass and lifetime at the level of $10^{-7}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.02830v2-abstract-full').style.display = 'none'; document.getElementById('2306.02830v2-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-009, KEK Preprint 2023-7 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D 108 (2023) L111104, 2023 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.00365">arXiv:2306.00365</a> <span> [<a href="https://arxiv.org/pdf/2306.00365">pdf</a>, <a href="https://arxiv.org/format/2306.00365">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> </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.131.171803">10.1103/PhysRevLett.131.171803 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precise measurement of the $D^+_s$ lifetime at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P+K">P. K. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a> , et al. (337 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="2306.00365v2-abstract-short" style="display: inline;"> We measure the lifetime of the $D_s^+$ meson using a data sample of 207 fb$^{-1}$ collected by the Belle II experiment running at the SuperKEKB asymmetric-energy $e^+ e^-$ collider. The lifetime is determined by fitting the decay-time distribution of a sample of $116\times 10^3$ $D_s^+\rightarrow蠁蟺^+$ decays. Our result is $蟿^{}_{D^+_s} = (499.5\pm 1.7\pm 0.9)$ fs, where the first uncertainty is s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.00365v2-abstract-full').style.display = 'inline'; document.getElementById('2306.00365v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.00365v2-abstract-full" style="display: none;"> We measure the lifetime of the $D_s^+$ meson using a data sample of 207 fb$^{-1}$ collected by the Belle II experiment running at the SuperKEKB asymmetric-energy $e^+ e^-$ collider. The lifetime is determined by fitting the decay-time distribution of a sample of $116\times 10^3$ $D_s^+\rightarrow蠁蟺^+$ decays. Our result is $蟿^{}_{D^+_s} = (499.5\pm 1.7\pm 0.9)$ fs, where the first uncertainty is statistical and the second is systematic. This result is significantly more precise than previous measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.00365v2-abstract-full').style.display = 'none'; document.getElementById('2306.00365v2-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 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">7 pages, 4 figures, as published in Physical Review Letters</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-007, KEK Preprint 2023-5, Univ. Cincinnati preprint UCHEP-23-03 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 131, 171803 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.19116">arXiv:2305.19116</a> <span> [<a href="https://arxiv.org/pdf/2305.19116">pdf</a>, <a href="https://arxiv.org/format/2305.19116">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> </div> </div> <p class="title is-5 mathjax"> Measurement of the $蟿$-lepton mass with the Belle~II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (396 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="2305.19116v1-abstract-short" style="display: inline;"> We present a measurement of the $蟿$-lepton mass using a sample of about 175 million $e^+e^- \to 蟿^+蟿^-$ events collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider at a center-of-mass energy of $10.579\,\mathrm{Ge\kern -0.1em V}$. This sample corresponds to an integrated luminosity of $190\,\mathrm{fb^{-1}}$. We use the kinematic edge of the $蟿$ pseudomass distribution in the de… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.19116v1-abstract-full').style.display = 'inline'; document.getElementById('2305.19116v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.19116v1-abstract-full" style="display: none;"> We present a measurement of the $蟿$-lepton mass using a sample of about 175 million $e^+e^- \to 蟿^+蟿^-$ events collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider at a center-of-mass energy of $10.579\,\mathrm{Ge\kern -0.1em V}$. This sample corresponds to an integrated luminosity of $190\,\mathrm{fb^{-1}}$. We use the kinematic edge of the $蟿$ pseudomass distribution in the decay ${蟿^-\to蟺^-蟺^+蟺^-谓_蟿}$ and measure the $蟿$ mass to be $1777.09 \pm 0.08 \pm 0.11 \,\mathrm{Me\kern -0.1em V\!/c^2}$, where the first uncertainty is statistical and the second systematic. This result is the most precise to date. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.19116v1-abstract-full').style.display = 'none'; document.getElementById('2305.19116v1-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-008, KEK Preprint 2023-6 </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=Babu%2C+V&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a 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