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is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Ahn%2C+J+K&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Ahn%2C+J+K&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Ahn%2C+J+K&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> <li> <a href="/search/?searchtype=author&query=Ahn%2C+J+K&start=100" class="pagination-link " aria-label="Page 3" aria-current="page">3 </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/2502.09951">arXiv:2502.09951</a> <span> [<a href="https://arxiv.org/pdf/2502.09951">pdf</a>, <a href="https://arxiv.org/format/2502.09951">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 the P_ccbars(4459)0 in Upsilon(1S, 2S) inclusive decays at Belle </p> <p class="authors"> <span class="search-hit">Authors:</span> <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=Alhakami%2C+M">M. Alhakami</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=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=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>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a> , et al. (380 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="2502.09951v1-abstract-short" style="display: inline;"> Using data samples of 102 million Upsilon(1S) events and 158 million Upsilon(2S) events collected by the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we search for [udsccbar] pentaquark states decaying to Jpsi Lambda. Using the first observations of Upsilon(1S, 2S) inclusive decays to Jpsi Lambda, we find evidence of the P_ccbars(4459)0 state with a significance of 3.3 standard… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.09951v1-abstract-full').style.display = 'inline'; document.getElementById('2502.09951v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.09951v1-abstract-full" style="display: none;"> Using data samples of 102 million Upsilon(1S) events and 158 million Upsilon(2S) events collected by the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we search for [udsccbar] pentaquark states decaying to Jpsi Lambda. Using the first observations of Upsilon(1S, 2S) inclusive decays to Jpsi Lambda, we find evidence of the P_ccbars(4459)0 state with a significance of 3.3 standard deviations, including statistical and systematic uncertainties. We measure the mass and width of the Pccbars(4459)0 to be (4471.7 +- 4.8 +- 0.6) MeV/c2 and (21.9 +- 13.1 +- 2.7) MeV, respectively. The branching fractions for P_ccbars(4459)0 production are measured to be B[Upsilon(1S) -> P_ccbars(4459)0/ Pbar_ccbars(4459)0 + anything] = (3.5 +- 2.0 +- 0.2)*10-6 and B[Upsilin(2S) -> P_ccbars(4459)0/ Pbar_ccbars(4459)0 +anything] = (2.9 +- 1.7 +- 0.4)*10-6. The inclusive branching fractions of Upsilon(1S, 2S) -> Jpsi Lambda/Lambdabar are measured to be B[Upsilin(1S) -> Jpsi Lambda/Lambdabar + anything] = (36.9 +- 5.3 +- 2.4)*10-6 and B[Upsilon(2S) -> Jpsi Lambda/Lambdabar + anything] = (22.3 +- 5.7 +- 3.1)*10-6. We measure the visible cross section $蟽(e^+e^- \to J/psi 螞/\bar螞$ + anything) = (90 +- 14 +- 6) fb for the continuum production at $\sqrt{s} = 10.52$ GeV. In all cases, the first uncertainties are statistical and the second are systematic. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.09951v1-abstract-full').style.display = 'none'; document.getElementById('2502.09951v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </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</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2025-002, KEK Preprint 2024-50 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.14827">arXiv:2501.14827</a> <span> [<a href="https://arxiv.org/pdf/2501.14827">pdf</a>, <a href="https://arxiv.org/format/2501.14827">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="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Proposal of the KOTO II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+J+K">Jung Keun Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Antonelli%2C+A">Antonella Antonelli</a>, <a href="/search/hep-ex?searchtype=author&query=Anzivino%2C+G">Giuseppina Anzivino</a>, <a href="/search/hep-ex?searchtype=author&query=Augustine%2C+E">Emile Augustine</a>, <a href="/search/hep-ex?searchtype=author&query=Bandiera%2C+L">Laura Bandiera</a>, <a href="/search/hep-ex?searchtype=author&query=Bian%2C+J">Jianming Bian</a>, <a href="/search/hep-ex?searchtype=author&query=Brizioli%2C+F">Francesco Brizioli</a>, <a href="/search/hep-ex?searchtype=author&query=De+Capua%2C+S">Stefano De Capua</a>, <a href="/search/hep-ex?searchtype=author&query=Carini%2C+G">Gabriella Carini</a>, <a href="/search/hep-ex?searchtype=author&query=Chobanova%2C+V">Veronika Chobanova</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Ambrosio%2C+G">Giancarlo D'Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Dainton%2C+J+B">John Bourke Dainton</a>, <a href="/search/hep-ex?searchtype=author&query=D%C5%91brich%2C+B">Babette D艖brich</a>, <a href="/search/hep-ex?searchtype=author&query=Fry%2C+J">John Fry</a>, <a href="/search/hep-ex?searchtype=author&query=Gianoli%2C+A">Alberto Gianoli</a>, <a href="/search/hep-ex?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ex?searchtype=author&query=Gonzalez%2C+M">Mario Gonzalez</a>, <a href="/search/hep-ex?searchtype=author&query=Gorbahn%2C+M">Martin Gorbahn</a>, <a href="/search/hep-ex?searchtype=author&query=Goudzovski%2C+E">Evgueni Goudzovski</a>, <a href="/search/hep-ex?searchtype=author&query=Homma%2C+M">Mei Homma</a>, <a href="/search/hep-ex?searchtype=author&query=Hsiung%2C+Y+B">Yee B. Hsiung</a>, <a href="/search/hep-ex?searchtype=author&query=Husek%2C+T">Tom谩拧 Husek</a>, <a href="/search/hep-ex?searchtype=author&query=Hutchcroft%2C+D">David Hutchcroft</a>, <a href="/search/hep-ex?searchtype=author&query=Iyer%2C+A">Abhishek Iyer</a>, <a href="/search/hep-ex?searchtype=author&query=Jones%2C+R+W+L">Roger William Lewis Jones</a> , et al. (57 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="2501.14827v1-abstract-short" style="display: inline;"> The KOTO II experiment is proposed to measure the branching ratio of the decay $K_L\to蟺^0谓\bar谓$ at J-PARC. With a beamline to extract long-lived neutral kaons at 5 degrees from a production target, the single event sensitivity of the decay is $8.5\times 10^{-13}$, which is much smaller than the Standard Model prediction $3\times 10^{-11}$. This allows searches for new physics beyond the Standard… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.14827v1-abstract-full').style.display = 'inline'; document.getElementById('2501.14827v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.14827v1-abstract-full" style="display: none;"> The KOTO II experiment is proposed to measure the branching ratio of the decay $K_L\to蟺^0谓\bar谓$ at J-PARC. With a beamline to extract long-lived neutral kaons at 5 degrees from a production target, the single event sensitivity of the decay is $8.5\times 10^{-13}$, which is much smaller than the Standard Model prediction $3\times 10^{-11}$. This allows searches for new physics beyond the Standard Model and the first discovery of the decay with a significance exceeding $5蟽$. As the only experiment proposed in the world dedicated to rare kaon decays, KOTO II will be indispensable in the quest for a complete understanding of flavor dynamics in the quark sector. Moreover, by combining efforts from the kaon community worldwide, we plan to develop the KOTO II detector further and expand the physics reach of the experiment to include measurements of the branching ratio of the $K_L\to蟺^0\ell^+\ell^-$ decays, studies of other $K_L$ decays, and searches for dark photons, axions, and axion-like particles. KOTO II will therefore obtain a comprehensive understanding of $K_L$ decays, providing further constraints on new physics scenarios with existing $K^+$ results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.14827v1-abstract-full').style.display = 'none'; document.getElementById('2501.14827v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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">Submitted to the J-PARC PAC. arXiv admin note: substantial text overlap with arXiv:2110.04462</span> </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 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/10.1088/1674-1137/ad806c">10.1088/1674-1137/ad806c <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Chin. Phys. C 49, 013001 (2025) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.15965">arXiv:2406.15965</a> <span> [<a href="https://arxiv.org/pdf/2406.15965">pdf</a>, <a href="https://arxiv.org/format/2406.15965">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/10.1103/PhysRevD.110.032021">10.1103/PhysRevD.110.032021 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for charmed baryons in the $螞_c^+畏$ system and measurement of the branching fractions of $螞_c(2880)^+$ and $螞_c(2940)^+$ decaying to $螞_c^+畏$ and $pD^0$ relative to $危_c(2455)蟺$ </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=Li%2C+S+X">S. X. 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=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=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=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=Bodrov%2C+D">D. Bodrov</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. (103 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.15965v2-abstract-short" style="display: inline;"> We search for excited charmed baryons in the $螞_c^+畏$ system using a data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. No significant signals are found in the $螞_c^+畏$ mass spectrum, including the known $螞_c(2880)^+$ and $螞_c(2940)^+$. Clear $螞_c(2880)^+$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15965v2-abstract-full').style.display = 'inline'; document.getElementById('2406.15965v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.15965v2-abstract-full" style="display: none;"> We search for excited charmed baryons in the $螞_c^+畏$ system using a data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. No significant signals are found in the $螞_c^+畏$ mass spectrum, including the known $螞_c(2880)^+$ and $螞_c(2940)^+$. Clear $螞_c(2880)^+$ and $螞_c(2940)^+$ signals are observed in the $pD^0$ mass spectrum. We set upper limits at 90\% credibility level on ratios of branching fractions of $螞_c(2880)^+$ and $螞_c(2940)^+$ decaying to $螞_c^+畏$ relative to $危_c(2455)蟺$ of $<0.13$ for the $螞_c(2880)^+$ and $<1.11$ for the $螞_c(2940)^+$. We measure ratios of branching fractions of $螞_c(2880)^+$ and $螞_c(2940)^+$ decaying to $pD^0$ relative to $危_c(2455)蟺$ of $0.75 \pm 0.03(\text{stat.}) \pm 0.07(\text{syst.})$ for the $螞_c(2880)^+$ and $3.59 \pm 0.21(\text{stat.}) \pm 0.56(\text{syst.})$ for the $螞_c(2940)^+$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15965v2-abstract-full').style.display = 'none'; document.getElementById('2406.15965v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 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">10 pages, 4 figures, accepted for publication as a Regular Article in Physical Review D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint: 2024-06;KEK Preprint: 2024-15 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 110, 032021 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.11390">arXiv:2405.11390</a> <span> [<a href="https://arxiv.org/pdf/2405.11390">pdf</a>, <a href="https://arxiv.org/format/2405.11390">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 Two-Body $B$ Meson Decays to $螞^{0}$ and $惟^{(*)0}_{c}$ </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=Savinov%2C+V">V. Savinov</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</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=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=Banerjee%2C+S">Sw. Banerjee</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=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=%C4%8Cervenkov%2C+D">D. 膶ervenkov</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+M+-">M. -C. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P">P. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Cheon%2C+B+G">B. G. Cheon</a>, <a href="/search/hep-ex?searchtype=author&query=Cho%2C+K">K. Cho</a> , et al. (124 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.11390v1-abstract-short" style="display: inline;"> We report the results of the first search for Standard Model and baryon-number-violating two-body decays of the neutral $B$ mesons to $螞^{0}$ and $惟^{(*)0}_c$ using 711~${\rm fb^{-1}}$ of data collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We observe no evidence of signal from any such decays and set 95\% confidence-level upper limits o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.11390v1-abstract-full').style.display = 'inline'; document.getElementById('2405.11390v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.11390v1-abstract-full" style="display: none;"> We report the results of the first search for Standard Model and baryon-number-violating two-body decays of the neutral $B$ mesons to $螞^{0}$ and $惟^{(*)0}_c$ using 711~${\rm fb^{-1}}$ of data collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We observe no evidence of signal from any such decays and set 95\% confidence-level upper limits on the products of $B^0$ and $\bar{B}^0$ branching fractions for these two-body decays with $\mathcal{B}(惟_{c}^{0} \to 蟺^+ 惟^-)$ in the range between 9.5~$\times 10^{-8}$ and 31.2~$\times 10^{-8}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.11390v1-abstract-full').style.display = 'none'; document.getElementById('2405.11390v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 May, 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">6 pages, 2 figures, submitted to PRD(L)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2024-04, KEK Preprint 2024-5 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.04340">arXiv:2403.04340</a> <span> [<a href="https://arxiv.org/pdf/2403.04340">pdf</a>, <a href="https://arxiv.org/format/2403.04340">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 a pentaquark state decaying into $pJ/蠄$ in $违(1,2S)$ inclusive decays 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=Dong%2C+X">X. Dong</a>, <a href="/search/hep-ex?searchtype=author&query=Zhang%2C+H+Y">H. Y. Zhang</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=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=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=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=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=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=%C4%8Cervenkov%2C+D">D. 膶ervenkov</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+M+-">M. -C. Chang</a> , et al. (139 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.04340v4-abstract-short" style="display: inline;"> Using the data samples of 102 million $违(1S)$ and 158 million $违(2S)$ events collected by the Belle detector, we search for a pentaquark state in the $pJ/蠄$ final state from $违(1,2S)$ inclusive decays. Here, the charge-conjugate $\bar{p}J/蠄$ is included. We observe clear $pJ/蠄$ production in $违(1,2S)$ decays and measure the branching fractions to be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.04340v4-abstract-full').style.display = 'inline'; document.getElementById('2403.04340v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.04340v4-abstract-full" style="display: none;"> Using the data samples of 102 million $违(1S)$ and 158 million $违(2S)$ events collected by the Belle detector, we search for a pentaquark state in the $pJ/蠄$ final state from $违(1,2S)$ inclusive decays. Here, the charge-conjugate $\bar{p}J/蠄$ is included. We observe clear $pJ/蠄$ production in $违(1,2S)$ decays and measure the branching fractions to be $\mathcal{B}[违(1S) \to pJ/蠄+ anything] = [4.27 \pm 0.16(stat.) \pm 0.20(syst.)] \times 10^{-5}$ and $\mathcal{B}[违(2S) \to pJ/蠄+ anything] = [3.59 \pm 0.14(stat.) \pm 0.16(syst.)] \times 10^{-5}$. We also measure the cross section of inclusive $pJ/蠄$ production in $e^+e^-$ annihilation to be $蟽(e^+e^- \to pJ/蠄+ anything) = [57.5 \pm 2.1 (stat.) \pm 2.5(syst.)]$~fb at $\sqrt{s} = 10.52~\hbox{GeV}$ using an 89.5~fb$^{-1}$ continuum data sample. There is no significant $P_c(4312)^+$, $P_c(4440)^+$ or $P_c(4457)^+$ signal found in the $pJ/蠄$ final states in $违(1,2S)$ inclusive decays. We determine the upper limits of $\mathcal{B}[违(1,2S)\to P_c^{+} + anything] \cdot \mathcal{B}(P_c^{+}\to pJ/蠄)$ to be at the $10^{-6}$ level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.04340v4-abstract-full').style.display = 'none'; document.getElementById('2403.04340v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 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> Belle Preprint 2024-02, KEK Preprint 2023-54 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.04759">arXiv:2305.04759</a> <span> [<a href="https://arxiv.org/pdf/2305.04759">pdf</a>, <a href="https://arxiv.org/format/2305.04759">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 $蟿^- \to \ell^-蠁$ decays in 2019-2021 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Andricek%2C+L">L. Andricek</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=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=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=Bacher%2C+S">S. Bacher</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=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (555 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.04759v3-abstract-short" style="display: inline;"> We report a search for lepton-flavor-violating decays $蟿^- \to \ell^- 蠁$ ($\ell^- =e^-,渭^-$) at the Belle II experiment, using a sample of electron-positron data produced at the SuperKEKB collider in 2019-2021 and corresponding to an integrated luminosity of 190 fb$^{-1}$. We use a new untagged selection for $e^+e^- \to 蟿^+蟿^-$ events, where the signal $蟿$ is searched for as a neutrinoless final s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.04759v3-abstract-full').style.display = 'inline'; document.getElementById('2305.04759v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.04759v3-abstract-full" style="display: none;"> We report a search for lepton-flavor-violating decays $蟿^- \to \ell^- 蠁$ ($\ell^- =e^-,渭^-$) at the Belle II experiment, using a sample of electron-positron data produced at the SuperKEKB collider in 2019-2021 and corresponding to an integrated luminosity of 190 fb$^{-1}$. We use a new untagged selection for $e^+e^- \to 蟿^+蟿^-$ events, where the signal $蟿$ is searched for as a neutrinoless final state of a single charged lepton and a $蠁$ meson and the other $蟿$ is not reconstructed in any specific decay mode, in contrast to previous measurements by the BaBar and Belle experiments. We find no evidence for $蟿^- \to \ell^- 蠁$ decays and obtain upper limits on the branching fractions at 90% confidence level of 23 $\times 10^{-8}$ and 9.7$\times 10^{-8}$ for $蟿^- \rightarrow e^-蠁$ and $蟿^- \rightarrow 渭^-蠁$, respectively <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.04759v3-abstract-full').style.display = 'none'; document.getElementById('2305.04759v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 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> BELLE2-CONF-2023-004 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.01321">arXiv:2305.01321</a> <span> [<a href="https://arxiv.org/pdf/2305.01321">pdf</a>, <a href="https://arxiv.org/format/2305.01321">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 ${B\to D^{(*)} K^- K^{0}_S}$ decays using the 2019-2022 Belle II data sample </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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Andricek%2C+L">L. Andricek</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=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=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=Bacher%2C+S">S. Bacher</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=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (555 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.01321v1-abstract-short" style="display: inline;"> We present a measurement of the branching fractions of four $B^{0,-}\to D^{(*)+,0} K^- K^{0}_S$ decay modes. The measurement is based on data from SuperKEKB electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector and corresponding to an integrated luminosity of ${362~\text{fb}^{-1}}$. The event yields are extracted from fits to the distributions of the difference… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.01321v1-abstract-full').style.display = 'inline'; document.getElementById('2305.01321v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.01321v1-abstract-full" style="display: none;"> We present a measurement of the branching fractions of four $B^{0,-}\to D^{(*)+,0} K^- K^{0}_S$ decay modes. The measurement is based on data from SuperKEKB electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector and 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 to separate signal and background, and are efficiency-corrected as a function of the invariant mass of the $K^-K_S^0$ system. We find the branching fractions to be: \[ \text{B}(B^-\to D^0K^-K_S^0)=(1.89\pm 0.16\pm 0.10)\times 10^{-4}, \] \[ \text{B}(\overline B{}^0\to D^+K^-K_S^0)=(0.85\pm 0.11\pm 0.05)\times 10^{-4},\] \[ \text{B}(B^-\to D^{*0}K^-K_S^0)=(1.57\pm 0.27\pm 0.12)\times 10^{-4}, \] \[ \text{B}(\overline B{}^0\to D^{*+}K^-K_S^0)=(0.96\pm 0.18\pm 0.06)\times 10^{-4},\] where the first uncertainty is statistical and the second systematic. 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 $\text{B}(B^-\to D^0K^-K_S^0)$ compared to previous measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.01321v1-abstract-full').style.display = 'none'; document.getElementById('2305.01321v1-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 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> BELLE2-CONF-2023-003 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.02127">arXiv:2302.02127</a> <span> [<a href="https://arxiv.org/pdf/2302.02127">pdf</a>, <a href="https://arxiv.org/ps/2302.02127">ps</a>, <a href="https://arxiv.org/format/2302.02127">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.107.112011">10.1103/PhysRevD.107.112011 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of the lineshape of $X(3872)$ using $B$ decays to $D^0\overline{D}{}^{*0}K$ </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=Hirata%2C+H">H. Hirata</a>, <a href="/search/hep-ex?searchtype=author&query=Iijima%2C+T">T. Iijima</a>, <a href="/search/hep-ex?searchtype=author&query=Kato%2C+Y">Y. Kato</a>, <a href="/search/hep-ex?searchtype=author&query=Tanida%2C+K">K. Tanida</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</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=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=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=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bodrov%2C+D">D. Bodrov</a> , et al. (188 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="2302.02127v2-abstract-short" style="display: inline;"> We present a study of the $X(3872)$ lineshape in the decay $B \to X(3872)K\to D^0\overline{D}{}^{*0}K$ using a data sample of $772\times 10^6$ $B\overline{B}$ pairs collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The peak near the threshold in the $D^0\overline{D}{}^{*0}$ invariant mass spectrum is fitted using a relativistic Breit-Wigner… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.02127v2-abstract-full').style.display = 'inline'; document.getElementById('2302.02127v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.02127v2-abstract-full" style="display: none;"> We present a study of the $X(3872)$ lineshape in the decay $B \to X(3872)K\to D^0\overline{D}{}^{*0}K$ using a data sample of $772\times 10^6$ $B\overline{B}$ pairs collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The peak near the threshold in the $D^0\overline{D}{}^{*0}$ invariant mass spectrum is fitted using a relativistic Breit-Wigner lineshape. We determine the mass and width parameters to be $m = 3873.71 ^{+0.56}_{-0.50} ({\rm stat}) \pm0.13 ({\rm syst}) ~{\rm MeV}/c^2$ and $螕_0 = 5.2 ^{+2.2}_{-1.5} ({\rm stat}) \pm 0.4 ({\rm syst})~{\rm MeV}$, respectively. The branching fraction is found to be ${\cal B} (B^+\to X(3872)K^+) \times {\cal{B}}(X(3872) \to D^0\overline{D}{}^{*0}) = (0.97 ^{+0.21}_{-0.18} ({\rm stat}) \pm 0.10 ({\rm syst})) \times 10^{-4}$. The signal from $B^0$ decays is observed for the first time with $5.2蟽$ significance, and the ratio of branching fractions between charged and neutral $B$ decays is measured to be ${\cal B}(B^0\to X(3872)K^0)/{\cal B}(B^+ \to X(3872)K^+) = 1.34^{+0.47}_{-0.40} ({\rm stat}) ^{+0.10}_{-0.12} ({\rm syst})$. The peak is also studied using a Flatt茅 lineshape. We determine the lower limit on the $D\overline{D}{}^{*}$ coupling constant $g$ to be $0.075$ at 95% credibility in the parameter region where the ratio of $g$ to the mass difference from the $D^0\overline{D}{}^{*0}$ threshold is equal to $-15.11~{\rm GeV}^{-1}$, as measured by LHCb. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.02127v2-abstract-full').style.display = 'none'; document.getElementById('2302.02127v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">submitted to Phys. Rev D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2023-03, KEK Preprint 2022-52 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 107, 112011 (2003) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.04716">arXiv:2301.04716</a> <span> [<a href="https://arxiv.org/pdf/2301.04716">pdf</a>, <a href="https://arxiv.org/format/2301.04716">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 $B^{0} \rightarrow D^{*-} \ell^{+} 谓_{\ell}$ branching ratio and $|V_{cb}|$ with a fully reconstructed accompanying $B$ meson in 2019-2021 Belle II data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</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=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (561 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="2301.04716v1-abstract-short" style="display: inline;"> We present a measurement of the $B^{0} \rightarrow D^{*-} \ell^{+} 谓_{\ell}$ ($\ell=e,渭$) branching ratio and of the CKM parameter $|V_{cb}|$ using signal decays accompanied by a fully reconstructed $B$ meson. The Belle II data set of electron-positron collisions at the $违(4S)$ resonance, corresponding to 189.3$\,$fb$^{-1}$ of integrated luminosity, is analyzed. With the Caprini-Lellouch-Neubert f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.04716v1-abstract-full').style.display = 'inline'; document.getElementById('2301.04716v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.04716v1-abstract-full" style="display: none;"> We present a measurement of the $B^{0} \rightarrow D^{*-} \ell^{+} 谓_{\ell}$ ($\ell=e,渭$) branching ratio and of the CKM parameter $|V_{cb}|$ using signal decays accompanied by a fully reconstructed $B$ meson. The Belle II data set of electron-positron collisions at the $违(4S)$ resonance, corresponding to 189.3$\,$fb$^{-1}$ of integrated luminosity, is analyzed. With the Caprini-Lellouch-Neubert form factor parameterization, the parameters $畏_{\rm EW} F(1) |V_{cb}|$ and $蟻^{2}$ are extracted, where $畏_{\rm EW}$ is an electroweak correction, $F(1)$ is a normalization factor and $蟻^{2}$ is a form factor shape parameter. We reconstruct 516 signal decays and thereby obtain $\mathcal{B} (B^{0} \rightarrow D^{*-} \ell^{+} 谓_{\ell} ) = \left(5.27 \pm 0.22~\rm{\left(stat\right)} \pm 0.38~\rm{\left(syst\right)}\right) \%$, $畏_{EW} F(1) |V_{cb}| \times 10^{3} = 34.6 \pm 1.8~\rm{\left(stat\right)} \pm 1.7~\rm{\left(syst\right)}$, and $蟻^{2} = 0.94 \pm 0.18~\rm{\left(stat\right)} \pm 0.11~\rm{\left(syst\right)}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.04716v1-abstract-full').style.display = 'none'; document.getElementById('2301.04716v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2212.04062">arXiv:2212.04062</a> <span> [<a href="https://arxiv.org/pdf/2212.04062">pdf</a>, <a href="https://arxiv.org/format/2212.04062">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.107.032008">10.1103/PhysRevD.107.032008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the mass and width of the $螞_c(2625)^+$ and the branching ratios of $螞_c(2625)^+ \to 危_c^{0}蟺^{+}$ and $螞_c(2625)^+ \to 危_c^{++}蟺^{-}$ </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=Wang%2C+D">D. Wang</a>, <a href="/search/hep-ex?searchtype=author&query=Yelton%2C+J">J. Yelton</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</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=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=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=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. (159 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="2212.04062v2-abstract-short" style="display: inline;"> Using the entire data sample of $980\,\textrm{fb}^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy collider, we report the measurement of the mass, width, and the relative branching ratios of the $螞_c(2625)^+$ charmed baryon. The mass difference between $螞_c(2625)^+$ and $螞_c^+$ is measured to be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.04062v2-abstract-full').style.display = 'inline'; document.getElementById('2212.04062v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.04062v2-abstract-full" style="display: none;"> Using the entire data sample of $980\,\textrm{fb}^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy collider, we report the measurement of the mass, width, and the relative branching ratios of the $螞_c(2625)^+$ charmed baryon. The mass difference between $螞_c(2625)^+$ and $螞_c^+$ is measured to be $M(螞_c(2625)^{+}) - M(螞_c^{+}) = 341.518 \pm 0.006 \pm 0.049\ \mathrm{MeV}/\mathit{c}^2$. The upper limit on the width is measured to be $螕(螞_c(2625)^+) < 0.52\,\mathrm{MeV}/\textit{c}^2$ at 90\% credibility level. Based on a full Dalitz plot fit, branching ratios with respect to the mode $螞_c(2625)^+ \to 螞_c^+ 蟺^+ 蟺^-$ are measured to be $\frac{\mathcal{B}(螞_c(2625)^+ \to 危_c^{0} 蟺^{+})} {\mathcal{B}(螞_c(2625)^+ \to 螞_c^+ 蟺^{+} 蟺^{-})} = (5.19 \pm 0.23 \pm 0.40) \%$ and $\frac{\mathcal{B}(螞_c(2625)^+ \to 危_c^{++} 蟺^{-})} {\mathcal{B}(螞_c(2625)^+ \to 螞_c^+ 蟺^{+} 蟺^{-})} = (5.13 \pm 0.26 \pm 0.32) \%$. These measurements can be used to further constrain the parameters of the underlying theoretical models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.04062v2-abstract-full').style.display = 'none'; document.getElementById('2212.04062v2-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 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2022-28 KEK Preprint 2022-37 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.15270">arXiv:2211.15270</a> <span> [<a href="https://arxiv.org/pdf/2211.15270">pdf</a>, <a href="https://arxiv.org/format/2211.15270">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"> Reconstruction of $B \to 蟻\ell 谓_\ell$ decays identified using hadronic decays of the recoil $B$ meson in 2019 -- 2021 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a> , et al. (560 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="2211.15270v1-abstract-short" style="display: inline;"> We present results on the semileptonic decays $B^0 \to 蟻^- \ell^+ 谓_\ell$ and $B^+ \to 蟻^0 \ell^+ 谓_\ell$ in a sample corresponding to 189.9/fb of Belle II data at the SuperKEKB $e^- e^+$ collider. Signal decays are identified using full reconstruction of the recoil $B$ meson in hadronic final states. We determine the total branching fractions via fits to the distributions of the square of the "mi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.15270v1-abstract-full').style.display = 'inline'; document.getElementById('2211.15270v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.15270v1-abstract-full" style="display: none;"> We present results on the semileptonic decays $B^0 \to 蟻^- \ell^+ 谓_\ell$ and $B^+ \to 蟻^0 \ell^+ 谓_\ell$ in a sample corresponding to 189.9/fb of Belle II data at the SuperKEKB $e^- e^+$ collider. Signal decays are identified using full reconstruction of the recoil $B$ meson in hadronic final states. We determine the total branching fractions via fits to the distributions of the square of the "missing" mass in the event and the dipion mass in the signal candidate and find ${\mathcal{B}(B^0\to蟻^-\ell^+ 谓_\ell) = (4.12 \pm 0.64(\mathrm{stat}) \pm 1.16(\mathrm{syst})) \times 10^{-4}}$ and ${\mathcal{B}({B^+\to蟻^0\ell^+谓_\ell}) = (1.77 \pm 0.23 (\mathrm{stat}) \pm 0.36 (\mathrm{syst})) \times 10^{-4}}$ where the dominant systematic uncertainty comes from modeling the nonresonant $B\to (蟺蟺)\ell^+谓_\ell$ contribution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.15270v1-abstract-full').style.display = 'none'; document.getElementById('2211.15270v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-029 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.11151">arXiv:2211.11151</a> <span> [<a href="https://arxiv.org/pdf/2211.11151">pdf</a>, <a href="https://arxiv.org/format/2211.11151">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.130.151903">10.1103/PhysRevLett.130.151903 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First Observation of $螞蟺^+$ and $螞蟺^-$ Signals near the $\bar{K}N (I=1)$ Mass Threshold in $螞_c^+\rightarrow螞蟺^+蟺^+蟺^-$ Decay </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=Ma%2C+Y">Y. Ma</a>, <a href="/search/hep-ex?searchtype=author&query=Yelton%2C+J">J. Yelton</a>, <a href="/search/hep-ex?searchtype=author&query=Tanida%2C+K">K. Tanida</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</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=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=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=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> , et al. (173 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="2211.11151v2-abstract-short" style="display: inline;"> Using the data sample of 980 fb$^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we present the results of an investigation of the $螞蟺^+$ and $螞蟺^-$ invariant mass distributions looking for substructure in the decay $螞_c^+\rightarrow螞蟺^+蟺^+蟺^-$. We find a significant signal in each mass dis\ tribution. When interpreted as resonances, we find for t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.11151v2-abstract-full').style.display = 'inline'; document.getElementById('2211.11151v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.11151v2-abstract-full" style="display: none;"> Using the data sample of 980 fb$^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we present the results of an investigation of the $螞蟺^+$ and $螞蟺^-$ invariant mass distributions looking for substructure in the decay $螞_c^+\rightarrow螞蟺^+蟺^+蟺^-$. We find a significant signal in each mass dis\ tribution. When interpreted as resonances, we find for the $螞蟺^+$ ($螞蟺^-$) combination a mass of $1434.3 \pm 0.6 (\mathrm{stat}) \pm 0.9(\mathrm{syst})$ MeV/$c^2$ [$1438.5 \pm 0.9 (\mathrm{stat}) \pm 2.5(\mathrm{syst})$ MeV/$c^2$], an intrinsic width of $11.5 \pm 2.8 (\mathrm{stat}) \pm 5.3(\mathrm{syst})$ MeV/$c^2$ [$33.0 \pm 7.5 (\mathrm{stat}) \pm 23.6(\mathrm{syst})$ MeV/$c^2$] with a significance of 7.5$蟽$ (6.2$蟽$). As these two signals are very close to the $\bar{K}N$ threshold, we also investigate the possibility of a $\bar{K}N$ cusp, and find that \ we cannot discriminate between these two interpretations due to the limited size of the data sample. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.11151v2-abstract-full').style.display = 'none'; document.getElementById('2211.11151v2-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 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2022-29; KEK Preprint 2022-38 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 130, 151903 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.13143">arXiv:2210.13143</a> <span> [<a href="https://arxiv.org/pdf/2210.13143">pdf</a>, <a href="https://arxiv.org/format/2210.13143">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 $|V_{cb}|$ from $B\to D\ell谓$ decays using 2019-2021 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a> , et al. (570 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.13143v1-abstract-short" style="display: inline;"> We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $V_{cb}$ using $B\to D\ell谓$ decays. The result is based on $e^+e^-\to违(4S)$ data recorded by the Belle II detector corresponding to 189.2/fb of integrated luminosity. The semileptonic decays $B^0\to D^-(\to K^+蟺^-蟺^-)\ell^+谓_\ell$ and $B^+\to\bar D^0(\to K^+蟺^-)\ell^+谓_\ell$ are reconstructed, where… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.13143v1-abstract-full').style.display = 'inline'; document.getElementById('2210.13143v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.13143v1-abstract-full" style="display: none;"> We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $V_{cb}$ using $B\to D\ell谓$ decays. The result is based on $e^+e^-\to违(4S)$ data recorded by the Belle II detector corresponding to 189.2/fb of integrated luminosity. The semileptonic decays $B^0\to D^-(\to K^+蟺^-蟺^-)\ell^+谓_\ell$ and $B^+\to\bar D^0(\to K^+蟺^-)\ell^+谓_\ell$ are reconstructed, where $\ell$ is either electron or a muon. The second $B$ meson in the $违(4S)$ event is not explicitly reconstructed. Using the diamond-frame method, we determine the $B$ meson four-momentum and thus the hadronic recoil. We extract the partial decay rates as functions of $w$ and perform a fit to the decay form-factor and the CKM parameter $|V_{cb}|$ using the BGL parameterization of the form factor and lattice QCD input from the FNAL/MILC and HPQCD collaborations. We obtain $畏_{EW}|V_{cb}|=(38.53\pm 1.15)\times 10^{-3}$, where $畏_{EW}$ is an electroweak correction, and the error accounts for theoretical and experimental sources of uncertainty. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.13143v1-abstract-full').style.display = 'none'; document.getElementById('2210.13143v1-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 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.10220">arXiv:2210.10220</a> <span> [<a href="https://arxiv.org/pdf/2210.10220">pdf</a>, <a href="https://arxiv.org/format/2210.10220">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 photon-energy spectrum in inclusive $B\rightarrow X_{s}纬$ decays identified using hadronic decays of the recoil $B$ meson in 2019-2021 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a> , et al. (573 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.10220v1-abstract-short" style="display: inline;"> We measure the photon-energy spectrum in radiative bottom-meson ($B$) decays into inclusive final states involving a strange hadron and a photon. We use SuperKEKB electron-positron collisions corresponding to $189~\mathrm{fb}^{-1}$ of integrated luminosity collected at the $违(4S)$ resonance by the Belle II experiment. The partner $B$ candidates are fully reconstructed using a large number of hadro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.10220v1-abstract-full').style.display = 'inline'; document.getElementById('2210.10220v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.10220v1-abstract-full" style="display: none;"> We measure the photon-energy spectrum in radiative bottom-meson ($B$) decays into inclusive final states involving a strange hadron and a photon. We use SuperKEKB electron-positron collisions corresponding to $189~\mathrm{fb}^{-1}$ of integrated luminosity collected at the $违(4S)$ resonance by the Belle II experiment. The partner $B$ candidates are fully reconstructed using a large number of hadronic channels. The $B \rightarrow X_s 纬$ partial branching fractions are measured as a function of photon energy in the signal $B$ meson rest frame in eight bins above $1.8~\mathrm{GeV}$. The background-subtracted signal yield for this photon energy region is $343 \pm 122$ events. Integrated branching fractions for three photon energy thresholds of $1.8~\mathrm{GeV}$, $2.0~\mathrm{GeV}$, and $2.1~\mathrm{GeV}$ are also reported, and found to be in agreement with world averages. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.10220v1-abstract-full').style.display = 'none'; document.getElementById('2210.10220v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-018 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.04224">arXiv:2210.04224</a> <span> [<a href="https://arxiv.org/pdf/2210.04224">pdf</a>, <a href="https://arxiv.org/format/2210.04224">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 untagged $B^0\to蟺^- \ell^+ 谓_{\ell}$ decays using 2019-2021 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=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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (568 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.04224v2-abstract-short" style="display: inline;"> We present an analysis of the charmless semileptonic decay $B^0\to蟺^- \ell^+ 谓_{\ell}$, where $\ell = e, 渭$, from 198.0 million pairs of $B\bar{B}$ mesons recorded by the Belle II detector at the SuperKEKB electron-positron collider. The decay is reconstructed without identifying the partner $B$ meson. The partial branching fractions are measured independently for $B^0\to蟺^- e^+ 谓_{e}$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.04224v2-abstract-full').style.display = 'inline'; document.getElementById('2210.04224v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.04224v2-abstract-full" style="display: none;"> We present an analysis of the charmless semileptonic decay $B^0\to蟺^- \ell^+ 谓_{\ell}$, where $\ell = e, 渭$, from 198.0 million pairs of $B\bar{B}$ mesons recorded by the Belle II detector at the SuperKEKB electron-positron collider. The decay is reconstructed without identifying the partner $B$ meson. The partial branching fractions are measured independently for $B^0\to蟺^- e^+ 谓_{e}$ and $B^0\to蟺^- 渭^+ 谓_渭$ as functions of $q^{2}$ (momentum transfer squared), using 3896 $B^0\to蟺^- e^+ 谓_{e}$ and 5466 $B^0\to蟺^- 渭^+ 谓_渭$ decays. The total branching fraction is found to be $(1.426 \pm 0.056 \pm 0.125) \times 10^{-4}$ for $B^0\to蟺^- \ell^+ 谓_{\ell}$ decays, where the uncertainties are statistical and systematic, respectively. By fitting the measured partial branching fractions as functions of $q^{2}$, together with constraints on the nonperturbative hadronic contribution from lattice QCD calculations, the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element $V_{ub}$, $(3.55 \pm 0.12 \pm 0.13 \pm 0.17) \times 10^{-3}$, is extracted. 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('2210.04224v2-abstract-full').style.display = 'none'; document.getElementById('2210.04224v2-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 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.01995">arXiv:2210.01995</a> <span> [<a href="https://arxiv.org/pdf/2210.01995">pdf</a>, <a href="https://arxiv.org/ps/2210.01995">ps</a>, <a href="https://arxiv.org/format/2210.01995">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.107.032004">10.1103/PhysRevD.107.032004 <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 of $螞_c^+\to{}pK_S^0K_S^0$ and $螞_c^+\to{}pK_S^0畏$ 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=Li%2C+L+K">L. K. Li</a>, <a href="/search/hep-ex?searchtype=author&query=Kinoshita%2C+K">K. Kinoshita</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</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=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=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=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> , et al. (182 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.01995v3-abstract-short" style="display: inline;"> We present a study of a singly Cabibbo-suppressed decay $螞_c^+\to{}pK_S^0K_S^0$ and a Cabibbo-favored decay $螞_c^+\to{}pK_S^0畏$ based on 980 $\rm fb^{-1}$ of data collected by the Belle detector, operating at the KEKB energy-asymmetric $e^+e^-$ collider. We measure their branching fractions relative to $螞_c^+\to{}pK_S^0$:… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.01995v3-abstract-full').style.display = 'inline'; document.getElementById('2210.01995v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.01995v3-abstract-full" style="display: none;"> We present a study of a singly Cabibbo-suppressed decay $螞_c^+\to{}pK_S^0K_S^0$ and a Cabibbo-favored decay $螞_c^+\to{}pK_S^0畏$ based on 980 $\rm fb^{-1}$ of data collected by the Belle detector, operating at the KEKB energy-asymmetric $e^+e^-$ collider. We measure their branching fractions relative to $螞_c^+\to{}pK_S^0$: $\mathcal{B}(螞_c^+\to{}pK_S^0K_S^0)/\mathcal{B}(螞_c^+\to{}pK_S^0)={(1.48 \pm 0.08 \pm 0.04)\times 10^{-2}}$ and $\mathcal{B}(螞_c^+\to{}pK_S^0畏)/\mathcal{B}(螞_c^+\to{}pK_S^0)={(2.73\pm 0.06\pm 0.13)\times 10^{-1}}$. Combining with the world average $\mathcal{B}(螞_c^+\to{}pK_S^0)$, we have the absolute branching fractions: $\mathcal{B}(螞_c^+\to{}pK_S^0K_S^0) = {(2.35\pm 0.12\pm 0.07 \pm 0.12 )\times 10^{-4}}$ and $\mathcal{B}(螞_c^+\to{}pK_S^0畏) = {(4.35\pm 0.10\pm 0.20 \pm 0.22 )\times 10^{-3}}$. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the uncertainty on $\mathcal{B}(螞_c^+\to{}pK_S^0)$. The mode $螞_c^+\to{}pK_S^0K_S^0$ is observed for the first time and has a statistical significance of $>\!10蟽$. The branching fraction of $螞_c^+\to{}pK_S^0畏$ has been measured with a threefold improvement in precision over previous results and is found to be consistent with the world average. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.01995v3-abstract-full').style.display = 'none'; document.getElementById('2210.01995v3-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 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 figures, accepted by Phys. Rev. D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2022-24, KEK Preprint 2022-33, Univ. Cincinnati preprint UCHEP-22-05 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 107, 032004 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.11019">arXiv:2209.11019</a> <span> [<a href="https://arxiv.org/pdf/2209.11019">pdf</a>, <a href="https://arxiv.org/ps/2209.11019">ps</a>, <a href="https://arxiv.org/format/2209.11019">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.130.111801">10.1103/PhysRevLett.130.111801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for the Pair Production of Dark Particles $X$ with $K_L^0 \to XX$, $X \to 纬纬$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Lin%2C+C">C. Lin</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=Choi%2C+J+M">J. M. Choi</a>, <a href="/search/hep-ex?searchtype=author&query=Farrington%2C+M+S">M. S. Farrington</a>, <a href="/search/hep-ex?searchtype=author&query=Gonzalez%2C+M">M. Gonzalez</a>, <a href="/search/hep-ex?searchtype=author&query=Grethen%2C+N">N. Grethen</a>, <a href="/search/hep-ex?searchtype=author&query=Hsiung%2C+Y+B">Y. B. Hsiung</a>, <a href="/search/hep-ex?searchtype=author&query=Inagaki%2C+T">T. Inagaki</a>, <a href="/search/hep-ex?searchtype=author&query=Kamiji%2C+I">I. Kamiji</a>, <a href="/search/hep-ex?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/hep-ex?searchtype=author&query=Kim%2C+J+L">J. L. Kim</a>, <a href="/search/hep-ex?searchtype=author&query=Kim%2C+H+M">H. M. Kim</a>, <a href="/search/hep-ex?searchtype=author&query=Kawata%2C+K">K. Kawata</a>, <a href="/search/hep-ex?searchtype=author&query=Kitagawa%2C+A">A. Kitagawa</a>, <a href="/search/hep-ex?searchtype=author&query=Komatsubara%2C+T+K">T. K. Komatsubara</a>, <a href="/search/hep-ex?searchtype=author&query=Kotera%2C+K">K. Kotera</a>, <a href="/search/hep-ex?searchtype=author&query=Lee%2C+S+K">S. K. Lee</a>, <a href="/search/hep-ex?searchtype=author&query=Lee%2C+J+W">J. W. Lee</a>, <a href="/search/hep-ex?searchtype=author&query=Lim%2C+G+Y">G. Y. Lim</a>, <a href="/search/hep-ex?searchtype=author&query=Luo%2C+Y">Y. Luo</a>, <a href="/search/hep-ex?searchtype=author&query=Matsumura%2C+T">T. Matsumura</a>, <a href="/search/hep-ex?searchtype=author&query=Nakagiri%2C+K">K. Nakagiri</a>, <a href="/search/hep-ex?searchtype=author&query=Nanjo%2C+H">H. Nanjo</a>, <a href="/search/hep-ex?searchtype=author&query=Nomura%2C+T">T. Nomura</a>, <a href="/search/hep-ex?searchtype=author&query=Ono%2C+K">K. Ono</a> , et al. (17 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2209.11019v3-abstract-short" style="display: inline;"> We present the first search for the pair production of dark particles $X$ via $K_L^0\to XX$ with $X$ decaying into two photons using the data collected by the KOTO experiment. No signal was observed in the mass range of 40 - 110 MeV/c$^2$ and 210 - 240 MeV/c$^2$. This sets upper limits on the branching fractions as $\mathcal{B}(K_L^0 \to XX)$ $<$ (1-4) $\times$ 10$^{-7}$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.11019v3-abstract-full').style.display = 'inline'; document.getElementById('2209.11019v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.11019v3-abstract-full" style="display: none;"> We present the first search for the pair production of dark particles $X$ via $K_L^0\to XX$ with $X$ decaying into two photons using the data collected by the KOTO experiment. No signal was observed in the mass range of 40 - 110 MeV/c$^2$ and 210 - 240 MeV/c$^2$. This sets upper limits on the branching fractions as $\mathcal{B}(K_L^0 \to XX)$ $<$ (1-4) $\times$ 10$^{-7}$ and $\mathcal{B}(K_L^0 \to XX)$ $<$ (1-2) $\times$ 10$^{-6}$ at the 90% confidence level for the two mass regions, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.11019v3-abstract-full').style.display = 'none'; document.getElementById('2209.11019v3-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.09547">arXiv:2209.09547</a> <span> [<a href="https://arxiv.org/pdf/2209.09547">pdf</a>, <a href="https://arxiv.org/format/2209.09547">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 decay-time dependent $CP$ violation in $B^0 \rightarrow K^0_S K^0_S K^0_S$ using 2019--2021 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a> , et al. (570 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2209.09547v2-abstract-short" style="display: inline;"> We report a measurement of decay-time dependent $CP$-violating parameters in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $(198.0 \pm 3.0) \times 10^6\ B\overline{B}$ pairs collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy $e^+e^-$ collider. The observed mixing-induced and direct $CP$ violation parameters are… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.09547v2-abstract-full').style.display = 'inline'; document.getElementById('2209.09547v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.09547v2-abstract-full" style="display: none;"> We report a measurement of decay-time dependent $CP$-violating parameters in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $(198.0 \pm 3.0) \times 10^6\ B\overline{B}$ pairs collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy $e^+e^-$ collider. The observed mixing-induced and direct $CP$ violation parameters are $\mathcal{S} = -1.86\ _{-0.46}^{+0.91}~{\rm (stat)} \pm 0.09~{\rm (syst)}$ and $\mathcal{A} = -0.22\ _{-0.27}^{+0.30}~{\rm (stat)} \pm 0.04~{\rm (syst)}$, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.09547v2-abstract-full').style.display = 'none'; document.getElementById('2209.09547v2-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 4 figures; added a reference</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-007 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.08583">arXiv:2209.08583</a> <span> [<a href="https://arxiv.org/pdf/2209.08583">pdf</a>, <a href="https://arxiv.org/format/2209.08583">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/JHEP01(2023)055">10.1007/JHEP01(2023)055 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evidence for the singly Cabibbo-suppressed decay $惟^0_c\to螢^-蟺^+$ and search for $惟^0_c\to螢^-K^+$ and $惟^-K^+$ decays 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=Han%2C+X">X. Han</a>, <a href="/search/hep-ex?searchtype=author&query=Jia%2C+S">S. Jia</a>, <a href="/search/hep-ex?searchtype=author&query=Yuan%2C+L">L. Yuan</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=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=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=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=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> , et al. (148 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2209.08583v2-abstract-short" style="display: inline;"> Using a data sample of 980 fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we study for the first time the singly Cabibbo-suppressed decays $惟^0_c\to螢^{-}蟺^{+}$ and $惟^-K^+$ and the doubly Cabibbo-suppressed decay $惟^0_c\to 螢^- K^{+}$. Evidence for an $惟^0_c$ signal in the $惟^0_c\to螢^-蟺^+$ mode is reported with a significance of $4.5蟽$ including systema… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.08583v2-abstract-full').style.display = 'inline'; document.getElementById('2209.08583v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.08583v2-abstract-full" style="display: none;"> Using a data sample of 980 fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we study for the first time the singly Cabibbo-suppressed decays $惟^0_c\to螢^{-}蟺^{+}$ and $惟^-K^+$ and the doubly Cabibbo-suppressed decay $惟^0_c\to 螢^- K^{+}$. Evidence for an $惟^0_c$ signal in the $惟^0_c\to螢^-蟺^+$ mode is reported with a significance of $4.5蟽$ including systematic uncertainties. The ratio of branching fractions to the normalization mode $惟_c^0\to 惟^-蟺^+$ is measured to be $${\cal B}(惟_{c}^{0} \to 螢^{-} 蟺^{+} )/{\cal B}(惟_c^0\to 惟^-蟺^+)=0.253\pm 0.053({\rm stat.})\pm 0.030({\rm syst.}).$$ No significant signals of $惟^0_c\to螢^-K^+$ and $惟^-K^+$ modes are found. The upper limits at $90\%$ confidence level on ratios of branching fractions are determined to be $${\cal B}(惟_{c}^{0} \to 螢^{-} K ^{+})/{\cal B}(惟_c^0\to 惟^-蟺^+) < 0.070$$ and $${\cal B}(惟_{c}^{0} \to 惟^{-}K^{+})/{\cal B}(惟_c^0\to 惟^-蟺^+) < 0.29.$$ <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.08583v2-abstract-full').style.display = 'none'; document.getElementById('2209.08583v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 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 2022-20; KEK Preprint 2022-28 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.05154">arXiv:2209.05154</a> <span> [<a href="https://arxiv.org/pdf/2209.05154">pdf</a>, <a href="https://arxiv.org/format/2209.05154">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 branching fractions and $CP$ asymmetries of $B^+ \rightarrow 蟺^+ 蟺^0$ and $B^+ \rightarrow K^+ 蟺^0$ decays in 2019-2021 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</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=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a> , et al. (562 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2209.05154v2-abstract-short" style="display: inline;"> We determine the branching fractions ${\mathcal{B}}$ and $CP$ asymmetries ${\mathcal{A}_{\it CP}}$ of the decays $B^+ \rightarrow 蟺^+ 蟺^0$ and $B^+ \rightarrow K^+ 蟺^0$. The results are based on a data set containing 198 million bottom-antibottom meson pairs corresponding to an integrated luminosity of $190\;\text{fb}^{-1}$ recorded by the Belle II detector in energy-asymmetric electron-positron c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.05154v2-abstract-full').style.display = 'inline'; document.getElementById('2209.05154v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.05154v2-abstract-full" style="display: none;"> We determine the branching fractions ${\mathcal{B}}$ and $CP$ asymmetries ${\mathcal{A}_{\it CP}}$ of the decays $B^+ \rightarrow 蟺^+ 蟺^0$ and $B^+ \rightarrow K^+ 蟺^0$. The results are based on a data set containing 198 million bottom-antibottom meson pairs corresponding to an integrated luminosity of $190\;\text{fb}^{-1}$ recorded by the Belle II detector in energy-asymmetric electron-positron collisions at the $违(4S)$ resonance. We measure ${\mathcal{B}(B^+ \rightarrow 蟺^+ 蟺^0) = (6.12 \pm 0.53 \pm 0.53)\times 10^{-6}}$, ${\mathcal{B}(B^+ \rightarrow K^+ 蟺^0) = (14.30 \pm 0.69 \pm 0.79)\times 10^{-6}}$, ${\mathcal{A}_{\it CP}(B^+ \rightarrow 蟺^+ 蟺^0) = -0.085 \pm 0.085 \pm 0.019}$, and ${\mathcal{A}_{\it CP}(B^+ \rightarrow K^+ 蟺^0) = 0.014 \pm 0.047 \pm 0.010}$, where the first uncertainties are statistical and the second are systematic. These results improve a previous Belle II measurement and agree with the world averages. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.05154v2-abstract-full').style.display = 'none'; document.getElementById('2209.05154v2-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.10825">arXiv:2208.10825</a> <span> [<a href="https://arxiv.org/pdf/2208.10825">pdf</a>, <a href="https://arxiv.org/format/2208.10825">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/10.1103/PhysRevD.107.032003">10.1103/PhysRevD.107.032003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of branching fractions of $螞_c^+ \to 危^+ 畏$ and $螞_c^+ \to 危^+ 畏'$ and asymmetry parameters of $螞_c^+ \to 危^+ 蟺^0$, $螞_c^+ \to 危^+ 畏$, and $螞_c^+ \to 危^+ 畏'$ </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=Li%2C+S+X">S. X. 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=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=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=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=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> , et al. (146 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2208.10825v2-abstract-short" style="display: inline;"> We report a study of $螞_c^+ \to 危^+ 蟺^0$, $螞_c^+ \to 危^+ 畏$, and $螞_c^+ \to 危^+ 畏'$ using the data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The branching fractions relative to $螞_c^+ \to 危^+ 蟺^0$ are measured as:… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.10825v2-abstract-full').style.display = 'inline'; document.getElementById('2208.10825v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.10825v2-abstract-full" style="display: none;"> We report a study of $螞_c^+ \to 危^+ 蟺^0$, $螞_c^+ \to 危^+ 畏$, and $螞_c^+ \to 危^+ 畏'$ using the data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The branching fractions relative to $螞_c^+ \to 危^+ 蟺^0$ are measured as: $\mathcal{B}_{螞_c^+ \to 危^+ 畏}/\mathcal{B}_{螞_c^+ \to 危^+ 蟺^0}=0.25 \pm 0.03 \pm 0.01$ and $\mathcal{B}_{螞_c^+ \to 危^+ 畏'}/\mathcal{B}_{螞_c^+ \to 危^+ 蟺^0}=0.33 \pm 0.06 \pm 0.02$. Using $\mathcal{B}_{螞_c^+ \to 危^+ 蟺^0}=(1.25 \pm 0.10)\%$, we obtain $\mathcal{B}_{螞_c^+ \to 危^+ 畏}=(3.14 \pm 0.35 \pm 0.11 \pm 0.25)\times10^{-3}$ and $\mathcal{B}_{螞_c^+ \to 危^+ 畏'}=(4.16 \pm 0.75 \pm 0.21 \pm 0.33)\times10^{-3}$. Here the uncertainties are statistical, systematic, and from $\mathcal{B}_{螞_c^+ \to 危^+ 蟺^0}$, respectively. The ratio of the branching fraction of $螞_c^+ \to 危^+ 畏'$ with respect to that of $螞_c^+ \to 危^+ 畏$ is measured to be $\mathcal{B}_{螞_c^+ \to 危^+ 畏'}/\mathcal{B}_{螞_c^+ \to 危^+ 畏}=1.34 \pm 0.28 \pm 0.06$. We update the asymmetry parameter of $螞_c^+ \to 危^+ 蟺^0$, $伪_{危^+ 蟺^0} = -0.48 \pm 0.02 \pm 0.02$, with a considerably improved precision. The asymmetry parameters of $螞_c^+ \to 危^+ 畏$ and $螞_c^+ \to 危^+ 畏'$ are measured to be $伪_{危^+ 畏} = -0.99 \pm 0.03 \pm 0.05$ and $伪_{危^+ 畏'} = -0.46 \pm 0.06 \pm 0.03$ for the first time. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.10825v2-abstract-full').style.display = 'none'; document.getElementById('2208.10825v2-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 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 8 figures; accepted for publication as a Regular Article in Physical Review D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2022-19; KEK Preprint 2022-25 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 107, 032003 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.03554">arXiv:2208.03554</a> <span> [<a href="https://arxiv.org/pdf/2208.03554">pdf</a>, <a href="https://arxiv.org/format/2208.03554">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 and Longitudinal Polarization in $B^0 \to 蟻^+ 蟻^-$ 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</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=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a> , et al. (564 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2208.03554v1-abstract-short" style="display: inline;"> We present a measurement of the branching fraction and longitudinal polarization of $B^0 \to 蟻^+ 蟻^-$ decays. SuperKEKB electron-positron collision data corresponding to 189~fb$^{-1}$ of integrated luminosity and containing $198 \times 10^6 B\bar{B}$ pairs collected with the Belle II detector are used. We obtain \begin{eqnarray*} \mathcal{B}(B^0\to蟻^+蟻^-) &=& [2.67\pm0.28\,(\mathrm{stat})\,\pm0.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.03554v1-abstract-full').style.display = 'inline'; document.getElementById('2208.03554v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.03554v1-abstract-full" style="display: none;"> We present a measurement of the branching fraction and longitudinal polarization of $B^0 \to 蟻^+ 蟻^-$ decays. SuperKEKB electron-positron collision data corresponding to 189~fb$^{-1}$ of integrated luminosity and containing $198 \times 10^6 B\bar{B}$ pairs collected with the Belle II detector are used. We obtain \begin{eqnarray*} \mathcal{B}(B^0\to蟻^+蟻^-) &=& [2.67\pm0.28\,(\mathrm{stat})\,\pm0.28\,(\mathrm{syst})] \times 10^{-5}, \end{eqnarray*} \begin{eqnarray*} f_L &=& 0.956\pm0.035\,(\mathrm{stat})\,\pm 0.033\,(\mathrm{syst}), \end{eqnarray*} These results are consistent with previous measurements and can be used to constrain penguin pollution and to extract the quark-mixing angle $蠁_2$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.03554v1-abstract-full').style.display = 'none'; document.getElementById('2208.03554v1-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 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.11275">arXiv:2207.11275</a> <span> [<a href="https://arxiv.org/pdf/2207.11275">pdf</a>, <a href="https://arxiv.org/format/2207.11275">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"> Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J/蠄K$ 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a> , et al. (570 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.11275v1-abstract-short" style="display: inline;"> We report a study of $B \to J/蠄(\ell^{+}\ell^{-})K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $违(4S)$ resonance. The data were collected by the Belle II experiment at the SuperKEKB asymmetric-energy collider during 2019-2021, corresponding to an integrated luminosity of $189$ fb$^{-1}$. The measured quantities are the branching fractions (… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.11275v1-abstract-full').style.display = 'inline'; document.getElementById('2207.11275v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.11275v1-abstract-full" style="display: none;"> We report a study of $B \to J/蠄(\ell^{+}\ell^{-})K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $违(4S)$ resonance. The data were collected by the Belle II experiment at the SuperKEKB asymmetric-energy collider during 2019-2021, corresponding to an integrated luminosity of $189$ fb$^{-1}$. The measured quantities are the branching fractions (${\mathcal B}$) of the decay channels $B^{+} \to J/蠄(e^{+}e^{-})K^{+}$, $B^{+} \to J/蠄(渭^{+}渭^{-}) K^{+}$, $B^{0} \to J/蠄(e^{+}e^{-}) K^{0}_{S}$, and $B^{0} \to J/蠄(渭^{+}渭^{-})K^{0}_{S}$; the lepton-flavor-dependent isospin asymmetries for the electron [$A_{I}\left(B \to J/蠄(e^{+}e^{-}) K\right)$] and muon [$A_{I}\left(B \to J/蠄(渭^{+} 渭^{-}) K\right)$] channels; and the ratios of branching fractions between the muon and electron channels for the charged [$R_{K^{+}}\left(J/蠄\right)$] and neutral kaon [$R_{K^{0}}\left(J/蠄\right)$] case. The measurements are consistent with the world-average values. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.11275v1-abstract-full').style.display = 'none'; document.getElementById('2207.11275v1-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 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.03090">arXiv:2207.03090</a> <span> [<a href="https://arxiv.org/pdf/2207.03090">pdf</a>, <a href="https://arxiv.org/ps/2207.03090">ps</a>, <a href="https://arxiv.org/format/2207.03090">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/10.1016/j.physletb.2024.139224">10.1016/j.physletb.2024.139224 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of $惟(2012)^- \to 螢(1530)\bar{K}$ and measurement of the effective couplings of $惟(2012)^-$ to $螢(1530)\bar{K}$ and $螢\bar{K}$ </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=Jia%2C+S">S. Jia</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=Yuan%2C+C+Z">C. Z. Yuan</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=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=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=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=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>, <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>, <a href="/search/hep-ex?searchtype=author&query=Cho%2C+H+E">H. E. Cho</a>, <a href="/search/hep-ex?searchtype=author&query=Choi%2C+S+-">S. -K. Choi</a>, <a href="/search/hep-ex?searchtype=author&query=Choi%2C+Y">Y. Choi</a>, <a href="/search/hep-ex?searchtype=author&query=Choudhury%2C+S">S. Choudhury</a>, <a href="/search/hep-ex?searchtype=author&query=De+Pietro%2C+G">G. De Pietro</a> , et al. (95 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.03090v3-abstract-short" style="display: inline;"> Using $违(1S)$, $违(2S)$, and $违(3S)$ data collected by the Belle detector, we discover a new three-body decay, $惟(2012)^-\to螢(1530)\bar K\to螢蟺\bar K$, with a significance of 5.2~$蟽$. The mass of the $惟(2012)^-$ is $(2012.5\pm0.7\pm0.5)$ MeV and its effective couplings to $螢(1530)\bar{K}$ and $螢\bar{K}$ are $(39^{+31}_{-39}\pm9)\times10^{-2}$ and $(1.7\pm0.3\pm0.3)\times10^{-2}$, where the first unc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.03090v3-abstract-full').style.display = 'inline'; document.getElementById('2207.03090v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.03090v3-abstract-full" style="display: none;"> Using $违(1S)$, $违(2S)$, and $违(3S)$ data collected by the Belle detector, we discover a new three-body decay, $惟(2012)^-\to螢(1530)\bar K\to螢蟺\bar K$, with a significance of 5.2~$蟽$. The mass of the $惟(2012)^-$ is $(2012.5\pm0.7\pm0.5)$ MeV and its effective couplings to $螢(1530)\bar{K}$ and $螢\bar{K}$ are $(39^{+31}_{-39}\pm9)\times10^{-2}$ and $(1.7\pm0.3\pm0.3)\times10^{-2}$, where the first uncertainties are statistical and the second are systematic. The ratio of the branching fraction for the three-body decay to that for the two-body decay to $螢\bar{K}$ is $0.99\pm0.26\pm0.06$, assuming isospin symmetry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.03090v3-abstract-full').style.display = 'none'; document.getElementById('2207.03090v3-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures, add more Omega(2012) three-body decay modes, updated version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2024-08; KEK Preprint 2024-25 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 860 (2025) 139224 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.15227">arXiv:2206.15227</a> <span> [<a href="https://arxiv.org/pdf/2206.15227">pdf</a>, <a href="https://arxiv.org/ps/2206.15227">ps</a>, <a href="https://arxiv.org/format/2206.15227">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.130.071802">10.1103/PhysRevLett.130.071802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the $螞_c^+$ lifetime </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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=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=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=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=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=Bennett%2C+J+V">J. V. Bennett</a>, <a href="/search/hep-ex?searchtype=author&query=Bernieri%2C+E">E. Bernieri</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="2206.15227v3-abstract-short" style="display: inline;"> An absolute measurement of the $螞^{+}_c$ lifetime is reported using $螞_c^+\rightarrow pK^-蟺^+$ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the $违(4S)$ resonance, is $207.2~\mbox{fb}^{-1}$. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.15227v3-abstract-full').style.display = 'inline'; document.getElementById('2206.15227v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.15227v3-abstract-full" style="display: none;"> An absolute measurement of the $螞^{+}_c$ lifetime is reported using $螞_c^+\rightarrow pK^-蟺^+$ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the $违(4S)$ resonance, is $207.2~\mbox{fb}^{-1}$. The result, $蟿(螞^{+}_c) = 203.20 \pm 0.89 \,\mathrm{(stat)} \pm 0.77 \,\mathrm{(syst)}$ fs, is the most precise measurement to date and is consistent with previous determinations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.15227v3-abstract-full').style.display = 'none'; document.getElementById('2206.15227v3-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication in PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2022-003, KEK Preprint 2022-13 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 130, 071802 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.12362">arXiv:2206.12362</a> <span> [<a href="https://arxiv.org/pdf/2206.12362">pdf</a>, <a href="https://arxiv.org/format/2206.12362">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"> Angular analysis of $B^+ \to 蟻^+蟻^0$ decays reconstructed in 2019, 2020, and 2021 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a> , et al. (570 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="2206.12362v1-abstract-short" style="display: inline;"> We report on a Belle II measurement of the branching fraction ($\mathcal{B}$), longitudinal polarization fraction ($f_L$), and CP asymmetry ($\mathcal{A}_{CP}$) of $B^+\to 蟻^+蟻^0$ decays. We reconstruct $B^+\to 蟻^+(\to 蟺^+蟺^0(\to 纬纬))蟻^0(\to 蟺^+蟺^-)$ decays in a sample of SuperKEKB electron-positron collisions collected by the Belle II experiment in 2019, 2020, and 2021 at the $违$(4S) resonance an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.12362v1-abstract-full').style.display = 'inline'; document.getElementById('2206.12362v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.12362v1-abstract-full" style="display: none;"> We report on a Belle II measurement of the branching fraction ($\mathcal{B}$), longitudinal polarization fraction ($f_L$), and CP asymmetry ($\mathcal{A}_{CP}$) of $B^+\to 蟻^+蟻^0$ decays. We reconstruct $B^+\to 蟻^+(\to 蟺^+蟺^0(\to 纬纬))蟻^0(\to 蟺^+蟺^-)$ decays in a sample of SuperKEKB electron-positron collisions collected by the Belle II experiment in 2019, 2020, and 2021 at the $违$(4S) resonance and corresponding to 190 fb$^{-1}$ of integrated luminosity. We fit the distributions of the difference between expected and observed $B$ candidate energy, continuum-suppression discriminant, dipion masses, and decay angles of the selected samples, to determine a signal yield of $345 \pm 31$ events. The signal yields are corrected for efficiencies determined from simulation and control data samples to obtain $\mathcal{B}(B^+ \to 蟻^+蟻^0) = [23.2^{+\ 2.2}_{-\ 2.1} (\rm stat) \pm 2.7 (\rm syst)]\times 10^{-6}$, $f_L = 0.943 ^{+\ 0.035}_{-\ 0.033} (\rm stat)\pm 0.027(\rm syst)$, and $\mathcal{A}_{CP}=-0.069 \pm 0.068(\rm stat) \pm 0.060 (\rm syst)$. The results agree with previous measurements. This is the first measurement of $\mathcal{A}_{CP}$ in $B^+\to 蟻^+蟻^0$ decays reported by Belle II. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.12362v1-abstract-full').style.display = 'none'; document.getElementById('2206.12362v1-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 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-005 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.08280">arXiv:2206.08280</a> <span> [<a href="https://arxiv.org/pdf/2206.08280">pdf</a>, <a href="https://arxiv.org/format/2206.08280">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 branching fraction of the $B^0 \to K_S^0 蟺^0 纬$ decay using 190 fb$^{-1}$ of 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a> , et al. (570 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="2206.08280v1-abstract-short" style="display: inline;"> We report the measurement of the branching fraction of the $B^0 \to K_S^0 蟺^0 纬$ decay in $e^+ e^- \to 违(4S) \to B \overline{B}$ data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy collider and corresponding to 190 fb$^{-1}$ of integrated luminosity. The signal yield is measured to be $121\pm 29\,\hbox{(stat.)}$, leading to the branching fraction… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.08280v1-abstract-full').style.display = 'inline'; document.getElementById('2206.08280v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.08280v1-abstract-full" style="display: none;"> We report the measurement of the branching fraction of the $B^0 \to K_S^0 蟺^0 纬$ decay in $e^+ e^- \to 违(4S) \to B \overline{B}$ data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy collider and corresponding to 190 fb$^{-1}$ of integrated luminosity. The signal yield is measured to be $121\pm 29\,\hbox{(stat.)}$, leading to the branching fraction ${\cal B}\left(B^0 \to K_S^0 蟺^0 纬\right) = \left(7.3 \pm 1.8\,\hbox{(stat.)} \pm 1.0\,\hbox{(syst.)} \right)\times 10^{-6}$, which agrees with the known value. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.08280v1-abstract-full').style.display = 'none'; document.getElementById('2206.08280v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-2022-008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.08102">arXiv:2206.08102</a> <span> [<a href="https://arxiv.org/pdf/2206.08102">pdf</a>, <a href="https://arxiv.org/format/2206.08102">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 Exclusive $B \to 蟺e^+ 谓_e$ Decays with Hadronic Full-event-interpretation Tagging in 189.3 fb$^{-1}$ of 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a> , et al. (570 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="2206.08102v2-abstract-short" style="display: inline;"> We present a reconstruction of the semileptonic decays $B^0 \to 蟺^- e^+ 谓_e$ and $B^+ \to 蟺^0 e^+ 谓_e$ in a sample corresponding to 189.3 fb$^{-1}$ of Belle II data, using events where the partner $B$-meson is reconstructed from a large variety of hadronic channels via a tagging algorithm known as the full-event-interpretation. We determine the partial branching fractions in three bins of the squa… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.08102v2-abstract-full').style.display = 'inline'; document.getElementById('2206.08102v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.08102v2-abstract-full" style="display: none;"> We present a reconstruction of the semileptonic decays $B^0 \to 蟺^- e^+ 谓_e$ and $B^+ \to 蟺^0 e^+ 谓_e$ in a sample corresponding to 189.3 fb$^{-1}$ of Belle II data, using events where the partner $B$-meson is reconstructed from a large variety of hadronic channels via a tagging algorithm known as the full-event-interpretation. We determine the partial branching fractions in three bins of the squared momentum transfer to the leptonic system using fits to the distribution of the square of the missing mass. The partial branching fractions are summed to determine $\mathcal{B}(B^0 \to 蟺^- e^+ 谓_e)$ = (1.43 $\pm$ 0.27(stat) $\pm$ 0.07(syst)) $\times 10^{-4}$ and $\mathcal{B}(B^+ \to 蟺^0 e^+ 谓_e)$ = (8.33 $\pm$ 1.67(stat) $\pm$ 0.55(syst)) $\times 10^{-5}$. We extract a first Belle II measurement of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{\mathrm{ub}}|$, with $|V_{\mathrm{ub}}|$ = (3.88 $\pm$ 0.45) $\times 10^{-3}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.08102v2-abstract-full').style.display = 'none'; document.getElementById('2206.08102v2-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 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">arXiv admin note: substantial text overlap with arXiv:2111.00710, arXiv:2008.08819</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.07453">arXiv:2206.07453</a> <span> [<a href="https://arxiv.org/pdf/2206.07453">pdf</a>, <a href="https://arxiv.org/format/2206.07453">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"> First decay-time-dependent analysis of $B^{0} \to K_{S}^{0} 蟺^{0}$ 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a> , et al. (569 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="2206.07453v1-abstract-short" style="display: inline;"> We report measurements of the branching fraction ($\mathcal{B}$) and direct $CP$-violating asymmetry ($A_{CP}$) of the charmless decay $B^{0} \to K^0 蟺^0$ at Belle II. A sample of $e^{+} e^{-}$ collisions, corresponding to $189.8 fb^{-1}$ of integrated luminosity, recorded at the $违(4S)$ resonance is used for the first decay-time-dependent analysis of these decays within the experiment. We reconst… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.07453v1-abstract-full').style.display = 'inline'; document.getElementById('2206.07453v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.07453v1-abstract-full" style="display: none;"> We report measurements of the branching fraction ($\mathcal{B}$) and direct $CP$-violating asymmetry ($A_{CP}$) of the charmless decay $B^{0} \to K^0 蟺^0$ at Belle II. A sample of $e^{+} e^{-}$ collisions, corresponding to $189.8 fb^{-1}$ of integrated luminosity, recorded at the $违(4S)$ resonance is used for the first decay-time-dependent analysis of these decays within the experiment. We reconstruct about 135 signal candidates, and measure $\mathcal{B}(B^{0} \to K^{0} 蟺^{0})= [11.0 \pm 1.2 (stat) \pm 1.0 (syst)] \times 10^{-6}$ and $A_{CP} (B^{0} \to K^{0} 蟺^{0})= -0.41_{-0.32}^{+0.30} (stat) \pm 0.09 (syst)$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.07453v1-abstract-full').style.display = 'none'; document.getElementById('2206.07453v1-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 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.05946">arXiv:2206.05946</a> <span> [<a href="https://arxiv.org/pdf/2206.05946">pdf</a>, <a href="https://arxiv.org/format/2206.05946">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 branching fraction for the decay $B \to K^{\ast}(892)\ell^+\ell^-$ 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a> , et al. (569 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="2206.05946v4-abstract-short" style="display: inline;"> We report a measurement of the branching fraction of $B \to K^{\ast}(892)\ell^+\ell^-$ decays, where $\ell^+\ell^- = 渭^+渭^-$ or $e^+e^-$, using electron-positron collisions recorded at an energy at or near the $违(4S)$ mass and corresponding to an integrated luminosity of $189$ fb$^{-1}$. The data was collected during 2019--2021 by the Belle II experiment at the SuperKEKB $e^{+}e^{-}$ asymmetric-en… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.05946v4-abstract-full').style.display = 'inline'; document.getElementById('2206.05946v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.05946v4-abstract-full" style="display: none;"> We report a measurement of the branching fraction of $B \to K^{\ast}(892)\ell^+\ell^-$ decays, where $\ell^+\ell^- = 渭^+渭^-$ or $e^+e^-$, using electron-positron collisions recorded at an energy at or near the $违(4S)$ mass and corresponding to an integrated luminosity of $189$ fb$^{-1}$. The data was collected during 2019--2021 by the Belle II experiment at the SuperKEKB $e^{+}e^{-}$ asymmetric-energy collider. We reconstruct $K^{\ast}(892)$ candidates in the $K^+蟺^-$, $K_{S}^{0}蟺^+$, and $K^+蟺^0$ final states. The signal yields with statistical uncertainties are $22\pm 6$, $18 \pm 6$, and $38 \pm 9$ for the decays $B \to K^{\ast}(892)渭^+渭^-$, $B \to K^{\ast}(892)e^+e^-$, and $B \to K^{\ast}(892)\ell^+\ell^-$, respectively. We measure the branching fractions of these decays for the entire range of the dilepton mass, excluding the very low mass region to suppress the $B \to K^{\ast}(892)纬(\to e^+e^-)$ background and regions compatible with decays of charmonium resonances, to be \begin{equation} {\cal B}(B \to K^{\ast}(892)渭^+渭^-) = (1.19 \pm 0.31 ^{+0.08}_{-0.07}) \times 10^{-6}, {\cal B}(B \to K^{\ast}(892)e^+e^-) = (1.42 \pm 0.48 \pm 0.09)\times 10^{-6}, {\cal B}(B \to K^{\ast}(892)\ell^+\ell^-) = (1.25 \pm 0.30 ^{+0.08}_{-0.07}) \times 10^{-6}, \end{equation} where the first and second uncertainties are statistical and systematic, respectively. These results, limited by sample size, are the first measurements of $B \to K^{\ast}(892)\ell^+\ell^-$ branching fractions from the Belle II experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.05946v4-abstract-full').style.display = 'none'; document.getElementById('2206.05946v4-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2022-009 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.08981">arXiv:2111.08981</a> <span> [<a href="https://arxiv.org/pdf/2111.08981">pdf</a>, <a href="https://arxiv.org/ps/2111.08981">ps</a>, <a href="https://arxiv.org/format/2111.08981">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/10.1103/PhysRevD.105.L011102">10.1103/PhysRevD.105.L011102 <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 $螢_c^0 \to 螞K_S^0$, $螢_c^0 \to 危^0 K_S^0$, and $螢_c^0 \to 危^+ K^-$ decays 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=Li%2C+Y">Y. Li</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=Jia%2C+S">S. Jia</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=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=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=Bahinipati%2C+S">S. Bahinipati</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=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. (191 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.08981v2-abstract-short" style="display: inline;"> Using the entire data sample of $980\mathrm{~fb}^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we present measurements of the branching fractions of the Cabibbo-favored decays $螢_c^0 \to 螞K_S^0$, $螢_c^0 \to 危^0 K_S^0$, and $螢_c^0 \to 危^+ K^-$. Taking the decay $螢_c^0 \to 螢^- \pip$ as the normalization mode, we measure the branching fraction ratio… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.08981v2-abstract-full').style.display = 'inline'; document.getElementById('2111.08981v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.08981v2-abstract-full" style="display: none;"> Using the entire data sample of $980\mathrm{~fb}^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we present measurements of the branching fractions of the Cabibbo-favored decays $螢_c^0 \to 螞K_S^0$, $螢_c^0 \to 危^0 K_S^0$, and $螢_c^0 \to 危^+ K^-$. Taking the decay $螢_c^0 \to 螢^- \pip$ as the normalization mode, we measure the branching fraction ratio ${\cal B}(螢_c^0 \to 螞K_S^0)/{\cal B}(螢_c^0 \to 螢^- 蟺^+) = 0.229\pm0.008\pm0.012$ with improved precision, and measure the branching fraction ratios ${\cal B}(螢_c^0 \to 危^0 K_S^0)/{\cal B}(螢_c^0 \to 螢^- 蟺^+) = 0.038\pm0.006\pm0.004$ and ${\cal B}(螢_c^0 \to 危^+ K^-)/{\cal B}(螢_c^0 \to 螢^- 蟺^+) = 0.123\pm0.007\pm0.010$ for the first time. Taking into account the branching fraction of the normalization mode, the absolute branching fractions are determined to be ${\cal B}(螢_c^0 \to 螞K_S^0) = (3.27\pm0.11\pm0.17\pm0.73) \times 10^{-3}$, ${\cal B}(螢_c^0 \to 危^0 K_S^0) = (0.54\pm 0.09\pm 0.06\pm 0.12) \times 10^{-3}$, and ${\cal B}(螢_c^0 \to 危^+ K^-) = (1.76\pm 0.10\pm0.14\pm 0.39) \times 10^{-3}$. The first and second uncertainties above are statistical and systematic, respectively, while the third ones arise from the uncertainty of the branching fraction of $螢_c^0 \to 螢^- 蟺^+$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.08981v2-abstract-full').style.display = 'none'; document.getElementById('2111.08981v2-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 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 4 figures, 3 tables; accepted for publication as a Letter in Physical Review D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2021-27; KEK Preprint 2021-32 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 105, L011102 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.00710">arXiv:2111.00710</a> <span> [<a href="https://arxiv.org/pdf/2111.00710">pdf</a>, <a href="https://arxiv.org/format/2111.00710">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"> Exclusive $B \to X_u \ell 谓_\ell$ Decays with Hadronic Full-event-interpretation Tagging in 62.8 fb$^{-1}$ of 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a> , et al. (543 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.00710v1-abstract-short" style="display: inline;"> We present a reconstruction in early data of the semileptonic decay $B^+ \to 蟺^0 \ell^+ 谓_\ell$, and first results of a reconstruction of the decays $B^+ \to 蟻^0 \ell^+ 谓_\ell$ and $B^0 \to 蟻^- \ell^+ 谓_\ell$ in a sample corresponding to 62.8 fb$^{-1}$ of Belle II data using hadronic $B$-tagging via the full-event-interpretation algorithm. We determine the total branching fractions via fits to the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.00710v1-abstract-full').style.display = 'inline'; document.getElementById('2111.00710v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.00710v1-abstract-full" style="display: none;"> We present a reconstruction in early data of the semileptonic decay $B^+ \to 蟺^0 \ell^+ 谓_\ell$, and first results of a reconstruction of the decays $B^+ \to 蟻^0 \ell^+ 谓_\ell$ and $B^0 \to 蟻^- \ell^+ 谓_\ell$ in a sample corresponding to 62.8 fb$^{-1}$ of Belle II data using hadronic $B$-tagging via the full-event-interpretation algorithm. We determine the total branching fractions via fits to the distribution of the square of the missing mass, and find $\mathcal{B}(B^+ \to 蟺^0 \ell^+ 谓_\ell)$ = (8.29 $\pm$ 1.99(stat) $\pm$ 0.46(syst)) $\times 10^{-5}$. We obtain $95\%$ CL upper limits on the branching fractions with $\mathcal{B}(B^0 \to 蟻^- \ell^+ 谓_\ell) < 3.37 \times 10^{-4}$ and $\mathcal{B}(B^+ \to 蟻^0 \ell^+ 谓_\ell) < 19.7 \times 10^{-5}$. We also obtain an updated branching fraction for the $B^0 \to 蟺^- \ell^+ 谓_\ell$ decay, $\mathcal{B}(B^0 \to 蟺^- \ell^+ 谓_\ell)$ = (1.47 $\pm$ 0.29(stat) $\pm$ 0.05(syst)) $\times 10^{-4}$, based on the sum of the partial branching fractions in three bins of the squared momentum transfer to the leptonic system. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.00710v1-abstract-full').style.display = 'none'; document.getElementById('2111.00710v1-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.08219">arXiv:2110.08219</a> <span> [<a href="https://arxiv.org/pdf/2110.08219">pdf</a>, <a href="https://arxiv.org/format/2110.08219">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"> Measurements of the branching fractions for $B \to K^{*}纬$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</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=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a> , et al. (543 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.08219v1-abstract-short" style="display: inline;"> This paper reports a study of $B \to K^{*}纬$ decays using $62.8\pm 0.6$ fb$^{-1}$ of data collected during 2019--2020 by the Belle II experiment at the SuperKEKB $e^{+}e^{-}$ asymmetric-energy collider, corresponding to $(68.2 \pm 0.8) \times 10^6$ $B\overline{B}$ events. We find $454 \pm 28$, $50 \pm 10$, $169 \pm 18$, and $160 \pm 17$ signal events in the decay modes… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.08219v1-abstract-full').style.display = 'inline'; document.getElementById('2110.08219v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.08219v1-abstract-full" style="display: none;"> This paper reports a study of $B \to K^{*}纬$ decays using $62.8\pm 0.6$ fb$^{-1}$ of data collected during 2019--2020 by the Belle II experiment at the SuperKEKB $e^{+}e^{-}$ asymmetric-energy collider, corresponding to $(68.2 \pm 0.8) \times 10^6$ $B\overline{B}$ events. We find $454 \pm 28$, $50 \pm 10$, $169 \pm 18$, and $160 \pm 17$ signal events in the decay modes $B^{0} \to K^{*0}[K^{+}蟺^{-}]纬$, $B^{0} \to K^{*0}[K^0_{\rm S}蟺^{0}]纬$, $B^{+} \to K^{*+}[K^{+}蟺^{0}]纬$, and $B^{+} \to K^{*+}[K^{+}蟺^{0}]纬$, respectively. The uncertainties quoted for the signal yield are statistical only. We report the branching fractions of these decays: $$\mathcal{B} [B^{0} \to K^{*0}[K^{+}蟺^{-}]纬] = (4.5 \pm 0.3 \pm 0.2) \times 10^{-5}, $$ $$\mathcal{B} [B^{0} \to K^{*0}[K^0_{\rm S}蟺^{0}]纬] = (4.4 \pm 0.9 \pm 0.6) \times 10^{-5},$$ $$\mathcal{B} [B^{+} \to K^{*+}[K^{+}蟺^{0}]纬] = (5.0 \pm 0.5 \pm 0.4)\times 10^{-5},\text{ and}$$ $$\mathcal{B} [B^{+} \to K^{*+}[K^0_{\rm S}蟺^{+}]纬] = (5.4 \pm 0.6 \pm 0.4) \times 10^{-5},$$ where the first uncertainty is statistical, and the second is systematic. The results are consistent with world-average values. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.08219v1-abstract-full').style.display = 'none'; document.getElementById('2110.08219v1-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 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-014 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.11456">arXiv:2109.11456</a> <span> [<a href="https://arxiv.org/pdf/2109.11456">pdf</a>, <a href="https://arxiv.org/format/2109.11456">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"> Angular analysis of $B^+ \to 蟻^+蟻^0$ decays reconstructed in 2019-2020 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (527 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.11456v2-abstract-short" style="display: inline;"> We report on the first Belle II measurement of the branching fraction ($\mathcal{B}$) and longitudinal polarization fraction ($f_L$) of $B^+\to 蟻^+蟻^0$ decays. We reconstruct $B^+\to 蟻^+(\to 蟺^+蟺^0(\to 纬纬))蟻^0(\to 蟺^+蟺^-)$ decays in a sample of SuperKEKB electron-positron collisions collected by the Belle II experiment in 2019 and 2020 at the $违$(4S) resonance and corresponding to $62.8$ fb… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.11456v2-abstract-full').style.display = 'inline'; document.getElementById('2109.11456v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.11456v2-abstract-full" style="display: none;"> We report on the first Belle II measurement of the branching fraction ($\mathcal{B}$) and longitudinal polarization fraction ($f_L$) of $B^+\to 蟻^+蟻^0$ decays. We reconstruct $B^+\to 蟻^+(\to 蟺^+蟺^0(\to 纬纬))蟻^0(\to 蟺^+蟺^-)$ decays in a sample of SuperKEKB electron-positron collisions collected by the Belle II experiment in 2019 and 2020 at the $违$(4S) resonance and corresponding to $62.8$ fb$^{-1}$ of integrated luminosity. We fit the distributions of the difference between expected and observed $B$ candidate energy, continuum-suppression variable, dipion masses, and angular distributions of the resulting samples, to determine a signal yield of $104\pm16$ events. The signal yields are corrected for efficiencies determined from simulation and control data samples to obtain $\mathcal{B}(B^+ \to 蟻^+蟻^0) = [20.6 \pm 3.2(\rm stat) \pm 4.0(\rm syst)]\times 10^{-6}$, and $f_L(B^+ \to 蟻^+蟻^0) = 0.936 ^{+0.049}_{-0.041}(\rm stat)\pm 0.021(\rm syst)$. This first Belle II $B^+ \to 蟻^+蟻^0$ angular analysis yields results compatible with previous determinations, and indicates Belle II performance superior to early Belle results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.11456v2-abstract-full').style.display = 'none'; document.getElementById('2109.11456v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-003 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.10807">arXiv:2109.10807</a> <span> [<a href="https://arxiv.org/pdf/2109.10807">pdf</a>, <a href="https://arxiv.org/format/2109.10807">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"> Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless $B$ decays reconstructed in 2019-2020 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (527 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.10807v2-abstract-short" style="display: inline;"> We report on measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A}_{\rm CP}$) of multibody charmless $B$ decays reconstructed by the Belle II experiment at the SuperKEKB electron-positron collider. We use a sample of collisions collected in 2019 and 2020 at the $违(4S)$ resonance and corresponding to $62.8$ fb$^{-1}$ of integrated luminosity. We use s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.10807v2-abstract-full').style.display = 'inline'; document.getElementById('2109.10807v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.10807v2-abstract-full" style="display: none;"> We report on measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A}_{\rm CP}$) of multibody charmless $B$ decays reconstructed by the Belle II experiment at the SuperKEKB electron-positron collider. We use a sample of collisions collected in 2019 and 2020 at the $违(4S)$ resonance and corresponding to $62.8$ fb$^{-1}$ of integrated luminosity. We use simulation to determine optimized event selections. The $螖E$ and $M_{\rm bc}$ distributions of the resulting samples are fit to determine signal yields of approximately 690, 840, and 380 decays for the channels $B^+ \to K^+K^-K^+$, $B^+ \to K^+蟺^-蟺^+$, and $B^0 \to K^+蟺^-蟺^0$, respectively. These yields are corrected for efficiencies determined from simulation and control data samples to obtain $\mathcal{B}(B^+ \to K^+K^-K^+) = [35.8 \pm 1.6(\rm stat) \pm 1.4 (\rm syst)]\times 10^{-6}$, $\mathcal{B}(B^+ \to K^+蟺^-蟺^+) = [67.0 \pm 3.3 (\rm stat)\pm 2.3 (\rm syst)]\times 10^{-6}$, $\mathcal{B}(B^0 \to K^+蟺^-蟺^0) = [38.1 \pm 3.5 (\rm stat)\pm 3.9 (\rm syst)]\times 10^{-6}$, $\mathcal{A}_{\rm CP}(B^+ \to K^+K^-K^+) = -0.103 \pm 0.042(\rm stat) \pm 0.020 (\rm syst)$, $\mathcal{A}_{\rm CP}(B^+ \to K^+蟺^-蟺^+) = -0.010 \pm 0.050 (\rm stat)\pm 0.021(\rm syst)$, and $\mathcal{A}_{\rm CP}(B^0 \to K^+蟺^-蟺^0) = 0.207 \pm 0.088 (\rm stat)\pm 0.011(\rm syst)$. Results are consistent with previous measurements and demonstrate detector performance comparable with the best Belle results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.10807v2-abstract-full').style.display = 'none'; document.getElementById('2109.10807v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-002 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.03497">arXiv:2108.03497</a> <span> [<a href="https://arxiv.org/pdf/2108.03497">pdf</a>, <a href="https://arxiv.org/ps/2108.03497">ps</a>, <a href="https://arxiv.org/format/2108.03497">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 $蠂_{bJ}(nP) \rightarrow 蠅违(1S)$ 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=Abdesselam%2C+A">A. Abdesselam</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=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=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Arinstein%2C+K">K. Arinstein</a>, <a href="/search/hep-ex?searchtype=author&query=Arita%2C+Y">Y. Arita</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=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=Aziz%2C+T">T. Aziz</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=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Ban%2C+Y">Y. Ban</a>, <a href="/search/hep-ex?searchtype=author&query=Barberio%2C+E">E. Barberio</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</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=Bele%C3%B1o%2C+C">C. Bele帽o</a>, <a href="/search/hep-ex?searchtype=author&query=Belous%2C+K">K. Belous</a> , et al. (448 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.03497v2-abstract-short" style="display: inline;"> We report results from a study of hadronic transitions of the $蠂_{bJ}(nP)$ states of bottomonium at Belle. The $P$-wave states are reconstructed in transitions to the $违(1S)$ with the emission of an $蠅$ meson. The transitions of the $n=2$ triplet states provide a unique laboratory in which to study nonrelativistic quantum chromodynamics, as the kinematic threshold for production of an $蠅$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.03497v2-abstract-full').style.display = 'inline'; document.getElementById('2108.03497v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.03497v2-abstract-full" style="display: none;"> We report results from a study of hadronic transitions of the $蠂_{bJ}(nP)$ states of bottomonium at Belle. The $P$-wave states are reconstructed in transitions to the $违(1S)$ with the emission of an $蠅$ meson. The transitions of the $n=2$ triplet states provide a unique laboratory in which to study nonrelativistic quantum chromodynamics, as the kinematic threshold for production of an $蠅$ and $违(1S)$ lies between the $J=0$ and $J=1$ states. A search for the $蠂_{bJ}(3P)$ states is also reported. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.03497v2-abstract-full').style.display = 'none'; document.getElementById('2108.03497v2-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE-CONF-2102 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.05615">arXiv:2107.05615</a> <span> [<a href="https://arxiv.org/pdf/2107.05615">pdf</a>, <a href="https://arxiv.org/ps/2107.05615">ps</a>, <a href="https://arxiv.org/format/2107.05615">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.104.052003">10.1103/PhysRevD.104.052003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Masses and Widths of the $危_c(2455)^+$ and $危_c(2520)^+$ Baryons </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=Yelton%2C+J">J. Yelton</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</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=AlSaid%2C+S">S. AlSaid</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=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=Bahinipati%2C+S">S. Bahinipati</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=Biswal%2C+J">J. Biswal</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Bracko%2C+M">M. Bracko</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. (183 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="2107.05615v2-abstract-short" style="display: inline;"> Using 980 ${\rm fb}^{-1}$ of data {collected} with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we report the measurements of the masses, and the first measurements of the instrinsic widths, of the $危_c(2455)^+$ and $危_c(2520)^+$ charmed baryons. We find $M(危_c(2455)^+)-M(螞_c^+) = 166.17\pm 0.05^{+0.16}_{-0.07}\ {\rm MeV}/c^2$,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.05615v2-abstract-full').style.display = 'inline'; document.getElementById('2107.05615v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.05615v2-abstract-full" style="display: none;"> Using 980 ${\rm fb}^{-1}$ of data {collected} with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we report the measurements of the masses, and the first measurements of the instrinsic widths, of the $危_c(2455)^+$ and $危_c(2520)^+$ charmed baryons. We find $M(危_c(2455)^+)-M(螞_c^+) = 166.17\pm 0.05^{+0.16}_{-0.07}\ {\rm MeV}/c^2$, $螕(危_c(2455)^+) = 2.3 \pm 0.3 \pm 0.3\ {\rm MeV/c^2}$, $M(危_c(2520)^+)-M(螞_c^+) = 230.9 \pm 0.5 ^{+0.5}_{-0.1}\ {\rm MeV}/c^2$, and $螕(危_c(2520)^+) = 17.2^{+2.3\ +3.1}_{-2.1\ -0.7}\ {\rm MeV}/c^2$, where the uncertainties are statistical and systematic, respectively. These measurements can be used to test models of the underlying quark structure of the $危_c$ states. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.05615v2-abstract-full').style.display = 'none'; document.getElementById('2107.05615v2-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 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2021-14, KEK Preprint 2021-11 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 104, 052003 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.02373">arXiv:2107.02373</a> <span> [<a href="https://arxiv.org/pdf/2107.02373">pdf</a>, <a href="https://arxiv.org/format/2107.02373">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 branching fraction for $B^{0} \rightarrow 蟺^{0} 蟺^{0}$ decays reconstructed in 2019-2020 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (529 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="2107.02373v3-abstract-short" style="display: inline;"> We report the first reconstruction of the $B^{0} \to 蟺^{0} 蟺^{0}$ decay mode at Belle II using samples of 2019 and 2020 data that correspond to 62.8 fb$^{-1}$ of integrated luminosity. We find $14.0^{+6.8}_{-5.6}$ signal decays, corresponding to a significance of 3.4 standard deviations and determine a branching ratio of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.02373v3-abstract-full').style.display = 'inline'; document.getElementById('2107.02373v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.02373v3-abstract-full" style="display: none;"> We report the first reconstruction of the $B^{0} \to 蟺^{0} 蟺^{0}$ decay mode at Belle II using samples of 2019 and 2020 data that correspond to 62.8 fb$^{-1}$ of integrated luminosity. We find $14.0^{+6.8}_{-5.6}$ signal decays, corresponding to a significance of 3.4 standard deviations and determine a branching ratio of $\mathcal{B}(B^{0} \rightarrow 蟺^{0} 蟺^{0}) = [0.98^{+0.48}_{-0.39} \pm 0.27] \times 10^{-6}$. The results agree with previous determinations and contribute important information to an early assessment of detector performance and Belle II's potential for future determinations of $伪/蠁_2$ using $B \rightarrow 蟺蟺$ modes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.02373v3-abstract-full').style.display = 'none'; document.getElementById('2107.02373v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 4 figures. Supporting material for Moriond 2021 conference</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.13547">arXiv:2106.13547</a> <span> [<a href="https://arxiv.org/pdf/2106.13547">pdf</a>, <a href="https://arxiv.org/format/2106.13547">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"> Rediscovery of $B^0\to J\mskip 1mu / 蠄\mskip 2mu K^0_{\scriptscriptstyle L}$ 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (523 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2106.13547v1-abstract-short" style="display: inline;"> We present preliminary results on the reconstruction of the $B^0\to J\mskip 1mu / 蠄\mskip 2mu K^0_{\scriptscriptstyle L}$ decay, where $J\mskip 1mu / 蠄\mskip 2mu\to渭^+渭^-$ or $e^+e^-$. Using a dataset corresponding to a luminosity of $62.8\pm0.6\mbox{fb}^{-1}$ collected by the Belle II experiment at the SuperKEKB asymmetric energy $e^+e^-$ collider, we measure a total of $267\pm21$ candidates with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.13547v1-abstract-full').style.display = 'inline'; document.getElementById('2106.13547v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.13547v1-abstract-full" style="display: none;"> We present preliminary results on the reconstruction of the $B^0\to J\mskip 1mu / 蠄\mskip 2mu K^0_{\scriptscriptstyle L}$ decay, where $J\mskip 1mu / 蠄\mskip 2mu\to渭^+渭^-$ or $e^+e^-$. Using a dataset corresponding to a luminosity of $62.8\pm0.6\mbox{fb}^{-1}$ collected by the Belle II experiment at the SuperKEKB asymmetric energy $e^+e^-$ collider, we measure a total of $267\pm21$ candidates with $J\mskip 1mu / 蠄\mskip 2mu\to渭^+渭^-$ and $226\pm20$ with with $J\mskip 1mu / 蠄\mskip 2mu\to e^+e^-$. The quoted errors are statistical only. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.13547v1-abstract-full').style.display = 'none'; document.getElementById('2106.13547v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-009 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.03766">arXiv:2106.03766</a> <span> [<a href="https://arxiv.org/pdf/2106.03766">pdf</a>, <a href="https://arxiv.org/format/2106.03766">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"> Measurements of branching fractions and direct CP asymmetries in $B^{0}\to K^{+} 蟺^{-}$, $B^+ \to K_{\rm S}^0蟺^+$ and $B^0 \to 蟺^+蟺^-$ using 2019 and 2020 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (527 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2106.03766v1-abstract-short" style="display: inline;"> We report updated measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A_{\rm CP}}$) for charmless $B$ decays at Belle II, which operates on or near the $违$(4S) resonance at the SuperKEKB asymmetric energy $e^{+}e^{-}$ collider. We use samples of 2019 and 2020 data corresponding to 62.8 fb$^{-1}$ of integrated luminosity. The samples are analysed using… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.03766v1-abstract-full').style.display = 'inline'; document.getElementById('2106.03766v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.03766v1-abstract-full" style="display: none;"> We report updated measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A_{\rm CP}}$) for charmless $B$ decays at Belle II, which operates on or near the $违$(4S) resonance at the SuperKEKB asymmetric energy $e^{+}e^{-}$ collider. We use samples of 2019 and 2020 data corresponding to 62.8 fb$^{-1}$ of integrated luminosity. The samples are analysed using two-dimensional fits in $螖E$ and $M_{\it bc}$ to determine signal yields of approximately 568, 103, and 115 decays for the channels $B^0 \to K^+蟺^-$, $B^+ \to K_{\rm S}^0蟺^+$, and $B^0 \to 蟺^+蟺^-$, respectively. Signal yields are corrected for efficiencies determined from simulation and control data samples to obtain branching fractions and CP-violating asymmetries for flavour-specific channels. The results are compatible with known determinations and contribute important information to an early assessment of Belle II detector performance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.03766v1-abstract-full').style.display = 'none'; document.getElementById('2106.03766v1-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 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 8 figures. Supporting material for Spring 2021 conferences</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.00482">arXiv:2106.00482</a> <span> [<a href="https://arxiv.org/pdf/2106.00482">pdf</a>, <a href="https://arxiv.org/format/2106.00482">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 mixing probability $蠂_d$ with a semileptonic double-tagging strategy and $34.6 {\rm fb}^{-1}$ of Belle II collision 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (528 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2106.00482v1-abstract-short" style="display: inline;"> We present the first measurement of the time-integrated mixing probability $蠂_d$ using Belle II data collected at a center-of-mass (CM) energy of 10.58 GeV, corresponding to the mass of the $违$(4S) resonance, with an integrated luminosity of $34.6 {\rm fb}^{-1}$ at the SuperKEKB $e^+ e^-$ collider. We reconstruct pairs of B mesons both of which decay to semileptonic final states. Using a novel met… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.00482v1-abstract-full').style.display = 'inline'; document.getElementById('2106.00482v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.00482v1-abstract-full" style="display: none;"> We present the first measurement of the time-integrated mixing probability $蠂_d$ using Belle II data collected at a center-of-mass (CM) energy of 10.58 GeV, corresponding to the mass of the $违$(4S) resonance, with an integrated luminosity of $34.6 {\rm fb}^{-1}$ at the SuperKEKB $e^+ e^-$ collider. We reconstruct pairs of B mesons both of which decay to semileptonic final states. Using a novel methodology, we measure $蠂_d = 0.187 \pm 0.010 \text{ (stat.)} \pm 0.019 \text{ (syst.)}$, which is compatible with existing indirect and direct determinations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.00482v1-abstract-full').style.display = 'none'; document.getElementById('2106.00482v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 10 figures, conference note Moriond 2021</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.04111">arXiv:2105.04111</a> <span> [<a href="https://arxiv.org/pdf/2105.04111">pdf</a>, <a href="https://arxiv.org/format/2105.04111">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"> Measurements of branching fractions and direct ${\it CP}$-violating asymmetries in $B^+ \to K^+ 蟺^0~\mbox{and}~蟺^+ 蟺^0$ decays using 2019 and 2020 Belle II data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</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> , et al. (527 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.04111v1-abstract-short" style="display: inline;"> We report measurements of branching fractions ($\mathcal B$) and direct ${\it CP}$-violating asymmetries ($\mathcal A_{\it CP}$) for the decays $B^+\to K^+蟺^0$ and $B^+ \to 蟺^+蟺^0$ reconstructed with the Belle II detector in a sample of asymmetric-energy electron-positron collisions at the $违(4S)$ resonance corresponding to 62.8 $\text{fb}^{-1}$ of integrated luminosity. The results are… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.04111v1-abstract-full').style.display = 'inline'; document.getElementById('2105.04111v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.04111v1-abstract-full" style="display: none;"> We report measurements of branching fractions ($\mathcal B$) and direct ${\it CP}$-violating asymmetries ($\mathcal A_{\it CP}$) for the decays $B^+\to K^+蟺^0$ and $B^+ \to 蟺^+蟺^0$ reconstructed with the Belle II detector in a sample of asymmetric-energy electron-positron collisions at the $违(4S)$ resonance corresponding to 62.8 $\text{fb}^{-1}$ of integrated luminosity. The results are $\mathcal{B}(B^+ \to K^+蟺^0) = [11.9 ^{+1.1}_{-1.0} (\rm stat)\pm 1.6(\rm syst)]\times 10^{-6}$, $\mathcal{B}(B^+ \to 蟺^+蟺^0) = [5.5 ^{+1.0}_{-0.9} (\rm stat)\pm 0.7(\rm syst)]\times 10^{-6}$, $\mathcal A_{\it CP}(B^+ \to K^+蟺^0) = -0.09 \pm 0.09 (\rm stat)\pm 0.03(\rm syst)$, and $\mathcal A_{\it CP}(B^+ \to 蟺^+蟺^0) = -0.04 \pm 0.17 (\rm stat)\pm 0.06(\rm syst)$. The results are consistent with previous measurements and show a detector performance comparable with early Belle performance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.04111v1-abstract-full').style.display = 'none'; document.getElementById('2105.04111v1-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 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 10 figures. Supporting material for Winter 2021 conferences</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-006 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.14871">arXiv:2104.14871</a> <span> [<a href="https://arxiv.org/pdf/2104.14871">pdf</a>, <a href="https://arxiv.org/format/2104.14871">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"> First search for direct $CP$-violating asymmetry in $B^0 \to K^0 蟺^0$ 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (529 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.14871v2-abstract-short" style="display: inline;"> We report on the first measurement of the direct $CP$-violating asymmetry ($\mathcal{A}$) in the charmless decay $B^0 \to K^0蟺^0$ at Belle II and an updated measurement of its branching fraction ($\mathcal{B}$). We use a sample of electron-positron collisions collected in 2019 and 2020 at the $违(4S)$ resonance and corresponding to $62.8$ $\text{fb}^{-1}$ of integrated luminosity. We reconstruct an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.14871v2-abstract-full').style.display = 'inline'; document.getElementById('2104.14871v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.14871v2-abstract-full" style="display: none;"> We report on the first measurement of the direct $CP$-violating asymmetry ($\mathcal{A}$) in the charmless decay $B^0 \to K^0蟺^0$ at Belle II and an updated measurement of its branching fraction ($\mathcal{B}$). We use a sample of electron-positron collisions collected in 2019 and 2020 at the $违(4S)$ resonance and corresponding to $62.8$ $\text{fb}^{-1}$ of integrated luminosity. We reconstruct and select about $50$ $B^0 \to K_S^0 蟺^0$ candidates, and we measure $\mathcal{A}_{K^0蟺^0} = -0.40_{-0.44}^{+0.46} (\text{stat}) \pm 0.04 (\text{syst})$ and $\mathcal{B}(B^0 \to K^0 蟺^0) = [8.5_{-1.6}^{+1.7} (\text{stat}) \pm 1.2 (\text{syst})] \times 10^{-6}$. This is the first measurement of $CP$ violation in $B^0 \to K^0蟺^0$ decays reported by Belle II. The results agree with previous determinations and show a detector performance comparable with the best Belle results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.14871v2-abstract-full').style.display = 'none'; document.getElementById('2104.14871v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 5 figures. Supporting material for Winter 2021 conferences</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.06224">arXiv:2104.06224</a> <span> [<a href="https://arxiv.org/pdf/2104.06224">pdf</a>, <a href="https://arxiv.org/format/2104.06224">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 branching fractions of $B\to畏' K$ decays using 2019/2020 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=Abudin%C3%A9n%2C+F">F. Abudin茅n</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (523 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.06224v3-abstract-short" style="display: inline;"> This note describes the rediscovery of $B\to畏' K$ decays in Belle II data, both in the charged and neutral final state: $B_0\to畏' K_S$ and $B^\pm\to畏' K^\pm$. The $畏'$ is searched for in two decay modes: $畏'\to畏蟺^+蟺^-$ with $畏\to纬纬$, and $畏'\to蟻纬$. The analysis uses data collected in 2019 and 2020 at the SuperKEKB asymmetric $e^+e^-$ collider, with an integrated luminosity of $62.8~fb^{-1}$, corre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.06224v3-abstract-full').style.display = 'inline'; document.getElementById('2104.06224v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.06224v3-abstract-full" style="display: none;"> This note describes the rediscovery of $B\to畏' K$ decays in Belle II data, both in the charged and neutral final state: $B_0\to畏' K_S$ and $B^\pm\to畏' K^\pm$. The $畏'$ is searched for in two decay modes: $畏'\to畏蟺^+蟺^-$ with $畏\to纬纬$, and $畏'\to蟻纬$. The analysis uses data collected in 2019 and 2020 at the SuperKEKB asymmetric $e^+e^-$ collider, with an integrated luminosity of $62.8~fb^{-1}$, corresponding to $68.2$ million of $B\bar{B}$ pairs produced. The signal yield is obtained via an unbinned maximum likelihood fit to signal sensitive variables, obtaining branching ratios: $$\mathcal{B}\left(B^\pm\to畏'K^\pm\right) = \left(63.4~^{+3.4}_{-3.3}\,(stat)\,\pm3.2\,(syst)\,\right) \times10^{-6} $$ $$\mathcal{B}\left(B_0\to畏'K_S\right) = \left(59.9~^{+5.8}_{-5.5}\,(stat)\,\pm2.9\,(syst)\,\right) \times10^{-6} $$ which are consistent with world average. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.06224v3-abstract-full').style.display = 'none'; document.getElementById('2104.06224v3-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-007 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.03628">arXiv:2104.03628</a> <span> [<a href="https://arxiv.org/pdf/2104.03628">pdf</a>, <a href="https://arxiv.org/ps/2104.03628">ps</a>, <a href="https://arxiv.org/format/2104.03628">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 $B\to D^{(*)}h$ decays using $62.8~\mathrm{fb}^{-1}$ of 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=Abudinen%2C+F">F. Abudinen</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adak%2C+R">R. Adak</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlburg%2C+P">P. Ahlburg</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=Ameli%2C+F">F. Ameli</a>, <a href="/search/hep-ex?searchtype=author&query=Andricek%2C+L">L. Andricek</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=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=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Baehr%2C+S">S. Baehr</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bakich%2C+A+M">A. M. Bakich</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a> , et al. (527 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.03628v1-abstract-short" style="display: inline;"> We report measurements related to hadronic $B$ decays to final states that contain charm mesons. The analyses are performed on a $62.8~\mathrm{fb}^{-1}$ data set collected by the Belle II experiment at a center-of-mass energy corresponding to the mass of the $违(4S)$ resonance. The measurements reported are for the decay modes $B^-\to D^0 h^-$, $B^{-}\to D^{*0}h^-$, $\bar{B}^{0}\to D^{+} h^{-}$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.03628v1-abstract-full').style.display = 'inline'; document.getElementById('2104.03628v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.03628v1-abstract-full" style="display: none;"> We report measurements related to hadronic $B$ decays to final states that contain charm mesons. The analyses are performed on a $62.8~\mathrm{fb}^{-1}$ data set collected by the Belle II experiment at a center-of-mass energy corresponding to the mass of the $违(4S)$ resonance. The measurements reported are for the decay modes $B^-\to D^0 h^-$, $B^{-}\to D^{*0}h^-$, $\bar{B}^{0}\to D^{+} h^{-}$ and $\bar{B}^{0}\to D^{*+} h^{-}$, where $h=蟺$ or $K$. These modes are either signal or control channels for measurements related to the unitarity triangle angle $纬$ in direct or time-dependent $CP$-violation measurements. The reported observables are the ratios between the $B\to D^{(*)}K$ and $B\to D^{(*)}蟺$ decay rates, which are found to be in agreement with previous measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.03628v1-abstract-full').style.display = 'none'; document.getElementById('2104.03628v1-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 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 5 figures, Moriond QCD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-CONF-PH-2021-008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.12226">arXiv:2102.12226</a> <span> [<a href="https://arxiv.org/pdf/2102.12226">pdf</a>, <a href="https://arxiv.org/ps/2102.12226">ps</a>, <a href="https://arxiv.org/format/2102.12226">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/10.1103/PhysRevD.103.072004">10.1103/PhysRevD.103.072004 <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 $螞_c^+ \to p 畏$ and $螞_c^+ \to p 蟺^0$ decays 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=Li%2C+S+X">S. X. 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=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=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=Behera%2C+P">P. Behera</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=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=Biswal%2C+J">J. Biswal</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Bracko%2C+M">M. Bracko</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=Campajola%2C+M">M. Campajola</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+L">L. Cao</a> , et al. (182 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2102.12226v2-abstract-short" style="display: inline;"> We report measurements of the branching fractions of singly Cabibbo-suppressed decays $螞_c^+ \to p 畏$ and $螞_c^+ \to p 蟺^0$ using the full Belle data sample corresponding to an integrated luminosity of 980.6 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. A clear $螞_c^+$ signal is seen in the invariant mass distribution of $p 畏$.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.12226v2-abstract-full').style.display = 'inline'; document.getElementById('2102.12226v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.12226v2-abstract-full" style="display: none;"> We report measurements of the branching fractions of singly Cabibbo-suppressed decays $螞_c^+ \to p 畏$ and $螞_c^+ \to p 蟺^0$ using the full Belle data sample corresponding to an integrated luminosity of 980.6 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. A clear $螞_c^+$ signal is seen in the invariant mass distribution of $p 畏$. The signal yield of the $螞_c^+ \to p 畏$ process is $7734 \pm 263$; from this, we measure the ratio of branching fractions ${\cal B}(螞_c^+ \to p 畏)/{\cal B}(螞_c^+ \to p K^- 蟺^+) = (2.258 \pm 0. 077(\rm stat. ) \pm 0.136(\rm syst. ))\times 10^{-2}$, from which we infer the branching fraction ${\cal B}(螞_c^+ \to p 畏) = (1.42 \pm 0.05(\rm stat.) \pm 0.11(\rm syst.)) \times 10^{-3}$. In addition, no significant signal for $螞_c^+ \to p 蟺^0$ is found so an upper limit on the branching fraction of ${\cal B}(螞_c^+ \to p 蟺^0)<8.0 \times 10^{-5}$ at 90\% credibility level is set, more than three times better than the best current upper limit. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.12226v2-abstract-full').style.display = 'none'; document.getElementById('2102.12226v2-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 7 figures, accepted for publication as a Regular Article in Physical Review D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle Preprint 2021-02; KEK Preprint 2020-42 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 072004 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.10114">arXiv:2101.10114</a> <span> [<a href="https://arxiv.org/pdf/2101.10114">pdf</a>, <a href="https://arxiv.org/format/2101.10114">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.103.114022">10.1103/PhysRevD.103.114022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Double-strangeness production in $螞p\to K^+X$ reaction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+J+K">Jung Keun Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Nam%2C+S">Seung-il Nam</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2101.10114v1-abstract-short" style="display: inline;"> We investigate $S=-2$ production from the $螞p\to K^+X$ reactions within the effective Lagrangian approach. The $螞p\to K^+螞螞$ and $螞p\to K^+螢^-p$ reactions are considered to find the lightest $S=-2$ system, which is $H$-dibaryon. We assume that the $H(2250)\to螞螞$, and $H(2270)\to螢^-p$ decays with the intrinsic decay width of 1 MeV. According to our calculations, the total cross-sections for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.10114v1-abstract-full').style.display = 'inline'; document.getElementById('2101.10114v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.10114v1-abstract-full" style="display: none;"> We investigate $S=-2$ production from the $螞p\to K^+X$ reactions within the effective Lagrangian approach. The $螞p\to K^+螞螞$ and $螞p\to K^+螢^-p$ reactions are considered to find the lightest $S=-2$ system, which is $H$-dibaryon. We assume that the $H(2250)\to螞螞$, and $H(2270)\to螢^-p$ decays with the intrinsic decay width of 1 MeV. According to our calculations, the total cross-sections for $螞p\to K^+螞螞$ and $螞p\to K^+螢^-p$ reactions were found to be of the order of a few $渭$b in the $螞$ beam momentum range of up to 5 GeV$/c$. Furthermore, the direct access of information regarding the interference patterns between the $H$-dibaryon and non-resonant contributions was demonstrated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.10114v1-abstract-full').style.display = 'none'; document.getElementById('2101.10114v1-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 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> PKNU-NuHaTh-2020-02 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 114022 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.07571">arXiv:2012.07571</a> <span> [<a href="https://arxiv.org/pdf/2012.07571">pdf</a>, <a href="https://arxiv.org/ps/2012.07571">ps</a>, <a href="https://arxiv.org/format/2012.07571">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.126.121801">10.1103/PhysRevLett.126.121801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of the $K_L \!\to\! 蟺^0 谓\overline谓$ Decay at the J-PARC KOTO Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=KOTO+Collaboration"> KOTO Collaboration</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=Beckford%2C+B">B. Beckford</a>, <a href="/search/hep-ex?searchtype=author&query=Campbell%2C+M">M. Campbell</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+S+H">S. H. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Comfort%2C+J">J. Comfort</a>, <a href="/search/hep-ex?searchtype=author&query=Dona%2C+K">K. Dona</a>, <a href="/search/hep-ex?searchtype=author&query=Farrington%2C+M+S">M. S. Farrington</a>, <a href="/search/hep-ex?searchtype=author&query=Hanai%2C+K">K. Hanai</a>, <a href="/search/hep-ex?searchtype=author&query=Hara%2C+N">N. Hara</a>, <a href="/search/hep-ex?searchtype=author&query=Haraguchi%2C+H">H. Haraguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Hsiung%2C+Y+B">Y. B. Hsiung</a>, <a href="/search/hep-ex?searchtype=author&query=Hutcheson%2C+M">M. Hutcheson</a>, <a href="/search/hep-ex?searchtype=author&query=Inagaki%2C+T">T. Inagaki</a>, <a href="/search/hep-ex?searchtype=author&query=Isoe%2C+M">M. Isoe</a>, <a href="/search/hep-ex?searchtype=author&query=Kamiji%2C+I">I. Kamiji</a>, <a href="/search/hep-ex?searchtype=author&query=Kato%2C+T">T. Kato</a>, <a href="/search/hep-ex?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/hep-ex?searchtype=author&query=Kim%2C+J+L">J. L. Kim</a>, <a href="/search/hep-ex?searchtype=author&query=Kim%2C+H+M">H. M. Kim</a>, <a href="/search/hep-ex?searchtype=author&query=Komatsubara%2C+T+K">T. K. Komatsubara</a>, <a href="/search/hep-ex?searchtype=author&query=Kotera%2C+K">K. Kotera</a>, <a href="/search/hep-ex?searchtype=author&query=Lee%2C+S+K">S. K. Lee</a>, <a href="/search/hep-ex?searchtype=author&query=Lee%2C+J+W">J. W. Lee</a>, <a href="/search/hep-ex?searchtype=author&query=Lim%2C+G+Y">G. Y. Lim</a> , et al. (46 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2012.07571v2-abstract-short" style="display: inline;"> The rare decay $K_L \!\to\! 蟺^0 谓\overline谓$ was studied with the dataset taken at the J-PARC KOTO experiment in 2016, 2017, and 2018. With a single event sensitivity of $( 7.20 \pm 0.05_{\rm stat} \pm 0.66_{\rm syst} ) \times 10^{-10}$, three candidate events were observed in the signal region. After unveiling them, contaminations from $K^{\pm}$ and scattered $K_L$ decays were studied, and the to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.07571v2-abstract-full').style.display = 'inline'; document.getElementById('2012.07571v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.07571v2-abstract-full" style="display: none;"> The rare decay $K_L \!\to\! 蟺^0 谓\overline谓$ was studied with the dataset taken at the J-PARC KOTO experiment in 2016, 2017, and 2018. With a single event sensitivity of $( 7.20 \pm 0.05_{\rm stat} \pm 0.66_{\rm syst} ) \times 10^{-10}$, three candidate events were observed in the signal region. After unveiling them, contaminations from $K^{\pm}$ and scattered $K_L$ decays were studied, and the total number of background events was estimated to be $1.22 \pm 0.26$. We conclude that the number of observed events is statistically consistent with the background expectation. For this dataset, we set an upper limit of $4.9 \times 10^{-9}$ on the branching fraction of $K_L \!\to\! 蟺^0 谓\overline谓$ at the 90% confidence level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.07571v2-abstract-full').style.display = 'none'; document.getElementById('2012.07571v2-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 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 5 figures; published version, no change in the results. Fig. 2 and Fig. 4 were revised. In Fig. 5, the plot of the $P_{t}$ versus ${Z_{\mathrm{vtx}}}$ of the beam-halo $K_L\!\to\!2纬$ background events was added as Fig. 5 (b)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 126, 121801 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.05607">arXiv:2012.05607</a> <span> [<a href="https://arxiv.org/pdf/2012.05607">pdf</a>, <a href="https://arxiv.org/format/2012.05607">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.103.112002">10.1103/PhysRevD.103.112002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Resonant and Non-Resonant Branching Ratios in $螢_{c}^{0} \rightarrow 螢^{0} K^+ K^-$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=McNeil%2C+J+T">J. T. McNeil</a>, <a href="/search/hep-ex?searchtype=author&query=Yelton%2C+J">J. Yelton</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J">J. Bennett</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=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=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=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=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P">P. Behera</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=Biswal%2C+J">J. Biswal</a>, <a href="/search/hep-ex?searchtype=author&query=Bobrov%2C+A">A. Bobrov</a>, <a href="/search/hep-ex?searchtype=author&query=Bonvicini%2C+G">G. Bonvicini</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Bracko%2C+M">M. Bracko</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=Campajola%2C+M">M. Campajola</a> , et al. (170 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2012.05607v2-abstract-short" style="display: inline;"> Using the entire data sample of $980$ $fb^{-1}$ integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider, we present an amplitude analysis measuring the branching fractions of the Cabibbo-allowed, $W$-exchange resonant decay $螢_{c}^{0} \rightarrow 螢^{0} 蠁(\to K^+ K^-)$ with a polarized $蠁$ and the non-resonant decay via a direct process… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.05607v2-abstract-full').style.display = 'inline'; document.getElementById('2012.05607v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.05607v2-abstract-full" style="display: none;"> Using the entire data sample of $980$ $fb^{-1}$ integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider, we present an amplitude analysis measuring the branching fractions of the Cabibbo-allowed, $W$-exchange resonant decay $螢_{c}^{0} \rightarrow 螢^{0} 蠁(\to K^+ K^-)$ with a polarized $蠁$ and the non-resonant decay via a direct process $螢_{c}^{0} \rightarrow 螢^{0} K^+ K^-$. We present these measurements, relative to the normalization mode $螢^{-}蟺^{+}$, and find branching ratios $\frac{\mathcal{B}(螢_{c}^{0} \rightarrow 螢^{0} 蠁(\rightarrow K^{+}K^{-}))}{\mathcal{B}(螢_{c}^{0} \rightarrow 螢^{-} 蟺^{+})} = 0.036 \pm 0.004 (stat.) \pm 0.002 (syst.)$ and $\frac{\mathcal{B}(螢_{c}^{0} \rightarrow 螢^{0} K^{+} K^{-})}{\mathcal{B}(螢_{c}^{0} \rightarrow 螢^{-} 蟺^{+})} = 0.039 \pm 0.004 (stat.) \pm 0.002 (syst.)$ which suggest that only minor cusping peaks occur in the combinatorial background of $惟^{*-} \to 螢^{0}K^{-}$ due to these $螢_{c}^{0}$ decays. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.05607v2-abstract-full').style.display = 'none'; document.getElementById('2012.05607v2-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 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 7 figures, 1 table, On behalf of the Belle Collaboration, Accepted by Phys. Rev. D (05/10/21) DZ12501</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 103, 112002 (2021) </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=Ahn%2C+J+K&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Ahn%2C+J+K&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Ahn%2C+J+K&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> <li> <a href="/search/?searchtype=author&query=Ahn%2C+J+K&start=100" class="pagination-link " aria-label="Page 3" aria-current="page">3 </a> </li> </ul> </nav> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> 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