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</a> </li> <li> <a href="/search/?searchtype=author&query=Nakamura%2C+K&start=200" class="pagination-link " aria-label="Page 5" aria-current="page">5 </a> </li> <li> <a href="/search/?searchtype=author&query=Nakamura%2C+K&start=250" class="pagination-link " aria-label="Page 6" aria-current="page">6 </a> </li> <li> <a href="/search/?searchtype=author&query=Nakamura%2C+K&start=300" class="pagination-link " aria-label="Page 7" aria-current="page">7 </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/2502.17002">arXiv:2502.17002</a> <span> [<a href="https://arxiv.org/pdf/2502.17002">pdf</a>, <a href="https://arxiv.org/format/2502.17002">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"> Neutron multiplicity measurement in muon capture on oxygen nuclei in the Gd-loaded Super-Kamiokande detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+T+S">The Super-Kamiokande Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+S">S. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Asaoka%2C+Y">Y. Asaoka</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Okamoto%2C+K">K. Okamoto</a> , et al. (265 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="2502.17002v1-abstract-short" style="display: inline;"> In recent neutrino detectors, neutrons produced in neutrino reactions play an important role. Muon capture on oxygen nuclei is one of the processes that produce neutrons in water Cherenkov detectors. We measured neutron multiplicity in the process using cosmic ray muons that stop in the gadolinium-loaded Super-Kamiokande detector. For this measurement, neutron detection efficiency is obtained with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.17002v1-abstract-full').style.display = 'inline'; document.getElementById('2502.17002v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.17002v1-abstract-full" style="display: none;"> In recent neutrino detectors, neutrons produced in neutrino reactions play an important role. Muon capture on oxygen nuclei is one of the processes that produce neutrons in water Cherenkov detectors. We measured neutron multiplicity in the process using cosmic ray muons that stop in the gadolinium-loaded Super-Kamiokande detector. For this measurement, neutron detection efficiency is obtained with the muon capture events followed by gamma rays to be $50.2^{+2.0}_{-2.1}\%$. By fitting the observed multiplicity considering the detection efficiency, we measure neutron multiplicity in muon capture as $P(0)=24\pm3\%$, $P(1)=70^{+3}_{-2}\%$, $P(2)=6.1\pm0.5\%$, $P(3)=0.38\pm0.09\%$. This is the first measurement of the multiplicity of neutrons associated with muon capture without neutron energy threshold. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.17002v1-abstract-full').style.display = 'none'; document.getElementById('2502.17002v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.08554">arXiv:2501.08554</a> <span> [<a href="https://arxiv.org/pdf/2501.08554">pdf</a>, <a href="https://arxiv.org/format/2501.08554">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> In-situ high voltage generation with Cockcroft-Walton multiplier for xenon gas time projection chamber </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Akiyama%2C+S">Shinichi Akiyama</a>, <a href="/search/hep-ex?searchtype=author&query=Hikida%2C+J">Junya Hikida</a>, <a href="/search/hep-ex?searchtype=author&query=Yoshida%2C+M">Masashi Yoshida</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">Kazuhiro Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Ban%2C+S">Sei Ban</a>, <a href="/search/hep-ex?searchtype=author&query=Hirose%2C+M">Masanori Hirose</a>, <a href="/search/hep-ex?searchtype=author&query=Ichikawa%2C+A+K">Atsuko K. Ichikawa</a>, <a href="/search/hep-ex?searchtype=author&query=Iwashita%2C+Y">Yoshihisa Iwashita</a>, <a href="/search/hep-ex?searchtype=author&query=Kikawa%2C+T">Tatsuya Kikawa</a>, <a href="/search/hep-ex?searchtype=author&query=Nakajima%2C+Y">Yasuhiro Nakajima</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K+D">Kiseki D. Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Nakaya%2C+T">Tsuyoshi Nakaya</a>, <a href="/search/hep-ex?searchtype=author&query=Obara%2C+S">Shuhei Obara</a>, <a href="/search/hep-ex?searchtype=author&query=Sakashita%2C+K">Ken Sakashita</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">Hiroyuki Sekiya</a>, <a href="/search/hep-ex?searchtype=author&query=Sugashima%2C+B">Bungo Sugashima</a>, <a href="/search/hep-ex?searchtype=author&query=Urano%2C+S">Soki Urano</a>, <a href="/search/hep-ex?searchtype=author&query=Hatsumi%2C+S">Sota Hatsumi</a>, <a href="/search/hep-ex?searchtype=author&query=Kobayashi%2C+S">Sota Kobayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Sasaki%2C+H">Hayato Sasaki</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="2501.08554v2-abstract-short" style="display: inline;"> We have newly developed a Cockcroft-Walton (CW) multiplier that can be used in a gas time projection chamber (TPC). TPC requires a high voltage to form an electric field that drifts ionization electrons. Supplying the high voltage from outside the pressure vessel requires a dedicated high-voltage feedthrough. An alternative approach is to generate the high voltage inside the pressure vessel with a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08554v2-abstract-full').style.display = 'inline'; document.getElementById('2501.08554v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.08554v2-abstract-full" style="display: none;"> We have newly developed a Cockcroft-Walton (CW) multiplier that can be used in a gas time projection chamber (TPC). TPC requires a high voltage to form an electric field that drifts ionization electrons. Supplying the high voltage from outside the pressure vessel requires a dedicated high-voltage feedthrough. An alternative approach is to generate the high voltage inside the pressure vessel with a relatively low voltage introduced from outside. CW multiplier can convert a low AC voltage input to a high DC voltage output, making it suitable for this purpose. We have integrated the CW multiplier into a high-pressure xenon gas TPC, called AXEL (A Xenon ElectroLuminescence detector), which have been developed to search for neutrinoless double beta decay of $^{136}$Xe. It detects ionization electrons by detecting electroluminescence with silicon photomultipliers, making it strong against electrical noises. An operation with the CW multiplier was successfully demonstrated; the TPC was operated for 77 days at 6.8 bar, and an energy resolution as high as (0.67 $\pm$ 0.08) % (FWHM) at 2615 keV was obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08554v2-abstract-full').style.display = 'none'; document.getElementById('2501.08554v2-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 14 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">23 pages, 21 figures, preprint for PTEP submission, typos corrected</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.16470">arXiv:2412.16470</a> <span> [<a href="https://arxiv.org/pdf/2412.16470">pdf</a>, <a href="https://arxiv.org/format/2412.16470">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 decay modes $B^0\to K_S^0蟿^\pm\ell^\mp~(\ell=渭, e)$ with hadronic $B$-tagging at Belle and Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=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=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Baghel%2C+N+K">N. K. Baghel</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a> , et al. (403 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="2412.16470v1-abstract-short" style="display: inline;"> We present the first search for the lepton flavor-violating decay modes $B^0 \rightarrow K_S^0 蟿^\pm \ell^\mp~(\ell=渭, e)$ using the 711 fb$^{-1}$ and 365 fb$^{-1}$ data samples recorded by the Belle and Belle II detectors, respectively. We use a hadronic $B$-tagging technique, and search for the signal decay in the system recoiling against the fully reconstructed $B$ meson. We find no evidence fo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.16470v1-abstract-full').style.display = 'inline'; document.getElementById('2412.16470v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.16470v1-abstract-full" style="display: none;"> We present the first search for the lepton flavor-violating decay modes $B^0 \rightarrow K_S^0 蟿^\pm \ell^\mp~(\ell=渭, e)$ using the 711 fb$^{-1}$ and 365 fb$^{-1}$ data samples recorded by the Belle and Belle II detectors, respectively. We use a hadronic $B$-tagging technique, and search for the signal decay in the system recoiling against the fully reconstructed $B$ meson. We find no evidence for $B^0 \rightarrow K_S^0 蟿^\pm \ell^\mp$ decays and set 90\% confidence level upper limits on the branching fractions in the range of $[0.8,\,3.6]\times10^{-5}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.16470v1-abstract-full').style.display = 'none'; document.getElementById('2412.16470v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-031, KEK Preprint 2024-33 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.19633">arXiv:2409.19633</a> <span> [<a href="https://arxiv.org/pdf/2409.19633">pdf</a>, <a href="https://arxiv.org/format/2409.19633">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 proton decay via $p\rightarrow{e^+畏}$ and $p\rightarrow{渭^+畏}$ with a 0.37 Mton-year exposure of Super-Kamiokande </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+S">Super-Kamiokande Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Taniuchi%2C+N">N. Taniuchi</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+S">S. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Asaoka%2C+Y">Y. Asaoka</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a> , et al. (267 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.19633v1-abstract-short" style="display: inline;"> A search for proton decay into $e^+/渭^+$ and a $畏$ meson has been performed using data from a 0.373 Mton$\cdot$year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear $畏$ interaction cross section, resulting in a factor of two reduction in uncertainties from this source and $\sim$10\% increase in signal efficien… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.19633v1-abstract-full').style.display = 'inline'; document.getElementById('2409.19633v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.19633v1-abstract-full" style="display: none;"> A search for proton decay into $e^+/渭^+$ and a $畏$ meson has been performed using data from a 0.373 Mton$\cdot$year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear $畏$ interaction cross section, resulting in a factor of two reduction in uncertainties from this source and $\sim$10\% increase in signal efficiency. No significant data excess was found above the expected number of atmospheric neutrino background events resulting in no indication of proton decay into either mode. Lower limits on the proton partial lifetime of $1.4\times\mathrm{10^{34}~years}$ for $p\rightarrow e^+畏$ and $7.3\times\mathrm{10^{33}~years}$ for $p\rightarrow 渭^+畏$ at the 90$\%$ C.L. were set. These limits are around 1.5 times longer than our previous study and are the most stringent to date. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.19633v1-abstract-full').style.display = 'none'; document.getElementById('2409.19633v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.11144">arXiv:2408.11144</a> <span> [<a href="https://arxiv.org/pdf/2408.11144">pdf</a>, <a href="https://arxiv.org/format/2408.11144">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Measurement of inclusive jet cross section and substructure in $p$$+$$p$ collisions at $\sqrt{s_{_{NN}}}=200$ GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=PHENIX+Collaboration"> PHENIX Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abdulameer%2C+N+J">N. J. Abdulameer</a>, <a href="/search/hep-ex?searchtype=author&query=Acharya%2C+U">U. Acharya</a>, <a href="/search/hep-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/hep-ex?searchtype=author&query=Ajitanand%2C+N+N">N. N. Ajitanand</a>, <a href="/search/hep-ex?searchtype=author&query=Akiba%2C+Y">Y. Akiba</a>, <a href="/search/hep-ex?searchtype=author&query=Akimoto%2C+R">R. Akimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Alexander%2C+J">J. Alexander</a>, <a href="/search/hep-ex?searchtype=author&query=Alfred%2C+M">M. Alfred</a>, <a href="/search/hep-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/hep-ex?searchtype=author&query=Antsupov%2C+S">S. Antsupov</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+K">K. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Apadula%2C+N">N. Apadula</a>, <a href="/search/hep-ex?searchtype=author&query=Asano%2C+H">H. Asano</a>, <a href="/search/hep-ex?searchtype=author&query=Atomssa%2C+E+T">E. T. Atomssa</a>, <a href="/search/hep-ex?searchtype=author&query=Awes%2C+T+C">T. C. Awes</a>, <a href="/search/hep-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/hep-ex?searchtype=author&query=Babintsev%2C+V">V. Babintsev</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Bandara%2C+N+S">N. S. Bandara</a>, <a href="/search/hep-ex?searchtype=author&query=Bannier%2C+B">B. Bannier</a>, <a href="/search/hep-ex?searchtype=author&query=Bannikov%2C+E">E. Bannikov</a>, <a href="/search/hep-ex?searchtype=author&query=Barish%2C+K+N">K. N. Barish</a>, <a href="/search/hep-ex?searchtype=author&query=Bathe%2C+S">S. Bathe</a> , et al. (422 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="2408.11144v1-abstract-short" style="display: inline;"> The jet cross-section and jet-substructure observables in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV were measured by the PHENIX Collaboration at the Relativistic Heavy Ion Collider (RHIC). Jets are reconstructed from charged-particle tracks and electromagnetic-calorimeter clusters using the anti-$k_{t}$ algorithm with a jet radius $R=0.3$ for jets with transverse momentum within $8.0<p_T<40.0$ Ge… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.11144v1-abstract-full').style.display = 'inline'; document.getElementById('2408.11144v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.11144v1-abstract-full" style="display: none;"> The jet cross-section and jet-substructure observables in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV were measured by the PHENIX Collaboration at the Relativistic Heavy Ion Collider (RHIC). Jets are reconstructed from charged-particle tracks and electromagnetic-calorimeter clusters using the anti-$k_{t}$ algorithm with a jet radius $R=0.3$ for jets with transverse momentum within $8.0<p_T<40.0$ GeV/$c$ and pseudorapidity $|畏|<0.15$. Measurements include the jet cross section, as well as distributions of SoftDrop-groomed momentum fraction ($z_g$), charged-particle transverse momentum with respect to jet axis ($j_T$), and radial distributions of charged particles within jets ($r$). Also meaureed was the distribution of $尉=-ln(z)$, where $z$ is the fraction of the jet momentum carried by the charged particle. The measurements are compared to theoretical next-to and next-to-next-to-leading-order calculatios, PYTHIA event generator, and to other existing experimental results. Indicated from these meaurements is a lower particle multiplicity in jets at RHIC energies when compared to models. Also noted are implications for future jet measurements with sPHENIX at RHIC as well as at the future Election-Ion Collider. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.11144v1-abstract-full').style.display = 'none'; document.getElementById('2408.11144v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">446 authors from 77 institutions, 11 pages, 8 figures. v1 is version submitted to Physical Review D. HEPdata tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.09928">arXiv:2407.09928</a> <span> [<a href="https://arxiv.org/pdf/2407.09928">pdf</a>, <a href="https://arxiv.org/format/2407.09928">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2025.170224">10.1016/j.nima.2025.170224 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Results for pixel and strip centimeter-scale AC-LGAD sensors with a 120 GeV proton beam </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Dutta%2C+I">Irene Dutta</a>, <a href="/search/hep-ex?searchtype=author&query=Madrid%2C+C">Christopher Madrid</a>, <a href="/search/hep-ex?searchtype=author&query=Heller%2C+R">Ryan Heller</a>, <a href="/search/hep-ex?searchtype=author&query=Nanda%2C+S">Shirsendu Nanda</a>, <a href="/search/hep-ex?searchtype=author&query=Shekar%2C+D">Danush Shekar</a>, <a href="/search/hep-ex?searchtype=author&query=Mart%C3%ADn%2C+C+S">Claudio San Mart铆n</a>, <a href="/search/hep-ex?searchtype=author&query=Barr%C3%ADa%2C+M">Mat铆as Barr铆a</a>, <a href="/search/hep-ex?searchtype=author&query=Apresyan%2C+A">Artur Apresyan</a>, <a href="/search/hep-ex?searchtype=author&query=Ye%2C+Z">Zhenyu Ye</a>, <a href="/search/hep-ex?searchtype=author&query=Brooks%2C+W+K">William K. Brooks</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+W">Wei Chen</a>, <a href="/search/hep-ex?searchtype=author&query=D%27Amen%2C+G">Gabriele D'Amen</a>, <a href="/search/hep-ex?searchtype=author&query=Giacomini%2C+G">Gabriele Giacomini</a>, <a href="/search/hep-ex?searchtype=author&query=Tricoli%2C+A">Alessandro Tricoli</a>, <a href="/search/hep-ex?searchtype=author&query=Hayrapetyan%2C+A">Aram Hayrapetyan</a>, <a href="/search/hep-ex?searchtype=author&query=Lee%2C+H">Hakseong Lee</a>, <a href="/search/hep-ex?searchtype=author&query=K%C3%B6seyan%2C+O+K">Ohannes Kamer K枚seyan</a>, <a href="/search/hep-ex?searchtype=author&query=Los%2C+S">Sergey Los</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">Koji Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Kita%2C+S">Sayuka Kita</a>, <a href="/search/hep-ex?searchtype=author&query=Imamura%2C+T">Tomoka Imamura</a>, <a href="/search/hep-ex?searchtype=author&query=Pe%C3%B1a%2C+C">Crist铆an Pe帽a</a>, <a href="/search/hep-ex?searchtype=author&query=Xie%2C+S">Si Xie</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="2407.09928v2-abstract-short" style="display: inline;"> We present the results of an extensive evaluation of strip and pixel AC-LGAD sensors tested with a 120 GeV proton beam, focusing on the influence of design parameters on the sensor temporal and spatial resolutions. Results show that reducing the thickness of pixel sensors significantly enhances their time resolution, with 20 $渭$m-thick sensors achieving around 20 ps. Uniform performance is attaina… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09928v2-abstract-full').style.display = 'inline'; document.getElementById('2407.09928v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.09928v2-abstract-full" style="display: none;"> We present the results of an extensive evaluation of strip and pixel AC-LGAD sensors tested with a 120 GeV proton beam, focusing on the influence of design parameters on the sensor temporal and spatial resolutions. Results show that reducing the thickness of pixel sensors significantly enhances their time resolution, with 20 $渭$m-thick sensors achieving around 20 ps. Uniform performance is attainable with optimized sheet resistance, making these sensors ideal for future timing detectors. Conversely, 20 $渭$m-thick strip sensors exhibit higher jitter than similar pixel sensors, negatively impacting time resolution, despite reduced Landau fluctuations with respect to the 50 $渭$m-thick versions. Additionally, it is observed that a low resistivity in strip sensors limits signal size and time resolution, whereas higher resistivity improves performance. This study highlights the importance of tuning the n$^{+}$ sheet resistance and suggests that further improvements should target specific applications like the Electron-Ion Collider or other future collider experiments. In addition, the detailed performance of four AC-LGADs sensor designs is reported as examples of possible candidates for specific detector applications. These advancements position AC-LGADs as promising candidates for future 4D tracking systems, pending the development of specialized readout electronics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09928v2-abstract-full').style.display = 'none'; document.getElementById('2407.09928v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-24-0355 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instrum. Methods Phys. Res. A (2025), 170224 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.09139">arXiv:2407.09139</a> <span> [<a href="https://arxiv.org/pdf/2407.09139">pdf</a>, <a href="https://arxiv.org/format/2407.09139">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Measurement of $CP$ asymmetries in $B^0 \to K^0_S 蟺^0 纬$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (414 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.09139v1-abstract-short" style="display: inline;"> We report measurements of time-dependent $CP$ asymmetries in $B^0 \to K^0_S 蟺^0 纬$ decays based on a data sample of $(388\pm6)\times10^6$ $B\bar{B}$ events collected at the $违(4S)$ resonance with the Belle II detector. The Belle II experiment operates at the SuperKEKB asymmetric-energy $e^+e^-$ collider. We measure decay-time distributions to determine $CP$-violating parameters $S$ and $C$. We det… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09139v1-abstract-full').style.display = 'inline'; document.getElementById('2407.09139v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.09139v1-abstract-full" style="display: none;"> We report measurements of time-dependent $CP$ asymmetries in $B^0 \to K^0_S 蟺^0 纬$ decays based on a data sample of $(388\pm6)\times10^6$ $B\bar{B}$ events collected at the $违(4S)$ resonance with the Belle II detector. The Belle II experiment operates at the SuperKEKB asymmetric-energy $e^+e^-$ collider. We measure decay-time distributions to determine $CP$-violating parameters $S$ and $C$. We determine these parameters for two ranges of $K^0_S 蟺^0$ invariant mass: $m(K^0_S 蟺^0)\in (0.8, 1.0)$ $GeV/c^2$, which is dominated by $B^0 \to K^{*0} (\to K^0_S 蟺^0) 纬$ decays, and a complementary region $m(K^0_S 蟺^0)\in (0.6, 0.8)\cup(1.0, 1.8)$ $GeV/c^2$. Our results have improved precision as compared to previous measurements and are consistent with theory predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09139v1-abstract-full').style.display = 'none'; document.getElementById('2407.09139v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-009, KEK Preprint 2024-1 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.08984">arXiv:2407.08984</a> <span> [<a href="https://arxiv.org/pdf/2407.08984">pdf</a>, <a href="https://arxiv.org/ps/2407.08984">ps</a>, <a href="https://arxiv.org/format/2407.08984">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Measurement of branching fractions, CP asymmetry, and isospin asymmetry for $\boldsymbol{B\rightarrow蟻纬}$ decays using Belle and Belle II data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (385 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.08984v1-abstract-short" style="display: inline;"> We present measurements of $B^{+}\rightarrow蟻^{+}纬$ and $B^{0}\rightarrow蟻^{0}纬$ decays using a combined data sample of $772 \times 10^6$ $B\overline{B}$ pairs collected by the Belle experiment and $387\times 10^6$ $B\overline{B}$ pairs collected by the Belle II experiment in $e^{+}e^{-}$ collisions at the $违(4S)$ resonance. After an optimized selection, a simultaneous fit to the Belle and Belle I… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.08984v1-abstract-full').style.display = 'inline'; document.getElementById('2407.08984v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.08984v1-abstract-full" style="display: none;"> We present measurements of $B^{+}\rightarrow蟻^{+}纬$ and $B^{0}\rightarrow蟻^{0}纬$ decays using a combined data sample of $772 \times 10^6$ $B\overline{B}$ pairs collected by the Belle experiment and $387\times 10^6$ $B\overline{B}$ pairs collected by the Belle II experiment in $e^{+}e^{-}$ collisions at the $违(4S)$ resonance. After an optimized selection, a simultaneous fit to the Belle and Belle II data sets yields $114\pm 12$ $B^{+}\rightarrow蟻^{+}纬$ and $99\pm 12$ $B^{0}\rightarrow蟻^{0}纬$ decays. The measured branching fractions are $(13.1^{+2.0 +1.3}_{-1.9 -1.2})\times 10^{-7}$ and $(7.5\pm 1.3^{+1.0}_{-0.8})\times 10^{-7}$ for $B^{+}\rightarrow蟻^{+}纬$ and $B^{0}\rightarrow蟻^{0}纬$ decays, respectively, where the first uncertainty is statistical and the second is systematic. We also measure the isospin asymmetry $A_{\rm I}(B\rightarrow蟻纬)=(10.9^{+11.2 +7.8}_{-11.7 -7.3})\%$ and the direct CP asymmetry $A_{CP}(B^{+}\rightarrow蟻^{+}纬)=(-8.2\pm 15.2^{+1.6}_{-1.2})\%$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.08984v1-abstract-full').style.display = 'none'; document.getElementById('2407.08984v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-019; KEK Preprint 2023-37; UCHEP-24-04 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.19421">arXiv:2406.19421</a> <span> [<a href="https://arxiv.org/pdf/2406.19421">pdf</a>, <a href="https://arxiv.org/format/2406.19421">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"> The Belle II Detector Upgrades Framework Conceptual Design Report </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Auguste%2C+D+P">D. P. Auguste</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babeluk%2C+M">M. Babeluk</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=Barbero%2C+M">M. Barbero</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Bergauer%2C+T">T. Bergauer</a>, <a href="/search/hep-ex?searchtype=author&query=Bernlochner.%2C+F+U">F. U. Bernlochner.</a>, <a href="/search/hep-ex?searchtype=author&query=Bertacchi%2C+V">V. Bertacchi</a>, <a href="/search/hep-ex?searchtype=author&query=Bertolone%2C+G">G. Bertolone</a>, <a href="/search/hep-ex?searchtype=author&query=Bespin%2C+C">C. Bespin</a>, <a href="/search/hep-ex?searchtype=author&query=Bessner%2C+M">M. Bessner</a>, <a href="/search/hep-ex?searchtype=author&query=Bettarini%2C+S">S. Bettarini</a>, <a href="/search/hep-ex?searchtype=author&query=Bevan%2C+A+J">A. J. Bevan</a>, <a href="/search/hep-ex?searchtype=author&query=Bhuyan%2C+B">B. Bhuyan</a>, <a href="/search/hep-ex?searchtype=author&query=Bona%2C+M">M. Bona</a>, <a href="/search/hep-ex?searchtype=author&query=Bonis%2C+J+F">J. F. Bonis</a>, <a href="/search/hep-ex?searchtype=author&query=Borah%2C+J">J. Borah</a>, <a href="/search/hep-ex?searchtype=author&query=Bosi%2C+F">F. Bosi</a>, <a href="/search/hep-ex?searchtype=author&query=Boudagga%2C+R">R. Boudagga</a> , et al. (186 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="2406.19421v2-abstract-short" style="display: inline;"> We describe the planned near-term and potential longer-term upgrades of the Belle II detector at the SuperKEKB electron-positron collider operating at the KEK laboratory in Tsukuba, Japan. These upgrades will allow increasingly sensitive searches for possible new physics beyond the Standard Model in flavor, tau, electroweak and dark sector physics that are both complementary to and competitive wit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.19421v2-abstract-full').style.display = 'inline'; document.getElementById('2406.19421v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.19421v2-abstract-full" style="display: none;"> We describe the planned near-term and potential longer-term upgrades of the Belle II detector at the SuperKEKB electron-positron collider operating at the KEK laboratory in Tsukuba, Japan. These upgrades will allow increasingly sensitive searches for possible new physics beyond the Standard Model in flavor, tau, electroweak and dark sector physics that are both complementary to and competitive with the LHC and other experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.19421v2-abstract-full').style.display = 'none'; document.getElementById('2406.19421v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 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">Editor: F. Forti 170 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KEK-REPORT-2024-1, BELLE2-REPORT-2024-042 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.11438">arXiv:2406.11438</a> <span> [<a href="https://arxiv.org/pdf/2406.11438">pdf</a>, <a href="https://arxiv.org/format/2406.11438">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 Majorana Neutrinos with the Complete KamLAND-Zen Dataset </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+S">S. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Araki%2C+T">T. Araki</a>, <a href="/search/hep-ex?searchtype=author&query=Chiba%2C+K">K. Chiba</a>, <a href="/search/hep-ex?searchtype=author&query=Eda%2C+T">T. Eda</a>, <a href="/search/hep-ex?searchtype=author&query=Eizuka%2C+M">M. Eizuka</a>, <a href="/search/hep-ex?searchtype=author&query=Funahashi%2C+Y">Y. Funahashi</a>, <a href="/search/hep-ex?searchtype=author&query=Furuto%2C+A">A. Furuto</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+A">A. Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+Y">Y. Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Goto%2C+S">S. Goto</a>, <a href="/search/hep-ex?searchtype=author&query=Hachiya%2C+T">T. Hachiya</a>, <a href="/search/hep-ex?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/hep-ex?searchtype=author&query=Ichimura%2C+K">K. Ichimura</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+S">S. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/hep-ex?searchtype=author&query=Ishidoshiro%2C+K">K. Ishidoshiro</a>, <a href="/search/hep-ex?searchtype=author&query=Kamei%2C+Y">Y. Kamei</a>, <a href="/search/hep-ex?searchtype=author&query=Kawada%2C+N">N. Kawada</a>, <a href="/search/hep-ex?searchtype=author&query=Kishimoto%2C+Y">Y. Kishimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/hep-ex?searchtype=author&query=Marthe%2C+A">A. Marthe</a>, <a href="/search/hep-ex?searchtype=author&query=Matsumoto%2C+Y">Y. Matsumoto</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsui%2C+T">T. Mitsui</a>, <a href="/search/hep-ex?searchtype=author&query=Miyake%2C+H">H. Miyake</a> , et al. (48 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="2406.11438v1-abstract-short" style="display: inline;"> We present a search for neutrinoless double-beta ($0谓尾尾$) decay of $^{136}$Xe using the full KamLAND-Zen 800 dataset with 745 kg of enriched xenon, corresponding to an exposure of $2.097$ ton yr of $^{136}$Xe. This updated search benefits from a more than twofold increase in exposure, recovery of photo-sensor gain, and reduced background from muon-induced spallation of xenon. Combining with the se… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.11438v1-abstract-full').style.display = 'inline'; document.getElementById('2406.11438v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.11438v1-abstract-full" style="display: none;"> We present a search for neutrinoless double-beta ($0谓尾尾$) decay of $^{136}$Xe using the full KamLAND-Zen 800 dataset with 745 kg of enriched xenon, corresponding to an exposure of $2.097$ ton yr of $^{136}$Xe. This updated search benefits from a more than twofold increase in exposure, recovery of photo-sensor gain, and reduced background from muon-induced spallation of xenon. Combining with the search in the previous KamLAND-Zen phase, we obtain a lower limit for the $0谓尾尾$ decay half-life of $T_{1/2}^{0谓} > 3.8 \times 10^{26}$ yr at 90% C.L., a factor of 1.7 improvement over the previous limit. The corresponding upper limits on the effective Majorana neutrino mass are in the range 28-122 meV using phenomenological nuclear matrix element calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.11438v1-abstract-full').style.display = 'none'; document.getElementById('2406.11438v1-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, 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">arXiv admin note: text overlap with arXiv:2203.02139</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.14625">arXiv:2405.14625</a> <span> [<a href="https://arxiv.org/pdf/2405.14625">pdf</a>, <a href="https://arxiv.org/format/2405.14625">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP08(2024)205">10.1007/JHEP08(2024)205 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Test of light-lepton universality in $蟿$ decays with the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (406 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.14625v2-abstract-short" style="display: inline;"> We present a measurement of the ratio $R_渭= \mathcal{B}(蟿^-\to 渭^-\bar谓_渭谓_蟿) / \mathcal{B}(蟿^-\to e^-\bar谓_e谓_蟿)$ of branching fractions $\mathcal{B}$ of the $蟿$ lepton decaying to muons or electrons using data collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider. The sample has an integrated luminosity of $362\!\pm\!2\,\text{fb}^{-1}$ at a centre-of-mass energy of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.14625v2-abstract-full').style.display = 'inline'; document.getElementById('2405.14625v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.14625v2-abstract-full" style="display: none;"> We present a measurement of the ratio $R_渭= \mathcal{B}(蟿^-\to 渭^-\bar谓_渭谓_蟿) / \mathcal{B}(蟿^-\to e^-\bar谓_e谓_蟿)$ of branching fractions $\mathcal{B}$ of the $蟿$ lepton decaying to muons or electrons using data collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider. The sample has an integrated luminosity of $362\!\pm\!2\,\text{fb}^{-1}$ at a centre-of-mass energy of $10.58\,\text{GeV}$. Using an optimised event selection, a binned maximum likelihood fit is performed using the momentum spectra of the electron and muon candidates. The result, $R_渭= 0.9675 \pm 0.0007 \pm 0.0036$, where the first uncertainty is statistical and the second is systematic, is the most precise to date. It provides a stringent test of the light-lepton universality, translating to a ratio of the couplings of the muon and electron to the $W$ boson in $蟿$ decays of $0.9974 \pm 0.0019$, in agreement with the standard model expectation of unity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.14625v2-abstract-full').style.display = 'none'; document.getElementById('2405.14625v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-002, KEK Preprint 2023-49 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of High Energy Physics 08 (2024) 205 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.12488">arXiv:2405.12488</a> <span> [<a href="https://arxiv.org/pdf/2405.12488">pdf</a>, <a href="https://arxiv.org/format/2405.12488">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 joint oscillation analysis of Super-Kamiokande atmospheric and T2K accelerator neutrino data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Super-Kamiokande"> Super-Kamiokande</a>, <a href="/search/hep-ex?searchtype=author&query=collaborations%2C+T">T2K collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+S">S. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Akhlaq%2C+N">N. Akhlaq</a>, <a href="/search/hep-ex?searchtype=author&query=Akutsu%2C+R">R. Akutsu</a>, <a href="/search/hep-ex?searchtype=author&query=Alarakia-Charles%2C+H">H. Alarakia-Charles</a>, <a href="/search/hep-ex?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/hep-ex?searchtype=author&query=Hakim%2C+Y+I+A">Y. I. Alj Hakim</a>, <a href="/search/hep-ex?searchtype=author&query=Monsalve%2C+S+A">S. Alonso Monsalve</a>, <a href="/search/hep-ex?searchtype=author&query=Amanai%2C+S">S. Amanai</a>, <a href="/search/hep-ex?searchtype=author&query=Andreopoulos%2C+C">C. Andreopoulos</a>, <a href="/search/hep-ex?searchtype=author&query=Anthony%2C+L+H+V">L. H. V. Anthony</a>, <a href="/search/hep-ex?searchtype=author&query=Antonova%2C+M">M. Antonova</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+S">S. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Apte%2C+K+A">K. A. Apte</a>, <a href="/search/hep-ex?searchtype=author&query=Arai%2C+T">T. Arai</a>, <a href="/search/hep-ex?searchtype=author&query=Arihara%2C+T">T. Arihara</a>, <a href="/search/hep-ex?searchtype=author&query=Arimoto%2C+S">S. Arimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Asada%2C+Y">Y. Asada</a>, <a href="/search/hep-ex?searchtype=author&query=Asaka%2C+R">R. Asaka</a>, <a href="/search/hep-ex?searchtype=author&query=Ashida%2C+Y">Y. Ashida</a>, <a href="/search/hep-ex?searchtype=author&query=Atkin%2C+E+T">E. T. Atkin</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+N">N. Babu</a> , et al. (524 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="2405.12488v2-abstract-short" style="display: inline;"> The Super-Kamiokande and T2K collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interaction model for events overlapping in neutrino energy and correlated detector systematic uncertainties between the two datasets, which are found to be compatible. Using 3244.4 days of atmospheric data and a beam exposure of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.12488v2-abstract-full').style.display = 'inline'; document.getElementById('2405.12488v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.12488v2-abstract-full" style="display: none;"> The Super-Kamiokande and T2K collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interaction model for events overlapping in neutrino energy and correlated detector systematic uncertainties between the two datasets, which are found to be compatible. Using 3244.4 days of atmospheric data and a beam exposure of $19.7(16.3) \times 10^{20}$ protons on target in (anti)neutrino mode, the analysis finds a 1.9$蟽$ exclusion of CP-conservation (defined as $J_{CP}=0$) and a preference for the normal mass ordering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.12488v2-abstract-full').style.display = 'none'; document.getElementById('2405.12488v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 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">12 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.07386">arXiv:2405.07386</a> <span> [<a href="https://arxiv.org/pdf/2405.07386">pdf</a>, <a href="https://arxiv.org/format/2405.07386">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP09(2024)062">10.1007/JHEP09(2024)062 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for lepton-flavor-violating $蟿^- \to 渭^-渭^+渭^-$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Althubiti%2C+N">N. Althubiti</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (407 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.07386v2-abstract-short" style="display: inline;"> We present the result of a search for the charged-lepton-flavor violating decay $蟿^- \to 渭^-渭^+渭^-$ using a $424fb^{-1}$ sample of data recorded by the Belle II experiment at the SuperKEKB $e^{-}e^{+}$ collider. The selection of $e^{-}e^{+}\to蟿^+蟿^-$ events is based on an inclusive reconstruction of the non-signal tau decay, and on a boosted decision tree to suppress background. We observe one sig… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.07386v2-abstract-full').style.display = 'inline'; document.getElementById('2405.07386v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.07386v2-abstract-full" style="display: none;"> We present the result of a search for the charged-lepton-flavor violating decay $蟿^- \to 渭^-渭^+渭^-$ using a $424fb^{-1}$ sample of data recorded by the Belle II experiment at the SuperKEKB $e^{-}e^{+}$ collider. The selection of $e^{-}e^{+}\to蟿^+蟿^-$ events is based on an inclusive reconstruction of the non-signal tau decay, and on a boosted decision tree to suppress background. We observe one signal candidate, which is compatible with the expectation from background processes. We set a $90\%$ confidence level upper limit of $1.9 \times 10^{-8}$ on the branching fraction of the \taumu decay, which is the most stringent bound to date. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.07386v2-abstract-full').style.display = 'none'; document.getElementById('2405.07386v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-012 KEK Preprint 2024-6 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. High Energ. Phys. 2024, 62 (2024). </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.12817">arXiv:2404.12817</a> <span> [<a href="https://arxiv.org/pdf/2404.12817">pdf</a>, <a href="https://arxiv.org/format/2404.12817">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Determination of the CKM angle $蠁_{3}$ from a combination of Belle and Belle II results </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (377 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.12817v2-abstract-short" style="display: inline;"> We report a determination of the CKM angle $蠁_{3}$, also known as $纬$, from a combination of measurements using samples of up to 711~fb$^{-1}$ from the Belle experiment and up to 362~fb$^{-1}$ from the Belle II experiment. We combine results from analyses of $B^+\to DK^+, B^+\to D蟺^+$, and $B^+ \to D^{*}K^+$ decays, where $D$ is an admixture of $D^0$ and $\overline{D}{}^{0}$ mesons, in a likelihoo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.12817v2-abstract-full').style.display = 'inline'; document.getElementById('2404.12817v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.12817v2-abstract-full" style="display: none;"> We report a determination of the CKM angle $蠁_{3}$, also known as $纬$, from a combination of measurements using samples of up to 711~fb$^{-1}$ from the Belle experiment and up to 362~fb$^{-1}$ from the Belle II experiment. We combine results from analyses of $B^+\to DK^+, B^+\to D蟺^+$, and $B^+ \to D^{*}K^+$ decays, where $D$ is an admixture of $D^0$ and $\overline{D}{}^{0}$ mesons, in a likelihood fit to obtain $蠁_{3} = (78.6^{+7.2}_{-7.3})^{\circ}$. We also briefly discuss the interpretation of this result. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.12817v2-abstract-full').style.display = 'none'; document.getElementById('2404.12817v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">31 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-015, KEK Preprint 2023-31 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.09920">arXiv:2404.09920</a> <span> [<a href="https://arxiv.org/pdf/2404.09920">pdf</a>, <a href="https://arxiv.org/format/2404.09920">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 Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.3847/1538-4357/ad5fee">10.3847/1538-4357/ad5fee <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Combined Pre-Supernova Alert System with Kamland and Super-Kamiokande </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=KamLAND"> KamLAND</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+S">Super-Kamiokande Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+S">Seisho Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Eizuka%2C+M">Minori Eizuka</a>, <a href="/search/hep-ex?searchtype=author&query=Futagi%2C+S">Sawako Futagi</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+A">Azusa Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+Y">Yoshihito Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Goto%2C+S">Shun Goto</a>, <a href="/search/hep-ex?searchtype=author&query=Hachiya%2C+T">Takahiko Hachiya</a>, <a href="/search/hep-ex?searchtype=author&query=Hata%2C+K">Kazumi Hata</a>, <a href="/search/hep-ex?searchtype=author&query=Ichimura%2C+K">Koichi Ichimura</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+S">Sei Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+H">Haruo Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Inoue%2C+K">Kunio Inoue</a>, <a href="/search/hep-ex?searchtype=author&query=Ishidoshiro%2C+K">Koji Ishidoshiro</a>, <a href="/search/hep-ex?searchtype=author&query=Kamei%2C+Y">Yuto Kamei</a>, <a href="/search/hep-ex?searchtype=author&query=Kawada%2C+N">Nanami Kawada</a>, <a href="/search/hep-ex?searchtype=author&query=Kishimoto%2C+Y">Yasuhiro Kishimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Koga%2C+M">Masayuki Koga</a>, <a href="/search/hep-ex?searchtype=author&query=Kurasawa%2C+M">Maho Kurasawa</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsui%2C+T">Tadao Mitsui</a>, <a href="/search/hep-ex?searchtype=author&query=Miyake%2C+H">Haruhiko Miyake</a>, <a href="/search/hep-ex?searchtype=author&query=Morita%2C+D">Daisuke Morita</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+T">Takeshi Nakahata</a> , et al. (290 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.09920v3-abstract-short" style="display: inline;"> Preceding a core-collapse supernova, various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potentially detectable by terrestrial neutrino experiments such as KamLAND and Super-Kamiokande via inverse beta decay interactions. Once these pre-supernova neutrinos are ob… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.09920v3-abstract-full').style.display = 'inline'; document.getElementById('2404.09920v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.09920v3-abstract-full" style="display: none;"> Preceding a core-collapse supernova, various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potentially detectable by terrestrial neutrino experiments such as KamLAND and Super-Kamiokande via inverse beta decay interactions. Once these pre-supernova neutrinos are observed, an early warning of the upcoming core-collapse supernova can be provided. In light of this, KamLAND and Super-Kamiokande, both located in the Kamioka mine in Japan, have been monitoring pre-supernova neutrinos since 2015 and 2021, respectively. Recently, we performed a joint study between KamLAND and Super-Kamiokande on pre-supernova neutrino detection. A pre-supernova alert system combining the KamLAND detector and the Super-Kamiokande detector was developed and put into operation, which can provide a supernova alert to the astrophysics community. Fully leveraging the complementary properties of these two detectors, the combined alert is expected to resolve a pre-supernova neutrino signal from a 15 M$_{\odot}$ star within 510 pc of the Earth, at a significance level corresponding to a false alarm rate of no more than 1 per century. For a Betelgeuse-like model with optimistic parameters, it can provide early warnings up to 12 hours in advance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.09920v3-abstract-full').style.display = 'none'; document.getElementById('2404.09920v3-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Resubmitted to ApJ. 22 pages, 16 figures, for more information about the combined pre-supernova alert system, see https://www.lowbg.org/presnalarm/</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.08725">arXiv:2404.08725</a> <span> [<a href="https://arxiv.org/pdf/2404.08725">pdf</a>, <a href="https://arxiv.org/format/2404.08725">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1093/ptep/ptae128">10.1093/ptep/ptae128 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Development of a data overflow protection system for Super-Kamiokande to maximize data from nearby supernovae </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Mori%2C+M">M. Mori</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakano%2C+Y">Y. Nakano</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Okamoto%2C+K">K. Okamoto</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">H. Sekiya</a>, <a href="/search/hep-ex?searchtype=author&query=Shiba%2C+H">H. Shiba</a>, <a href="/search/hep-ex?searchtype=author&query=Shimizu%2C+K">K. Shimizu</a> , et al. (230 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.08725v2-abstract-short" style="display: inline;"> Neutrinos from very nearby supernovae, such as Betelgeuse, are expected to generate more than ten million events over 10\,s in Super-Kamokande (SK). At such large event rates, the buffers of the SK analog-to-digital conversion board (QBEE) will overflow, causing random loss of data that is critical for understanding the dynamics of the supernova explosion mechanism. In order to solve this problem,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08725v2-abstract-full').style.display = 'inline'; document.getElementById('2404.08725v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.08725v2-abstract-full" style="display: none;"> Neutrinos from very nearby supernovae, such as Betelgeuse, are expected to generate more than ten million events over 10\,s in Super-Kamokande (SK). At such large event rates, the buffers of the SK analog-to-digital conversion board (QBEE) will overflow, causing random loss of data that is critical for understanding the dynamics of the supernova explosion mechanism. In order to solve this problem, two new DAQ modules were developed to aid in the observation of very nearby supernovae. The first of these, the SN module, is designed to save only the number of hit PMTs during a supernova burst and the second, the Veto module, prescales the high rate neutrino events to prevent the QBEE from overflowing based on information from the SN module. In the event of a very nearby supernova, these modules allow SK to reconstruct the time evolution of the neutrino event rate from beginning to end using both QBEE and SN module data. This paper presents the development and testing of these modules together with an analysis of supernova-like data generated with a flashing laser diode. We demonstrate that the Veto module successfully prevents DAQ overflows for Betelgeuse-like supernovae as well as the long-term stability of the new modules. During normal running the Veto module is found to issue DAQ vetos a few times per month resulting in a total dead time less than 1\,ms, and does not influence ordinary operations. Additionally, using simulation data we find that supernovae closer than 800~pc will trigger Veto module resulting in a prescaling of the observed neutrino data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08725v2-abstract-full').style.display = 'none'; document.getElementById('2404.08725v2-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 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">28 pages, 18 figures. Submitted to PTEP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.08133">arXiv:2404.08133</a> <span> [<a href="https://arxiv.org/pdf/2404.08133">pdf</a>, <a href="https://arxiv.org/format/2404.08133">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.133.101804">10.1103/PhysRevLett.133.101804 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for Rare $b \to d\ell^+\ell^-$ Transitions at Belle </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle"> Belle</a>, <a href="/search/hep-ex?searchtype=author&query=Collaborations%2C+B+I">Belle II Collaborations</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Said%2C+S+A">S. Al Said</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (371 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.08133v2-abstract-short" style="display: inline;"> We present the results of a search for the $b \to d\ell^+\ell^-$ flavor-changing neutral-current rare decays $B^{+, 0} \to (畏, 蠅, 蟺^{+,0}, 蟻^{+, 0}) e^+e^-$ and $B^{+, 0} \to (畏, 蠅, 蟺^{0}, 蟻^{+}) 渭^+渭^-$ using a $711$ fb$^{-1}$ data sample that contains $772 \times 10^{6}$ $B\overline{B}$ events. The data were collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08133v2-abstract-full').style.display = 'inline'; document.getElementById('2404.08133v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.08133v2-abstract-full" style="display: none;"> We present the results of a search for the $b \to d\ell^+\ell^-$ flavor-changing neutral-current rare decays $B^{+, 0} \to (畏, 蠅, 蟺^{+,0}, 蟻^{+, 0}) e^+e^-$ and $B^{+, 0} \to (畏, 蠅, 蟺^{0}, 蟻^{+}) 渭^+渭^-$ using a $711$ fb$^{-1}$ data sample that contains $772 \times 10^{6}$ $B\overline{B}$ events. The data were collected at the $违(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We find no evidence for signal and set upper limits on branching fractions at the $90\%$ confidence level in the range $(3.8 - 47) \times 10^{-8}$ depending on the decay channel. The obtained limits are the world's best results. This is the first search for the channels $B^{+, 0} \to (蠅, 蟻^{+,0}) e^+e^-$ and $B^{+, 0} \to (蠅, 蟻^{+})渭^+渭^-$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.08133v2-abstract-full').style.display = 'none'; document.getElementById('2404.08133v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 12 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-005, KEK Preprint 2023-52 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 133, 101804 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.04915">arXiv:2404.04915</a> <span> [<a href="https://arxiv.org/pdf/2404.04915">pdf</a>, <a href="https://arxiv.org/format/2404.04915">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div 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.110.112005">10.1103/PhysRevD.110.112005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the $e^+e^- \to 蟺^+蟺^-蟺^0$ cross section in the energy range 0.62-3.50 GeV at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a> , et al. (338 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.04915v2-abstract-short" style="display: inline;"> We report a measurement of the $e^+e^- \to 蟺^+蟺^-蟺^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. We use an $e^+e^-$ data sample corresponding to 191 $\text{fb}^{-1}$ of integrated luminosity, collected at a center-of-mass energy at or near the $违{(4S)}$ resonance with the Belle II detector at the SuperKEKB collider. Signal yields are extract… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04915v2-abstract-full').style.display = 'inline'; document.getElementById('2404.04915v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.04915v2-abstract-full" style="display: none;"> We report a measurement of the $e^+e^- \to 蟺^+蟺^-蟺^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. We use an $e^+e^-$ data sample corresponding to 191 $\text{fb}^{-1}$ of integrated luminosity, collected at a center-of-mass energy at or near the $违{(4S)}$ resonance with the Belle II detector at the SuperKEKB collider. Signal yields are extracted by fitting the two-photon mass distribution in $e^+e^- \to 蟺^+蟺^-蟺^0纬$ events, which involve a $蟺^0 \to 纬纬$ decay and an energetic photon radiated from the initial state. Signal efficiency corrections with an accuracy of 1.6% are obtained from several control data samples. The uncertainty on the cross section at the $蠅$ and $蠁$ resonances is dominated by the systematic uncertainty of 2.2%. The resulting cross sections in the 0.62-1.80 GeV energy range yield $ a_渭^{3蟺} = [48.91 \pm 0.23~(\mathrm{stat}) \pm 1.07~(\mathrm{syst})] \times 10^{-10} $ for the leading-order hadronic vacuum polarization contribution to the muon anomalous magnetic moment. This result differs by $2.5$ standard deviations from the most precise current determination. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04915v2-abstract-full').style.display = 'none'; document.getElementById('2404.04915v2-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 24 figures, submitted to PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KEK Preprint 2023-51, Belle II Preprint 2024-004 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 110 (2024) 112005 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.11736">arXiv:2403.11736</a> <span> [<a href="https://arxiv.org/pdf/2403.11736">pdf</a>, <a href="https://arxiv.org/format/2403.11736">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Development of a low-background micro pixel chamber for directional dark matter searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Namai%2C+R">Ryota Namai</a>, <a href="/search/hep-ex?searchtype=author&query=Higashino%2C+S">Satoshi Higashino</a>, <a href="/search/hep-ex?searchtype=author&query=Ishiura%2C+H">Hirohisa Ishiura</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+T">Tomonori Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Ofuji%2C+M">Mizuno Ofuji</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+A">Ayaka Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">Kiseki Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Ito%2C+H">Hiroshi Ito</a>, <a href="/search/hep-ex?searchtype=author&query=Ichimura%2C+K">Koichi Ichimura</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">Ko Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Kobayashi%2C+K">Kazuyoshi Kobayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Takada%2C+A">Atsushi Takada</a>, <a href="/search/hep-ex?searchtype=author&query=Kubota%2C+R">Ryo Kubota</a>, <a href="/search/hep-ex?searchtype=author&query=Miuchi%2C+K">Kentaro Miuchi</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="2403.11736v1-abstract-short" style="display: inline;"> Direct detection of weakly interacting massive particles (WIMPs) can provide strong evidence of their existence and the directional method would have an advantage over other methods to detect the clear signal of WIMPs. Time projection chambers with micro-patterned gaseous detectors (MPGDs) are one of the common devices used in directional WIMP searches. A micro pixel chamber ($渭$-PIC), one of the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.11736v1-abstract-full').style.display = 'inline'; document.getElementById('2403.11736v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.11736v1-abstract-full" style="display: none;"> Direct detection of weakly interacting massive particles (WIMPs) can provide strong evidence of their existence and the directional method would have an advantage over other methods to detect the clear signal of WIMPs. Time projection chambers with micro-patterned gaseous detectors (MPGDs) are one of the common devices used in directional WIMP searches. A micro pixel chamber ($渭$-PIC), one of the various types of MPGDs, with specially selected low background materials (LBG$渭$-PIC) was developed and its performance was studied. The radon emission of the LBG$渭$-PIC was less than 1/60 of that of the $渭$-PIC currently in use. Although a non-negligible gain non-homogeneity was seen for the LBG$渭$-PIC, it can be used for the directional WIMP search with the correction of the non-homogeneity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.11736v1-abstract-full').style.display = 'none'; document.getElementById('2403.11736v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 14 figures, submitted to NIM A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.08619">arXiv:2403.08619</a> <span> [<a href="https://arxiv.org/pdf/2403.08619">pdf</a>, <a href="https://arxiv.org/format/2403.08619">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 Astrophysical Phenomena">astro-ph.HE</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.110.082008">10.1103/PhysRevD.110.082008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Kitagawa%2C+H">H. Kitagawa</a>, <a href="/search/hep-ex?searchtype=author&query=Tada%2C+T">T. Tada</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakano%2C+Y">Y. Nakano</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Okamoto%2C+K">K. Okamoto</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">H. Sekiya</a> , et al. (231 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="2403.08619v2-abstract-short" style="display: inline;"> We present the results of the charge ratio ($R$) and polarization ($P^渭_{0}$) measurements using the decay electron events collected from 2008 September to 2022 June by the Super-Kamiokande detector. Because of its underground location and long operation, we performed high precision measurements by accumulating cosmic-ray muons. We measured the muon charge ratio to be $R=1.32 \pm 0.02$… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.08619v2-abstract-full').style.display = 'inline'; document.getElementById('2403.08619v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.08619v2-abstract-full" style="display: none;"> We present the results of the charge ratio ($R$) and polarization ($P^渭_{0}$) measurements using the decay electron events collected from 2008 September to 2022 June by the Super-Kamiokande detector. Because of its underground location and long operation, we performed high precision measurements by accumulating cosmic-ray muons. We measured the muon charge ratio to be $R=1.32 \pm 0.02$ $(\mathrm{stat.}{+}\mathrm{syst.})$ at $E_渭\cos 胃_{\mathrm{Zenith}}=0.7^{+0.3}_{-0.2}$ $\mathrm{TeV}$, where $E_渭$ is the muon energy and $胃_{\mathrm{Zenith}}$ is the zenith angle of incoming cosmic-ray muons. This result is consistent with the Honda flux model while this suggests a tension with the $蟺K$ model of $1.9蟽$. We also measured the muon polarization at the production location to be $P^渭_{0}=0.52 \pm 0.02$ $(\mathrm{stat.}{+}\mathrm{syst.})$ at the muon momentum of $0.9^{+0.6}_{-0.1}$ $\mathrm{TeV}/c$ at the surface of the mountain; this also suggests a tension with the Honda flux model of $1.5蟽$. This is the most precise measurement ever to experimentally determine the cosmic-ray muon polarization near $1~\mathrm{TeV}/c$. These measurement results are useful to improve the atmospheric neutrino simulations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.08619v2-abstract-full').style.display = 'none'; document.getElementById('2403.08619v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">29 pages, 45 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 110, 082008 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.02590">arXiv:2403.02590</a> <span> [<a href="https://arxiv.org/pdf/2403.02590">pdf</a>, <a href="https://arxiv.org/format/2403.02590">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Measurement of $CP$ asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays at Belle II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (428 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.02590v1-abstract-short" style="display: inline;"> We report a measurement of decay-time dependent charge-parity ($CP$) asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $387 \times 10^6 B\bar{B}$ pairs collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the $CP$-violating parameters $S$ and $C$ from a fit to the di… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02590v1-abstract-full').style.display = 'inline'; document.getElementById('2403.02590v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.02590v1-abstract-full" style="display: none;"> We report a measurement of decay-time dependent charge-parity ($CP$) asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $387 \times 10^6 B\bar{B}$ pairs collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the $CP$-violating parameters $S$ and $C$ from a fit to the distribution of the decay-time difference between the two $B$ mesons. The resulting confidence region is consistent with previous measurements in $B^0 \rightarrow K^0_S K^0_S K^0_S$ and $B^0 \rightarrow (c\bar{c})K^0$ decays, and with predictions based on the standard model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02590v1-abstract-full').style.display = 'none'; document.getElementById('2403.02590v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-008, KEK Preprint 2023-56 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.17260">arXiv:2402.17260</a> <span> [<a href="https://arxiv.org/pdf/2402.17260">pdf</a>, <a href="https://arxiv.org/format/2402.17260">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.110.012001">10.1103/PhysRevD.110.012001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New graph-neural-network flavor tagger for Belle II and measurement of $\sin2蠁_1$ in $B^0 \to J/蠄K^0_\text{S}$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becherer%2C+F">F. Becherer</a> , et al. (391 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2402.17260v2-abstract-short" style="display: inline;"> We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral $B$ mesons produced in $违(4S)$ decays. It improves previous algorithms by using the information from all charged final-state particles and the relations between them. We evaluate its performance using $B$ decays to flavor-specific hadronic final states reconstructed in a 362 $\text{fb}^{-1}$ sampl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.17260v2-abstract-full').style.display = 'inline'; document.getElementById('2402.17260v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.17260v2-abstract-full" style="display: none;"> We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral $B$ mesons produced in $违(4S)$ decays. It improves previous algorithms by using the information from all charged final-state particles and the relations between them. We evaluate its performance using $B$ decays to flavor-specific hadronic final states reconstructed in a 362 $\text{fb}^{-1}$ sample of electron-positron collisions collected at the $违(4S)$ resonance with the Belle II detector at the SuperKEKB collider. We achieve an effective tagging efficiency of $(37.40 \pm 0.43 \pm 0.36) \%$, where the first uncertainty is statistical and the second systematic, which is $18\%$ better than the previous Belle II algorithm. Demonstrating the algorithm, we use $B^{0}\to J/蠄K^0_\text{S}$ decays to measure the mixing-induced and direct $CP$ violation parameters, $S = (0.724 \pm 0.035 \pm 0.009)$ and $C = (-0.035 \pm 0.026 \pm 0.029)$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.17260v2-abstract-full').style.display = 'none'; document.getElementById('2402.17260v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2024-006, KEK Preprint 2023-53 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 110, 012001, 2024 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.08786">arXiv:2402.08786</a> <span> [<a href="https://arxiv.org/pdf/2402.08786">pdf</a>, <a href="https://arxiv.org/format/2402.08786">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Present status of PICOLON project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/hep-ex?searchtype=author&query=Chernyak%2C+D">D. Chernyak</a>, <a href="/search/hep-ex?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/hep-ex?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/hep-ex?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/hep-ex?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/hep-ex?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/hep-ex?searchtype=author&query=Ito%2C+H">H. Ito</a>, <a href="/search/hep-ex?searchtype=author&query=Kisimoto%2C+T">T. Kisimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/hep-ex?searchtype=author&query=Kotera%2C+K">K. Kotera</a>, <a href="/search/hep-ex?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/hep-ex?searchtype=author&query=Kurosawa%2C+S">S. Kurosawa</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">K. Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/hep-ex?searchtype=author&query=Sakaguchi%2C+A">A. Sakaguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Sakaue%2C+A">A. Sakaue</a>, <a href="/search/hep-ex?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/hep-ex?searchtype=author&query=Takaku%2C+Y">Y. Takaku</a>, <a href="/search/hep-ex?searchtype=author&query=Takemoto%2C+Y">Y. Takemoto</a>, <a href="/search/hep-ex?searchtype=author&query=Umehara%2C+S">S. Umehara</a>, <a href="/search/hep-ex?searchtype=author&query=Urano%2C+Y">Y. Urano</a>, <a href="/search/hep-ex?searchtype=author&query=Yamamoto%2C+Y">Y. Yamamoto</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2402.08786v1-abstract-short" style="display: inline;"> The existence of cosmic dark matter and neutrino properties are long-standing problems in cosmology and particle physics. These problems have been investigated by using radiation detectors. We will discuss the application of inorganic crystal scintillators to studies on dark matter and neutrino properties. A large volume and high-purity inorganic crystal is a promising detector for investigating d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.08786v1-abstract-full').style.display = 'inline'; document.getElementById('2402.08786v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.08786v1-abstract-full" style="display: none;"> The existence of cosmic dark matter and neutrino properties are long-standing problems in cosmology and particle physics. These problems have been investigated by using radiation detectors. We will discuss the application of inorganic crystal scintillators to studies on dark matter and neutrino properties. A large volume and high-purity inorganic crystal is a promising detector for investigating dark matter and neutrino. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.08786v1-abstract-full').style.display = 'none'; document.getElementById('2402.08786v1-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 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Proceedings of the 37th Workshop on Radiation Detectors and Their Uses, KEK Proceedings 2023-1, (2024), p43 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.08108">arXiv:2401.08108</a> <span> [<a href="https://arxiv.org/pdf/2401.08108">pdf</a>, <a href="https://arxiv.org/format/2401.08108">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Development of HPK Capacitive Coupled LGAD (AC-LGAD) detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Imamura%2C+T">Tomoka Imamura</a>, <a href="/search/hep-ex?searchtype=author&query=Kita%2C+S">Sayuka Kita</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">Koji Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Hara%2C+K">Kazuhiko Hara</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="2401.08108v1-abstract-short" style="display: inline;"> The detectors with $\mathcal{O}$(10) $渭$m spatial resolution and $\mathcal{O}$(10) ps timing resolution construct powerful particle trackers for future hadron or lepton collider experiments. LGAD: Low-Gain-Avalanche-Diode is a semiconductor detector technology to improve timing resolution. Capacitive Coupled LGAD (AC-LGAD) detectors have been developed with HPK in order to meet both spatial and ti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.08108v1-abstract-full').style.display = 'inline'; document.getElementById('2401.08108v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.08108v1-abstract-full" style="display: none;"> The detectors with $\mathcal{O}$(10) $渭$m spatial resolution and $\mathcal{O}$(10) ps timing resolution construct powerful particle trackers for future hadron or lepton collider experiments. LGAD: Low-Gain-Avalanche-Diode is a semiconductor detector technology to improve timing resolution. Capacitive Coupled LGAD (AC-LGAD) detectors have been developed with HPK in order to meet both spatial and timing resolution requirements. Prototype samples with finely segmented electrodes have been produced and tested with various sensor fabrication parameters: doping concentrations, active thickness and electrode coupling capacitance. Timing resolution and signal height were evaluated with beta-ray. As a result, 100 $渭$m pitch pixel detector has been successfully developed achieving a good signal to noise ratio and 30 ps timing resolution for beta-ray. The detectors have to meet radiation hardness requirements as well. Radiation hardness of LGAD detectors has to be improved to use the detectors as inner trackers for hadron colliders. One of the major mechanisms of radiation damage of LGAD detectors is acceptor removal: shallow dopants in the gain layer of LGAD detectors are reduced by radiation damage. Two novel ideas are tested on effectiveness of delaying the acceptor removal. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.08108v1-abstract-full').style.display = 'none'; document.getElementById('2401.08108v1-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 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures, Proceedings of Vertex2023</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.02840">arXiv:2401.02840</a> <span> [<a href="https://arxiv.org/pdf/2401.02840">pdf</a>, <a href="https://arxiv.org/format/2401.02840">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> A test of lepton flavor universality with a measurement of $R(D^{*})$ using hadronic $B$ tagging at the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Ayad%2C+R">R. Ayad</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a> , et al. (412 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.02840v1-abstract-short" style="display: inline;"> The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} 蟿^{-} \overline谓_蟿)$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overline谓_{\ell})$, where $\ell$ is an electron or muon, is measured using a Belle~II data sample with an integrated luminosity of $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. Data is collected at th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.02840v1-abstract-full').style.display = 'inline'; document.getElementById('2401.02840v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.02840v1-abstract-full" style="display: none;"> The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} 蟿^{-} \overline谓_蟿)$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overline谓_{\ell})$, where $\ell$ is an electron or muon, is measured using a Belle~II data sample with an integrated luminosity of $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. Data is collected at the $违(\mathrm{4S})$ resonance, and one $B$ meson in the $违(\mathrm{4S})\rightarrow B\overline{B}$ decay is fully reconstructed in hadronic decay modes. The accompanying signal $B$ meson is reconstructed as $\overline{B}\rightarrow D^{*} 蟿^{-}\overline谓_蟿$ using leptonic $蟿$ decays. The normalization decay, $\overline{B}\rightarrow D^{*} \ell^{-} \overline谓_{\ell}$, where $\ell$ is an electron or muon, produces the same observable final state particles. The ratio of branching fractions is extracted in a simultaneous fit to two signal-discriminating variables in both channels and yields $R(D^{*}) = 0.262~_{-0.039}^{+0.041}(\mathrm{stat})~_{-0.032}^{+0.035}(\mathrm{syst})$. This result is consistent with the current world average and with standard model predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.02840v1-abstract-full').style.display = 'none'; document.getElementById('2401.02840v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 17 figures, submitted to PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BELLE2-PUB-PH-2024-001 https://docs.belle2.org/record/4057/ ; Belle II Preprint 2024-001; KEK Preprint 2023-47 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.12907">arXiv:2312.12907</a> <span> [<a href="https://arxiv.org/pdf/2312.12907">pdf</a>, <a href="https://arxiv.org/ps/2312.12907">ps</a>, <a href="https://arxiv.org/format/2312.12907">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.109.092001">10.1103/PhysRevD.109.092001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Solar neutrino measurements using the full data period of Super-Kamiokande-IV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+S">Super-Kamiokande Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Imaizumi%2C+S">S. Imaizumi</a>, <a href="/search/hep-ex?searchtype=author&query=Iyogi%2C+K">K. Iyogi</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Kato%2C+Y">Y. Kato</a>, <a href="/search/hep-ex?searchtype=author&query=Kishimoto%2C+Y">Y. Kishimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Mochizuki%2C+T">T. Mochizuki</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nagao%2C+Y">Y. Nagao</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a> , et al. (305 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2312.12907v2-abstract-short" style="display: inline;"> An analysis of solar neutrino data from the fourth phase of Super-Kamiokande~(SK-IV) from October 2008 to May 2018 is performed and the results are presented. The observation time of the data set of SK-IV corresponds to $2970$~days and the total live time for all four phases is $5805$~days. For more precise solar neutrino measurements, several improvements are applied in this analysis: lowering th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.12907v2-abstract-full').style.display = 'inline'; document.getElementById('2312.12907v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.12907v2-abstract-full" style="display: none;"> An analysis of solar neutrino data from the fourth phase of Super-Kamiokande~(SK-IV) from October 2008 to May 2018 is performed and the results are presented. The observation time of the data set of SK-IV corresponds to $2970$~days and the total live time for all four phases is $5805$~days. For more precise solar neutrino measurements, several improvements are applied in this analysis: lowering the data acquisition threshold in May 2015, further reduction of the spallation background using neutron clustering events, precise energy reconstruction considering the time variation of the PMT gain. The observed number of solar neutrino events in $3.49$--$19.49$ MeV electron kinetic energy region during SK-IV is $65,443^{+390}_{-388}\,(\mathrm{stat.})\pm 925\,(\mathrm{syst.})$ events. Corresponding $\mathrm{^{8}B}$ solar neutrino flux is $(2.314 \pm 0.014\, \rm{(stat.)} \pm 0.040 \, \rm{(syst.)}) \times 10^{6}~\mathrm{cm^{-2}\,s^{-1}}$, assuming a pure electron-neutrino flavor component without neutrino oscillations. The flux combined with all SK phases up to SK-IV is $(2.336 \pm 0.011\, \rm{(stat.)} \pm 0.043 \, \rm{(syst.)}) \times 10^{6}~\mathrm{cm^{-2}\,s^{-1}}$. Based on the neutrino oscillation analysis from all solar experiments, including the SK $5805$~days data set, the best-fit neutrino oscillation parameters are $\rm{sin^{2} 胃_{12,\,solar}} = 0.306 \pm 0.013 $ and $螖m^{2}_{21,\,\mathrm{solar}} = (6.10^{+ 0.95}_{-0.81}) \times 10^{-5}~\rm{eV}^{2}$, with a deviation of about 1.5$蟽$ from the $螖m^{2}_{21}$ parameter obtained by KamLAND. The best-fit neutrino oscillation parameters obtained from all solar experiments and KamLAND are $\sin^{2} 胃_{12,\,\mathrm{global}} = 0.307 \pm 0.012 $ and $螖m^{2}_{21,\,\mathrm{global}} = (7.50^{+ 0.19}_{-0.18}) \times 10^{-5}~\rm{eV}^{2}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.12907v2-abstract-full').style.display = 'none'; document.getElementById('2312.12907v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">47 pages, 61 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 109, 092001 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.06501">arXiv:2312.06501</a> <span> [<a href="https://arxiv.org/pdf/2312.06501">pdf</a>, <a href="https://arxiv.org/format/2312.06501">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/10.1088/1748-0221/19/02/C02038">10.1088/1748-0221/19/02/C02038 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Silicon Vertex Detector of the Belle II Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Mondal%2C+S">S. Mondal</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Aziz%2C+T">T. Aziz</a>, <a href="/search/hep-ex?searchtype=author&query=Bacher%2C+S">S. Bacher</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Batignani%2C+G">G. Batignani</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Behera%2C+P+K">P. K. Behera</a>, <a href="/search/hep-ex?searchtype=author&query=Bettarini%2C+S">S. Bettarini</a>, <a href="/search/hep-ex?searchtype=author&query=Bilka%2C+T">T. Bilka</a>, <a href="/search/hep-ex?searchtype=author&query=Bozek%2C+A">A. Bozek</a>, <a href="/search/hep-ex?searchtype=author&query=Buchsteiner%2C+F">F. Buchsteiner</a>, <a href="/search/hep-ex?searchtype=author&query=Casarosa%2C+G">G. Casarosa</a>, <a href="/search/hep-ex?searchtype=author&query=Corona%2C+L">L. Corona</a>, <a href="/search/hep-ex?searchtype=author&query=Das%2C+S+B">S. B. Das</a>, <a href="/search/hep-ex?searchtype=author&query=Dujany%2C+G">G. Dujany</a>, <a href="/search/hep-ex?searchtype=author&query=Finck%2C+C">C. Finck</a>, <a href="/search/hep-ex?searchtype=author&query=Forti%2C+F">F. Forti</a>, <a href="/search/hep-ex?searchtype=author&query=Friedl%2C+M">M. Friedl</a>, <a href="/search/hep-ex?searchtype=author&query=Gabrielli%2C+A">A. Gabrielli</a>, <a href="/search/hep-ex?searchtype=author&query=Gobbo%2C+B">B. Gobbo</a>, <a href="/search/hep-ex?searchtype=author&query=Halder%2C+S">S. Halder</a>, <a href="/search/hep-ex?searchtype=author&query=Hara%2C+K">K. Hara</a> , et al. (50 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2312.06501v3-abstract-short" style="display: inline;"> The silicon vertex detector (SVD) is installed at the heart of the Belle II experiment, taking data at the high-luminosity $B$-Factory SuperKEKB since 2019. The detector has shown a stable and above-99\% hit efficiency, with a large signal-to-noise in all sensors since the beginning of data taking. Cluster position and time resolution have been measured with 2020 and 2022 data and show excellent p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.06501v3-abstract-full').style.display = 'inline'; document.getElementById('2312.06501v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.06501v3-abstract-full" style="display: none;"> The silicon vertex detector (SVD) is installed at the heart of the Belle II experiment, taking data at the high-luminosity $B$-Factory SuperKEKB since 2019. The detector has shown a stable and above-99\% hit efficiency, with a large signal-to-noise in all sensors since the beginning of data taking. Cluster position and time resolution have been measured with 2020 and 2022 data and show excellent performance and stability. The effect of radiation damage is visible, but not affecting the performance. As the luminosity increases, higher machine backgrounds are expected and the excellent hit-time information in SVD can be exploited for background rejection. In particular, we have recently developed a novel procedure to select hits by grouping them event-by-event based on their time. This new procedure allows a significant reduction of the fake rate, while preserving the tracking efficiency, and it has therefore replaced the previous cut-based procedure. We have developed a method that uses the SVD hits to estimate the track time (previously unavailable) and the collision time. It has a similar precision to the estimate based on the drift chamber but its execution time is three orders of magnitude smaller, allowing a faster online reconstruction that is crucial in a high luminosity regime. The track time is a powerful information provided to analysis that allows, together with the above-mention grouping selection, to raise the occupancy limit above that expected at nominal luminosity, leaving room for a safety factor. Finally, in June 2022 the data taking of the Belle II experiment was stopped to install a new two-layer DEPFET detector (PXD) and upgrade components of the accelerator. The whole silicon tracker (PXD+SVD) has been extracted from Belle II, the new PXD installed, the detector closed and commissioned. We briefly describe the SVD results of this upgrade. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.06501v3-abstract-full').style.display = 'none'; document.getElementById('2312.06501v3-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16$^{\text{th}}$ Topical Seminar on Innovative Particle and Radiation Detectors (IPRD23) 25--29 September 2023 Siena, Italy</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 19 C02038 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.14647">arXiv:2311.14647</a> <span> [<a href="https://arxiv.org/pdf/2311.14647">pdf</a>, <a href="https://arxiv.org/format/2311.14647">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.109.112006">10.1103/PhysRevD.109.112006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evidence for $B^{+}\to K^{+}谓\bar谓$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (430 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.14647v3-abstract-short" style="display: inline;"> We search for the rare decay $B^{+}\rightarrow K^{+}谓\bar谓$ in a $362\ \rm{fb}^{-1}$ sample of electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying $B$ meson in $违(4S) \to B\kern 0.18em\overline{\kern -0.18em B}{}$ events to suppress background from other decays of the signal $B$ ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.14647v3-abstract-full').style.display = 'inline'; document.getElementById('2311.14647v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.14647v3-abstract-full" style="display: none;"> We search for the rare decay $B^{+}\rightarrow K^{+}谓\bar谓$ in a $362\ \rm{fb}^{-1}$ sample of electron-positron collisions at the $违(4S)$ resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying $B$ meson in $违(4S) \to B\kern 0.18em\overline{\kern -0.18em B}{}$ events to suppress background from other decays of the signal $B$ candidate and light-quark pair production. We validate the measurement with an auxiliary analysis based on a conventional hadronic reconstruction of the accompanying $B$ meson. For background suppression, we exploit distinct signal features using machine learning methods tuned with simulated data. The signal-reconstruction efficiency and background suppression are validated through various control channels. The branching fraction is extracted in a maximum likelihood fit. Our inclusive and hadronic analyses yield consistent results for the $B^{+}\rightarrow K^{+}谓\bar谓$ branching fraction of $\left[2.7\pm 0.5(\mathrm{stat})\pm 0.5(\mathrm{syst})\right] \times 10^{-5}$ and $\left[1.1^{+0.9}_{-0.8}(\mathrm{stat}){}^{+0.8}_{-0.5}(\mathrm{syst})\right] \times 10^{-5}$, respectively. Combining the results, we determine the branching fraction of the decay $B^{+}\rightarrow K^{+}谓\bar谓$ to be $\left[2.3 \pm 0.5(\mathrm{stat})^{+0.5}_{-0.4}(\mathrm{syst})\right]\times 10^{-5}$, providing the first evidence for this decay at $3.5$ standard deviations. The combined result is $2.7$ standard deviations above the standard model expectation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.14647v3-abstract-full').style.display = 'none'; document.getElementById('2311.14647v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">29 pages, 23 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-017, KEK Preprint 2023-35 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 109, 112006 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.09676">arXiv:2311.09676</a> <span> [<a href="https://arxiv.org/pdf/2311.09676">pdf</a>, <a href="https://arxiv.org/format/2311.09676">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 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.2024.138846">10.1016/j.physletb.2024.138846 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for Charged Excited States of Dark Matter with KamLAND-Zen </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=collaboration%2C+K">KamLAND-Zen collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+S">S. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Eizuka%2C+M">M. Eizuka</a>, <a href="/search/hep-ex?searchtype=author&query=Futagi%2C+S">S. Futagi</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+A">A. Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+Y">Y. Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Goto%2C+S">S. Goto</a>, <a href="/search/hep-ex?searchtype=author&query=Hachiya%2C+T">T. Hachiya</a>, <a href="/search/hep-ex?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ichimura%2C+K">K. Ichimura</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+S">S. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/hep-ex?searchtype=author&query=Ishidoshiro%2C+K">K. Ishidoshiro</a>, <a href="/search/hep-ex?searchtype=author&query=Kamei%2C+Y">Y. Kamei</a>, <a href="/search/hep-ex?searchtype=author&query=Kawada%2C+N">N. Kawada</a>, <a href="/search/hep-ex?searchtype=author&query=Kishimoto%2C+Y">Y. Kishimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/hep-ex?searchtype=author&query=Kurasawa%2C+M">M. Kurasawa</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsui%2C+T">T. Mitsui</a>, <a href="/search/hep-ex?searchtype=author&query=Miyake%2C+H">H. Miyake</a>, <a href="/search/hep-ex?searchtype=author&query=Morita%2C+D">D. Morita</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+T">T. Nakahata</a> , et al. (44 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.09676v2-abstract-short" style="display: inline;"> Particle dark matter could belong to a multiplet that includes an electrically charged state. WIMP dark matter ($蠂^{0}$) accompanied by a negatively charged excited state ($蠂^{-}$) with a small mass difference (e.g. $<$ 20 MeV) can form a bound-state with a nucleus such as xenon. This bound-state formation is rare and the released energy is $\mathcal{O}(1-10$) MeV depending on the nucleus, making… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.09676v2-abstract-full').style.display = 'inline'; document.getElementById('2311.09676v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.09676v2-abstract-full" style="display: none;"> Particle dark matter could belong to a multiplet that includes an electrically charged state. WIMP dark matter ($蠂^{0}$) accompanied by a negatively charged excited state ($蠂^{-}$) with a small mass difference (e.g. $<$ 20 MeV) can form a bound-state with a nucleus such as xenon. This bound-state formation is rare and the released energy is $\mathcal{O}(1-10$) MeV depending on the nucleus, making large liquid scintillator detectors suitable for detection. We searched for bound-state formation events with xenon in two experimental phases of the KamLAND-Zen experiment, a xenon-doped liquid scintillator detector. No statistically significant events were observed. For a benchmark parameter set of WIMP mass $m_{蠂^{0}} = 1$ TeV and mass difference $螖m = 17$ MeV, we set the most stringent upper limits on the recombination cross section times velocity $\langle蟽v\rangle$ and the decay-width of $蠂^{-}$ to $9.2 \times 10^{-30}$ ${\rm cm^3/s}$ and $8.7 \times 10^{-14}$ GeV, respectively at 90% confidence level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.09676v2-abstract-full').style.display = 'none'; document.getElementById('2311.09676v2-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 855 (2024) 138846 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.05105">arXiv:2311.05105</a> <span> [<a href="https://arxiv.org/pdf/2311.05105">pdf</a>, <a href="https://arxiv.org/format/2311.05105">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.109.072014">10.1103/PhysRevD.109.072014 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I-V </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+S">Super-Kamiokande Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Wester%2C+T">T. Wester</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakano%2C+Y">Y. Nakano</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">H. Sekiya</a> , et al. (212 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.05105v1-abstract-short" style="display: inline;"> We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I-V (April 1996-July 2020) data set, including events from an expanded fiducial volume. The data set corresponds to 6511.3 live days and an exposure of 484.2 kiloton-years. Measurements of the neutrino oscillation parameters $螖m^2_{32}$,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05105v1-abstract-full').style.display = 'inline'; document.getElementById('2311.05105v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.05105v1-abstract-full" style="display: none;"> We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I-V (April 1996-July 2020) data set, including events from an expanded fiducial volume. The data set corresponds to 6511.3 live days and an exposure of 484.2 kiloton-years. Measurements of the neutrino oscillation parameters $螖m^2_{32}$, $\sin^2胃_{23}$, $\sin^2 胃_{13}$, $未_{CP}$, and the preference for the neutrino mass ordering are presented with atmospheric neutrino data alone, and with constraints on $\sin^2 胃_{13}$ from reactor neutrino experiments. Our analysis including constraints on $\sin^2 胃_{13}$ favors the normal mass ordering at the 92.3% level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05105v1-abstract-full').style.display = 'none'; document.getElementById('2311.05105v1-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 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 18 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.03842">arXiv:2311.03842</a> <span> [<a href="https://arxiv.org/pdf/2311.03842">pdf</a>, <a href="https://arxiv.org/ps/2311.03842">ps</a>, <a href="https://arxiv.org/format/2311.03842">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 neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Sakai%2C+S">S. Sakai</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakano%2C+Y">Y. Nakano</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">H. Sekiya</a>, <a href="/search/hep-ex?searchtype=author&query=Shiba%2C+H">H. Shiba</a>, <a href="/search/hep-ex?searchtype=author&query=Shimizu%2C+K">K. Shimizu</a> , et al. (211 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.03842v1-abstract-short" style="display: inline;"> We report the first measurement of the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) cross section in the gadolinium-loaded Super-Kamiokande (SK) water Cherenkov detector. In June 2020, SK began a new experimental phase, named SK-Gd, by loading 0.011% by mass of gadolinium into the ultrapure water of the SK detector. The introduction of gadolinium to ultrapure water has the effec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.03842v1-abstract-full').style.display = 'inline'; document.getElementById('2311.03842v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.03842v1-abstract-full" style="display: none;"> We report the first measurement of the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) cross section in the gadolinium-loaded Super-Kamiokande (SK) water Cherenkov detector. In June 2020, SK began a new experimental phase, named SK-Gd, by loading 0.011% by mass of gadolinium into the ultrapure water of the SK detector. The introduction of gadolinium to ultrapure water has the effect of improving the neutron-tagging efficiency. Using a 552.2 day data set from August 2020 to June 2022, we measure the NCQE cross section to be 0.74 $\pm$ 0.22(stat.) $^{+0.85}_{-0.15}$ (syst.) $\times$ 10$^{-38}$ cm$^{2}$/oxygen in the energy range from 160 MeV to 10 GeV, which is consistent with the atmospheric neutrino-flux-averaged theoretical NCQE cross section and the measurement in the SK pure-water phase within the uncertainties. Furthermore, we compare the models of the nucleon-nucleus interactions in water and find that the Binary Cascade model and the Liege Intranuclear Cascade model provide a somewhat better fit to the observed data than the Bertini Cascade model. Since the atmospheric neutrino-oxygen NCQE reactions are one of the main backgrounds in the search for diffuse supernova neutrino background (DSNB), these new results will contribute to future studies - and the potential discovery - of the DSNB in SK. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.03842v1-abstract-full').style.display = 'none'; document.getElementById('2311.03842v1-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.01159">arXiv:2311.01159</a> <span> [<a href="https://arxiv.org/pdf/2311.01159">pdf</a>, <a href="https://arxiv.org/format/2311.01159">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 Periodic Time Variations of the Solar $^8$B Neutrino Flux between 1996 and 2018 in Super-Kamiokande </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakano%2C+Y">Y. Nakano</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">H. Sekiya</a>, <a href="/search/hep-ex?searchtype=author&query=Shiba%2C+H">H. Shiba</a>, <a href="/search/hep-ex?searchtype=author&query=Shimizu%2C+K">K. Shimizu</a>, <a href="/search/hep-ex?searchtype=author&query=Shiozawa%2C+M">M. Shiozawa</a> , et al. (211 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.01159v2-abstract-short" style="display: inline;"> We report a search for time variations of the solar $^8$B neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interaction over 22 calendar years to search for solar neutrino flux modulations with unprecedented precision. Periodic modulations are searched for in a dataset comp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.01159v2-abstract-full').style.display = 'inline'; document.getElementById('2311.01159v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.01159v2-abstract-full" style="display: none;"> We report a search for time variations of the solar $^8$B neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interaction over 22 calendar years to search for solar neutrino flux modulations with unprecedented precision. Periodic modulations are searched for in a dataset comprising five-day interval solar neutrino flux measurements with a maximum likelihood method. We also applied the Lomb-Scargle method to this dataset to compare it with previous reports. The only significant modulation found is due to the elliptic orbit of the Earth around the Sun. The observed modulation is consistent with astronomical data: we measured an eccentricity of (1.53$\pm$0.35)\%, and a perihelion shift of ($-$1.5$\pm$13.5) days. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.01159v2-abstract-full').style.display = 'none'; document.getElementById('2311.01159v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures, 2 tables, and data file: "sksolartimevariation5804d.txt" (the data file updated with additional 3 columns -- R^2 correction, upper-error, lower-error)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett 132, 241803 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.19714">arXiv:2310.19714</a> <span> [<a href="https://arxiv.org/pdf/2310.19714">pdf</a>, <a href="https://arxiv.org/format/2310.19714">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1093/ptep/ptad146">10.1093/ptep/ptad146 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-pressure xenon gas time projection chamber with scalable design and its performance at around the Q value of $^{136}$Xe double-beta decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Yoshida%2C+M">Masashi Yoshida</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">Kazuhiro Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Akiyama%2C+S">Shinichi Akiyama</a>, <a href="/search/hep-ex?searchtype=author&query=Ban%2C+S">Sei Ban</a>, <a href="/search/hep-ex?searchtype=author&query=Hikida%2C+J">Junya Hikida</a>, <a href="/search/hep-ex?searchtype=author&query=Hirose%2C+M">Masanori Hirose</a>, <a href="/search/hep-ex?searchtype=author&query=Ichikawa%2C+A+K">Atsuko K. Ichikawa</a>, <a href="/search/hep-ex?searchtype=author&query=Iwashita%2C+Y">Yoshihisa Iwashita</a>, <a href="/search/hep-ex?searchtype=author&query=Kashino%2C+Y">Yukimasa Kashino</a>, <a href="/search/hep-ex?searchtype=author&query=Kikawa%2C+T">Tatsuya Kikawa</a>, <a href="/search/hep-ex?searchtype=author&query=Minamino%2C+A">Akihiro Minamino</a>, <a href="/search/hep-ex?searchtype=author&query=Miuchi%2C+K">Kentaro Miuchi</a>, <a href="/search/hep-ex?searchtype=author&query=Nakajima%2C+Y">Yasuhiro Nakajima</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K+D">Kiseki D. Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Nakaya%2C+T">Tsuyoshi Nakaya</a>, <a href="/search/hep-ex?searchtype=author&query=Obara%2C+S">Shuhei Obara</a>, <a href="/search/hep-ex?searchtype=author&query=Sakashita%2C+K">Ken Sakashita</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">Hiroyuki Sekiya</a>, <a href="/search/hep-ex?searchtype=author&query=Shinagawa%2C+H">Hibiki Shinagawa</a>, <a href="/search/hep-ex?searchtype=author&query=Sugashima%2C+B">Bungo Sugashima</a>, <a href="/search/hep-ex?searchtype=author&query=Urano%2C+S">Soki Urano</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="2310.19714v2-abstract-short" style="display: inline;"> We have been developing a high-pressure xenon gas time projection chamber (TPC) to search for neutrinoless double beta ($0谓尾尾$) decay of $^{136}$Xe. The unique feature of this TPC is in the detection part of ionization electrons, called ELCC. ELCC is composed of multiple units, and one unit covers 48.5 $\mathrm{cm}^2$. A 180 L size prototype detector with 12 units, 672 channels, of ELCC was constr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.19714v2-abstract-full').style.display = 'inline'; document.getElementById('2310.19714v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.19714v2-abstract-full" style="display: none;"> We have been developing a high-pressure xenon gas time projection chamber (TPC) to search for neutrinoless double beta ($0谓尾尾$) decay of $^{136}$Xe. The unique feature of this TPC is in the detection part of ionization electrons, called ELCC. ELCC is composed of multiple units, and one unit covers 48.5 $\mathrm{cm}^2$. A 180 L size prototype detector with 12 units, 672 channels, of ELCC was constructed and operated with 7.6 bar natural xenon gas to evaluate the performance of the detector at around the Q value of $^{136}$Xe $0谓尾尾$. The obtained FWHM energy resolution is (0.73 $\pm$ 0.11) % at 1836 keV. This corresponds to (0.60 $\pm$ 0.03) % to (0.70 $\pm$ 0.21) % of energy resolution at the Q value of $^{136}Xe$ $0谓尾尾$. This result shows the scalability of the AXEL detector with ELCC while maintaining high energy resolution. Factors determining the energy resolution were quantitatively evaluated and the result indicates further improvement is feasible. Reconstructed track images show distinctive structures at the endpoint of electron tracks, which will be an important feature to distinguish $0谓尾尾$ signals from gamma-ray backgrounds. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.19714v2-abstract-full').style.display = 'none'; document.getElementById('2310.19714v2-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 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">33 pages, 24 figures, preprint accepted by PTEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Progress of Theoretical and Experimental Physics, Volume 2024 Issue 1, 013H01 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.16606">arXiv:2308.16606</a> <span> [<a href="https://arxiv.org/pdf/2308.16606">pdf</a>, <a href="https://arxiv.org/ps/2308.16606">ps</a>, <a href="https://arxiv.org/format/2308.16606">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.108.092009">10.1103/PhysRevD.108.092009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of the $谓_渭$ and $\bar谓_渭$-induced Coherent Charged Pion Production Cross Sections on $^{12}C$ by the T2K experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Akhlaq%2C+N">N. Akhlaq</a>, <a href="/search/hep-ex?searchtype=author&query=Akutsu%2C+R">R. Akutsu</a>, <a href="/search/hep-ex?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/hep-ex?searchtype=author&query=Monsalve%2C+S+A">S. Alonso Monsalve</a>, <a href="/search/hep-ex?searchtype=author&query=Alt%2C+C">C. Alt</a>, <a href="/search/hep-ex?searchtype=author&query=Andreopoulos%2C+C">C. Andreopoulos</a>, <a href="/search/hep-ex?searchtype=author&query=Antonova%2C+M">M. Antonova</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+S">S. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arihara%2C+T">T. Arihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asada%2C+Y">Y. Asada</a>, <a href="/search/hep-ex?searchtype=author&query=Ashida%2C+Y">Y. Ashida</a>, <a href="/search/hep-ex?searchtype=author&query=Atkin%2C+E+T">E. T. Atkin</a>, <a href="/search/hep-ex?searchtype=author&query=Barbi%2C+M">M. Barbi</a>, <a href="/search/hep-ex?searchtype=author&query=Barker%2C+G+J">G. J. Barker</a>, <a href="/search/hep-ex?searchtype=author&query=Barr%2C+G">G. Barr</a>, <a href="/search/hep-ex?searchtype=author&query=Barrow%2C+D">D. Barrow</a>, <a href="/search/hep-ex?searchtype=author&query=Batkiewicz-Kwasniak%2C+M">M. Batkiewicz-Kwasniak</a>, <a href="/search/hep-ex?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/hep-ex?searchtype=author&query=Berns%2C+L">L. Berns</a>, <a href="/search/hep-ex?searchtype=author&query=Bhadra%2C+S">S. Bhadra</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Blondel%2C+A">A. Blondel</a>, <a href="/search/hep-ex?searchtype=author&query=Bolognesi%2C+S">S. Bolognesi</a>, <a href="/search/hep-ex?searchtype=author&query=Bonus%2C+T">T. Bonus</a> , et al. (359 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2308.16606v2-abstract-short" style="display: inline;"> We report an updated measurement of the $谓_渭$-induced, and the first measurement of the $\bar谓_渭$-induced coherent charged pion production cross section on $^{12}C$ nuclei in the T2K experiment. This is measured in a restricted region of the final-state phase space for which $p_{渭,蟺} > 0.2$ GeV, $\cos(胃_渭) > 0.8$ and $\cos(胃_蟺) > 0.6$, and at a mean (anti)neutrino energy of 0.85 GeV using the T2K… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.16606v2-abstract-full').style.display = 'inline'; document.getElementById('2308.16606v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.16606v2-abstract-full" style="display: none;"> We report an updated measurement of the $谓_渭$-induced, and the first measurement of the $\bar谓_渭$-induced coherent charged pion production cross section on $^{12}C$ nuclei in the T2K experiment. This is measured in a restricted region of the final-state phase space for which $p_{渭,蟺} > 0.2$ GeV, $\cos(胃_渭) > 0.8$ and $\cos(胃_蟺) > 0.6$, and at a mean (anti)neutrino energy of 0.85 GeV using the T2K near detector. The measured $谓_渭$ CC coherent pion production flux-averaged cross section on $^{12}C$ is $(2.98 \pm 0.37 (stat.) \pm 0.31 (syst.) \substack{ +0.49 \\ -0.00 } \mathrm{ (Q^2\,model)}) \times 10^{-40}~\mathrm{cm}^{2}$. The new measurement of the $\bar谓_渭$-induced cross section on $^{12}{C}$ is $(3.05 \pm 0.71 (stat.) \pm 0.39 (syst.) \substack{ +0.74 \\ -0.00 } \mathrm{(Q^2\,model)}) \times 10^{-40}~\mathrm{cm}^{2}$. The results are compatible with both the NEUT 5.4.0 Berger-Sehgal (2009) and GENIE 2.8.0 Rein-Sehgal (2007) model predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.16606v2-abstract-full').style.display = 'none'; document.getElementById('2308.16606v2-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 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D 108 (2023) 9, 092009 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.12294">arXiv:2306.12294</a> <span> [<a href="https://arxiv.org/pdf/2306.12294">pdf</a>, <a href="https://arxiv.org/format/2306.12294">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.131.121802">10.1103/PhysRevLett.131.121802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for a $蟿^+蟿^-$ resonance in $e^{+}e^{-}\rightarrow 渭^{+}渭^{-} 蟿^+蟿^-$ events with the Belle II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Belle+II+Collaboration"> Belle II Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Adamczyk%2C+K">K. Adamczyk</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aversano%2C+M">M. Aversano</a>, <a href="/search/hep-ex?searchtype=author&query=Babu%2C+V">V. Babu</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a> , et al. (442 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.12294v2-abstract-short" style="display: inline;"> We report the first search for a non-standard-model resonance decaying into $蟿$ pairs in $e^{+}e^{-}\rightarrow 渭^{+}渭^{-} 蟿^+蟿^-$ events in the 3.6-10 GeV/$c^{2}$ mass range. We use a 62.8 fb$^{-1}$ sample of $e^+e^-$ collisions collected at a center-of-mass energy of 10.58 GeV by the Belle II experiment at the SuperKEKB collider. The analysis probes three different models predicting a spin-1 par… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.12294v2-abstract-full').style.display = 'inline'; document.getElementById('2306.12294v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.12294v2-abstract-full" style="display: none;"> We report the first search for a non-standard-model resonance decaying into $蟿$ pairs in $e^{+}e^{-}\rightarrow 渭^{+}渭^{-} 蟿^+蟿^-$ events in the 3.6-10 GeV/$c^{2}$ mass range. We use a 62.8 fb$^{-1}$ sample of $e^+e^-$ collisions collected at a center-of-mass energy of 10.58 GeV by the Belle II experiment at the SuperKEKB collider. The analysis probes three different models predicting a spin-1 particle coupling only to the heavier lepton families, a Higgs-like spin-0 particle that couples preferentially to charged leptons (leptophilic scalar), and an axion-like particle, respectively. We observe no evidence for a signal and set exclusion limits at 90% confidence level on the product of cross section and branching fraction into $蟿$ pairs, ranging from 0.7 fb to 24 fb, and on the couplings of these processes. We obtain world-leading constraints on the couplings for the leptophilic scalar model for masses above 6.5 GeV/$c^2$ and for the axion-like particle model over the entire mass range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.12294v2-abstract-full').style.display = 'none'; document.getElementById('2306.12294v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KEK preprint: 2022-32, Belle II preprint: 2022-006 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 131, 121802 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.12355">arXiv:2305.12355</a> <span> [<a href="https://arxiv.org/pdf/2305.12355">pdf</a>, <a href="https://arxiv.org/format/2305.12355">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Development of AC-LGAD detector with finer pitch electrodes for high energy physics experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Kita%2C+S">Sayuka Kita</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">Koji Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Imamura%2C+T">Tomoka Imamura</a>, <a href="/search/hep-ex?searchtype=author&query=Goya%2C+I">Ikumi Goya</a>, <a href="/search/hep-ex?searchtype=author&query=Hara%2C+K">Kazuhiko Hara</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="2305.12355v1-abstract-short" style="display: inline;"> Low-Gain Avalanche Diode (LGAD) sensor is one of candidate sensors for the tracker at future hadron collider experiments. To use this sensor as a tracking detector, AC-LGAD sensor is being developed which has both timing and spatial resolutions. In high luminosity environments, good timing resolution (typically 30 ps) together with $\mathcal{O}$(10) ${\mathrm渭}$m spatial resolution helps to reduce… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.12355v1-abstract-full').style.display = 'inline'; document.getElementById('2305.12355v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.12355v1-abstract-full" style="display: none;"> Low-Gain Avalanche Diode (LGAD) sensor is one of candidate sensors for the tracker at future hadron collider experiments. To use this sensor as a tracking detector, AC-LGAD sensor is being developed which has both timing and spatial resolutions. In high luminosity environments, good timing resolution (typically 30 ps) together with $\mathcal{O}$(10) ${\mathrm渭}$m spatial resolution helps to reduce pileup effect and reconstruct tracks correctly. By optimizing fabrication parameters, 80 ${\mathrm渭}$m pitch strip and 100 ${\mathrm渭}$m pitch pixel sensors are successfully produced. The signal height (MPV) was 39.26$\pm$0.08 mV and 128.9$\pm$3.3 mV, respectively, for penetrating $尾$ particles. The observed 60% of signal reduction of the strip sensor is explained by a larger inter-electrode capacitance compared with the pixel sensor. In this paper, we present the performance of fine electrode pitch AC-LGAD sensors including the pulse height and cross-talk of pixel and strip type sensors evaluated using a $尾$-ray source and the detection efficiency measured in an 800 MeV electron beam. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.12355v1-abstract-full').style.display = 'none'; document.getElementById('2305.12355v1-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 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">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 6 figures, Submitted to Japan Conference Proceedings</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.09916">arXiv:2305.09916</a> <span> [<a href="https://arxiv.org/pdf/2305.09916">pdf</a>, <a href="https://arxiv.org/format/2305.09916">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"> Updated T2K measurements of muon neutrino and antineutrino disappearance using 3.6 $\times$ 10$^{21}$ protons on target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Akhlaq%2C+N">N. Akhlaq</a>, <a href="/search/hep-ex?searchtype=author&query=Akutsu%2C+R">R. Akutsu</a>, <a href="/search/hep-ex?searchtype=author&query=Alarakia-Charles%2C+H">H. Alarakia-Charles</a>, <a href="/search/hep-ex?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/hep-ex?searchtype=author&query=Hakim%2C+Y+I+A">Y. I. Alj Hakim</a>, <a href="/search/hep-ex?searchtype=author&query=Monsalve%2C+S+A">S. Alonso Monsalve</a>, <a href="/search/hep-ex?searchtype=author&query=Alt%2C+C">C. Alt</a>, <a href="/search/hep-ex?searchtype=author&query=Andreopoulos%2C+C">C. Andreopoulos</a>, <a href="/search/hep-ex?searchtype=author&query=Antonova%2C+M">M. Antonova</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+S">S. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arihara%2C+T">T. Arihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asada%2C+Y">Y. Asada</a>, <a href="/search/hep-ex?searchtype=author&query=Ashida%2C+Y">Y. Ashida</a>, <a href="/search/hep-ex?searchtype=author&query=Atkin%2C+E+T">E. T. Atkin</a>, <a href="/search/hep-ex?searchtype=author&query=Barbi%2C+M">M. Barbi</a>, <a href="/search/hep-ex?searchtype=author&query=Barker%2C+G+J">G. J. Barker</a>, <a href="/search/hep-ex?searchtype=author&query=Barr%2C+G">G. Barr</a>, <a href="/search/hep-ex?searchtype=author&query=Barrow%2C+D">D. Barrow</a>, <a href="/search/hep-ex?searchtype=author&query=Batkiewicz-Kwasniak%2C+M">M. Batkiewicz-Kwasniak</a>, <a href="/search/hep-ex?searchtype=author&query=Bench%2C+F">F. Bench</a>, <a href="/search/hep-ex?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/hep-ex?searchtype=author&query=Berns%2C+L">L. Berns</a>, <a href="/search/hep-ex?searchtype=author&query=Bhadra%2C+S">S. Bhadra</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a> , et al. (385 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.09916v2-abstract-short" style="display: inline;"> Muon neutrino and antineutrino disappearance probabilities are identical in the standard three-flavor neutrino oscillation framework, but CPT violation and non-standard interactions can violate this symmetry. In this work we report the measurements of $\sin^{2} 胃_{23}$ and $螖m_{32}^2$ independently for neutrinos and antineutrinos. The aforementioned symmetry violation would manifest as an inconsis… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.09916v2-abstract-full').style.display = 'inline'; document.getElementById('2305.09916v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.09916v2-abstract-full" style="display: none;"> Muon neutrino and antineutrino disappearance probabilities are identical in the standard three-flavor neutrino oscillation framework, but CPT violation and non-standard interactions can violate this symmetry. In this work we report the measurements of $\sin^{2} 胃_{23}$ and $螖m_{32}^2$ independently for neutrinos and antineutrinos. The aforementioned symmetry violation would manifest as an inconsistency in the neutrino and antineutrino oscillation parameters. The analysis discussed here uses a total of 1.97$\times$10$^{21}$ and 1.63$\times$10$^{21}$ protons on target taken with a neutrino and antineutrino beam respectively, and benefits from improved flux and cross-section models, new near detector samples and more than double the data reducing the overall uncertainty of the result. No significant deviation is observed, consistent with the standard neutrino oscillation picture. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.09916v2-abstract-full').style.display = 'none'; document.getElementById('2305.09916v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.05135">arXiv:2305.05135</a> <span> [<a href="https://arxiv.org/pdf/2305.05135">pdf</a>, <a href="https://arxiv.org/format/2305.05135">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 Astrophysical Phenomena">astro-ph.HE</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="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.3847/2041-8213/acdc9e">10.3847/2041-8213/acdc9e <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for astrophysical electron antineutrinos in Super-Kamiokande with 0.01wt% gadolinium-loaded water </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Bronner%2C+C">C. Bronner</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakano%2C+Y">Y. Nakano</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Okamoto%2C+K">K. Okamoto</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">H. Sekiya</a>, <a href="/search/hep-ex?searchtype=author&query=Shiba%2C+H">H. Shiba</a> , et al. (216 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="2305.05135v2-abstract-short" style="display: inline;"> We report the first search result for the flux of astrophysical electron antineutrinos for energies O(10) MeV in the gadolinium-loaded Super-Kamiokande (SK) detector. In June 2020, gadolinium was introduced to the ultra-pure water of the SK detector in order to detect neutrons more efficiently. In this new experimental phase, SK-Gd, we can search for electron antineutrinos via inverse beta decay w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05135v2-abstract-full').style.display = 'inline'; document.getElementById('2305.05135v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.05135v2-abstract-full" style="display: none;"> We report the first search result for the flux of astrophysical electron antineutrinos for energies O(10) MeV in the gadolinium-loaded Super-Kamiokande (SK) detector. In June 2020, gadolinium was introduced to the ultra-pure water of the SK detector in order to detect neutrons more efficiently. In this new experimental phase, SK-Gd, we can search for electron antineutrinos via inverse beta decay with efficient background rejection and higher signal efficiency thanks to the high efficiency of the neutron tagging technique. In this paper, we report the result for the initial stage of SK-Gd with a $22.5\times552$ $\rm kton\cdot day$ exposure at 0.01% Gd mass concentration. No significant excess over the expected background in the observed events is found for the neutrino energies below 31.3 MeV. Thus, the flux upper limits are placed at the 90% confidence level. The limits and sensitivities are already comparable with the previous SK result with pure-water ($22.5 \times 2970 \rm kton\cdot day$) owing to the enhanced neutron tagging. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05135v2-abstract-full').style.display = 'none'; document.getElementById('2305.05135v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.04759">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/2303.14228">arXiv:2303.14228</a> <span> [<a href="https://arxiv.org/pdf/2303.14228">pdf</a>, <a href="https://arxiv.org/format/2303.14228">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.108.112009">10.1103/PhysRevD.108.112009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First measurement of muon neutrino charged-current interactions on hydrocarbon without pions in the final state using multiple detectors with correlated energy spectra at T2K </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Akhlaq%2C+N">N. Akhlaq</a>, <a href="/search/hep-ex?searchtype=author&query=Akutsu%2C+R">R. Akutsu</a>, <a href="/search/hep-ex?searchtype=author&query=Alarakia-Charles%2C+H">H. Alarakia-Charles</a>, <a href="/search/hep-ex?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/hep-ex?searchtype=author&query=Hakim%2C+Y+I+A">Y. I. Alj Hakim</a>, <a href="/search/hep-ex?searchtype=author&query=Monsalve%2C+S+A">S. Alonso Monsalve</a>, <a href="/search/hep-ex?searchtype=author&query=Alt%2C+C">C. Alt</a>, <a href="/search/hep-ex?searchtype=author&query=Andreopoulos%2C+C">C. Andreopoulos</a>, <a href="/search/hep-ex?searchtype=author&query=Antonova%2C+M">M. Antonova</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+S">S. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arihara%2C+T">T. Arihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asada%2C+Y">Y. Asada</a>, <a href="/search/hep-ex?searchtype=author&query=Ashida%2C+Y">Y. Ashida</a>, <a href="/search/hep-ex?searchtype=author&query=Atkin%2C+E+T">E. T. Atkin</a>, <a href="/search/hep-ex?searchtype=author&query=Barbi%2C+M">M. Barbi</a>, <a href="/search/hep-ex?searchtype=author&query=Barker%2C+G+J">G. J. Barker</a>, <a href="/search/hep-ex?searchtype=author&query=Barr%2C+G">G. Barr</a>, <a href="/search/hep-ex?searchtype=author&query=Barrow%2C+D">D. Barrow</a>, <a href="/search/hep-ex?searchtype=author&query=Batkiewicz-Kwasniak%2C+M">M. Batkiewicz-Kwasniak</a>, <a href="/search/hep-ex?searchtype=author&query=Bench%2C+F">F. Bench</a>, <a href="/search/hep-ex?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/hep-ex?searchtype=author&query=Berns%2C+L">L. Berns</a>, <a href="/search/hep-ex?searchtype=author&query=Bhadra%2C+S">S. Bhadra</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</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="2303.14228v2-abstract-short" style="display: inline;"> This paper reports the first measurement of muon neutrino charged-current interactions without pions in the final state using multiple detectors with correlated energy spectra at T2K. The data was collected on hydrocarbon targets using the off-axis T2K near detector (ND280) and the on-axis T2K near detector (INGRID) with neutrino energy spectra peaked at 0.6 GeV and 1.1 GeV respectively. The corre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.14228v2-abstract-full').style.display = 'inline'; document.getElementById('2303.14228v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.14228v2-abstract-full" style="display: none;"> This paper reports the first measurement of muon neutrino charged-current interactions without pions in the final state using multiple detectors with correlated energy spectra at T2K. The data was collected on hydrocarbon targets using the off-axis T2K near detector (ND280) and the on-axis T2K near detector (INGRID) with neutrino energy spectra peaked at 0.6 GeV and 1.1 GeV respectively. The correlated neutrino flux presents an opportunity to reduce the impact of the flux uncertainty and to study the energy dependence of neutrino interactions. The extracted double-differential cross sections are compared to several Monte Carlo neutrino-nucleus interaction event generators showing the agreement between both detectors individually and with the correlated result. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.14228v2-abstract-full').style.display = 'none'; document.getElementById('2303.14228v2-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">Updated discussion in Sec. V-A; Updated author list</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.08354">arXiv:2303.08354</a> <span> [<a href="https://arxiv.org/pdf/2303.08354">pdf</a>, <a href="https://arxiv.org/format/2303.08354">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.107.112009">10.1103/PhysRevD.107.112009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the branching fraction and $\it CP$ asymmetry of $B^{0} \rightarrow 蟺^{0} 蟺^{0}$ decays using $198 \times 10^6$ $B\overline{B}$ pairs in 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=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a> , et al. (403 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="2303.08354v3-abstract-short" style="display: inline;"> We report measurements of the branching fraction and $\it CP$ asymmetry in $B^{0} \to 蟺^{0} 蟺^{0}$ decays reconstructed at Belle II in an electron-positron collision sample containing $198 \times 10^{6}$ $B\overline{B}$ pairs. We measure a branching fraction $\mathcal{B}(\Bpipi) = (1.38 \pm 0.27 \pm 0.22) \times 10^{-6}$ and a $\it CP$ asymmetry $\Acp(\Bpipi) = 0.14 \pm 0.46 \pm 0.07$, where the f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.08354v3-abstract-full').style.display = 'inline'; document.getElementById('2303.08354v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.08354v3-abstract-full" style="display: none;"> We report measurements of the branching fraction and $\it CP$ asymmetry in $B^{0} \to 蟺^{0} 蟺^{0}$ decays reconstructed at Belle II in an electron-positron collision sample containing $198 \times 10^{6}$ $B\overline{B}$ pairs. We measure a branching fraction $\mathcal{B}(\Bpipi) = (1.38 \pm 0.27 \pm 0.22) \times 10^{-6}$ and a $\it CP$ asymmetry $\Acp(\Bpipi) = 0.14 \pm 0.46 \pm 0.07$, where the first uncertainty is statistical and the second is systematic. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.08354v3-abstract-full').style.display = 'none'; document.getElementById('2303.08354v3-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2023-004, KEK Preprint 2022-59 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.03222">arXiv:2303.03222</a> <span> [<a href="https://arxiv.org/pdf/2303.03222">pdf</a>, <a href="https://arxiv.org/format/2303.03222">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/10.1140/epjc/s10052-023-11819-x">10.1140/epjc/s10052-023-11819-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of neutrino oscillation parameters from the T2K experiment using $3.6\times10^{21}$ protons on target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+T2K+Collaboration"> The T2K Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Akhlaq%2C+N">N. Akhlaq</a>, <a href="/search/hep-ex?searchtype=author&query=Akutsu%2C+R">R. Akutsu</a>, <a href="/search/hep-ex?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/hep-ex?searchtype=author&query=Monsalve%2C+S+A">S. Alonso Monsalve</a>, <a href="/search/hep-ex?searchtype=author&query=Alt%2C+C">C. Alt</a>, <a href="/search/hep-ex?searchtype=author&query=Andreopoulos%2C+C">C. Andreopoulos</a>, <a href="/search/hep-ex?searchtype=author&query=Antonova%2C+M">M. Antonova</a>, <a href="/search/hep-ex?searchtype=author&query=Aoki%2C+S">S. Aoki</a>, <a href="/search/hep-ex?searchtype=author&query=Arihara%2C+T">T. Arihara</a>, <a href="/search/hep-ex?searchtype=author&query=Asada%2C+Y">Y. Asada</a>, <a href="/search/hep-ex?searchtype=author&query=Ashida%2C+Y">Y. Ashida</a>, <a href="/search/hep-ex?searchtype=author&query=Atkin%2C+E+T">E. T. Atkin</a>, <a href="/search/hep-ex?searchtype=author&query=Barbi%2C+M">M. Barbi</a>, <a href="/search/hep-ex?searchtype=author&query=Barker%2C+G+J">G. J. Barker</a>, <a href="/search/hep-ex?searchtype=author&query=Barr%2C+G">G. Barr</a>, <a href="/search/hep-ex?searchtype=author&query=Barrow%2C+D">D. Barrow</a>, <a href="/search/hep-ex?searchtype=author&query=Batkiewicz-Kwasniak%2C+M">M. Batkiewicz-Kwasniak</a>, <a href="/search/hep-ex?searchtype=author&query=Bench%2C+F">F. Bench</a>, <a href="/search/hep-ex?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/hep-ex?searchtype=author&query=Berns%2C+L">L. Berns</a>, <a href="/search/hep-ex?searchtype=author&query=Bhadra%2C+S">S. Bhadra</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Blondel%2C+A">A. Blondel</a> , et al. (376 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="2303.03222v3-abstract-short" style="display: inline;"> The T2K experiment presents new measurements of neutrino oscillation parameters using $19.7(16.3)\times10^{20}$ protons on target (POT) in (anti-)neutrino mode at the far detector (FD). Compared to the previous analysis, an additional $4.7\times10^{20}$ POT neutrino data was collected at the FD. Significant improvements were made to the analysis methodology, with the near-detector analysis introdu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.03222v3-abstract-full').style.display = 'inline'; document.getElementById('2303.03222v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.03222v3-abstract-full" style="display: none;"> The T2K experiment presents new measurements of neutrino oscillation parameters using $19.7(16.3)\times10^{20}$ protons on target (POT) in (anti-)neutrino mode at the far detector (FD). Compared to the previous analysis, an additional $4.7\times10^{20}$ POT neutrino data was collected at the FD. Significant improvements were made to the analysis methodology, with the near-detector analysis introducing new selections and using more than double the data. Additionally, this is the first T2K oscillation analysis to use NA61/SHINE data on a replica of the T2K target to tune the neutrino flux model, and the neutrino interaction model was improved to include new nuclear effects and calculations. Frequentist and Bayesian analyses are presented, including results on $\sin^2胃_{13}$ and the impact of priors on the $未_\mathrm{CP}$ measurement. Both analyses prefer the normal mass ordering and upper octant of $\sin^2胃_{23}$ with a nearly maximally CP-violating phase. Assuming the normal ordering and using the constraint on $\sin^2胃_{13}$ from reactors, $\sin^2胃_{23}=0.561^{+0.021}_{-0.032}$ using Feldman--Cousins corrected intervals, and $螖m^2_{32}=2.494_{-0.058}^{+0.041}\times10^{-3}~\mathrm{eV^2}$ using constant $螖蠂^{2}$ intervals. The CP-violating phase is constrained to $未_\mathrm{CP}=-1.97_{-0.70}^{+0.97}$ using Feldman--Cousins corrected intervals, and $未_\mathrm{CP}=0,蟺$ is excluded at more than 90% confidence level. A Jarlskog invariant of zero is excluded at more than $2蟽$ credible level using a flat prior in $未_\mathrm{CP}$, and just below $2蟽$ using a flat prior in $\sin未_\mathrm{CP}$. When the external constraint on $\sin^2胃_{13}$ is removed, $\sin^2胃_{13}=28.0^{+2.8}_{-6.5}\times10^{-3}$, in agreement with measurements from reactor experiments. These results are consistent with previous T2K analyses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.03222v3-abstract-full').style.display = 'none'; document.getElementById('2303.03222v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 83, 782 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.12898">arXiv:2302.12898</a> <span> [<a href="https://arxiv.org/pdf/2302.12898">pdf</a>, <a href="https://arxiv.org/format/2302.12898">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.L091102">10.1103/PhysRevD.107.L091102 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of decay-time-dependent $\textit{CP}$ violation in $B^0 \to J/蠄K^0_S$ 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=Adachi%2C+I">I. Adachi</a>, <a href="/search/hep-ex?searchtype=author&query=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=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. (370 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.12898v1-abstract-short" style="display: inline;"> We report a measurement of the mixing-induced and direct $\textit{CP}$ violation parameters $S_{\text{CP}}$ and $A_{\text{CP}}$ from $B^0 \to J/蠄K^0_S$ decays reconstructed by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The data, collected at the center-of-mass energy of the $违(4S)$ resonance, correspond to $190\text{fb}^{-1}$ of integrated luminosity. We… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12898v1-abstract-full').style.display = 'inline'; document.getElementById('2302.12898v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.12898v1-abstract-full" style="display: none;"> We report a measurement of the mixing-induced and direct $\textit{CP}$ violation parameters $S_{\text{CP}}$ and $A_{\text{CP}}$ from $B^0 \to J/蠄K^0_S$ decays reconstructed by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The data, collected at the center-of-mass energy of the $违(4S)$ resonance, correspond to $190\text{fb}^{-1}$ of integrated luminosity. We measure ${S_{\text{CP}} = 0.720\pm0.062\pm0.016}$ and $A_{\text{CP}} = 0.094\pm0.044^{+0.042}_{-0.017}$, where the first uncertainties are statistical and the second systematic. In the Standard Model, $S_{\text{CP}}$ equals $\sin(2蠁_1)$ to a good approximation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12898v1-abstract-full').style.display = 'none'; document.getElementById('2302.12898v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.12791">arXiv:2302.12791</a> <span> [<a href="https://arxiv.org/pdf/2302.12791">pdf</a>, <a href="https://arxiv.org/format/2302.12791">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.L091102">10.1103/PhysRevD.107.L091102 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the $B^0$ lifetime and flavor-oscillation frequency using hadronic decays reconstructed 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=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+J">J. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Bennett%2C+J+V">J. V. Bennett</a> , et al. (371 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.12791v2-abstract-short" style="display: inline;"> We measure the $B^0$ lifetime and flavor-oscillation frequency using $B^0\to D^{(*)-}蟺^+$ decays collected by the Belle II experiment in asymmetric-energy $e^+e^-$ collisions produced by the SuperKEKB collider operating at the $违(4S)$ resonance. We fit the decay-time distribution of signal decays, where the initial flavor is determined by identifying the flavor of the other $B$ meson in the event.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12791v2-abstract-full').style.display = 'inline'; document.getElementById('2302.12791v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.12791v2-abstract-full" style="display: none;"> We measure the $B^0$ lifetime and flavor-oscillation frequency using $B^0\to D^{(*)-}蟺^+$ decays collected by the Belle II experiment in asymmetric-energy $e^+e^-$ collisions produced by the SuperKEKB collider operating at the $违(4S)$ resonance. We fit the decay-time distribution of signal decays, where the initial flavor is determined by identifying the flavor of the other $B$ meson in the event. The results, based on $33000$ signal decays reconstructed in a data sample corresponding to ${190}\text{fb}^{-1}$, are $蟿_{B^0} = {1.499}\pm{0.013}\pm{0.008}\;\text{ps}$, $螖m_d = {0.516}\pm{0.008}\pm{0.005}\;\text{ps}^{-1}$, where the first uncertainties are statistical and the second are systematic. These results are consistent with the world-average values. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12791v2-abstract-full').style.display = 'none'; document.getElementById('2302.12791v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 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">Report number:</span> Belle II Preprint 2023-001, KEK Preprint 2022-56 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.09307">arXiv:2301.09307</a> <span> [<a href="https://arxiv.org/pdf/2301.09307">pdf</a>, <a href="https://arxiv.org/format/2301.09307">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <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"> Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+K">KamLAND-Zen Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+S">S. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Asami%2C+S">S. Asami</a>, <a href="/search/hep-ex?searchtype=author&query=Eizuka%2C+M">M. Eizuka</a>, <a href="/search/hep-ex?searchtype=author&query=Futagi%2C+S">S. Futagi</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+A">A. Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Gando%2C+Y">Y. Gando</a>, <a href="/search/hep-ex?searchtype=author&query=Gima%2C+T">T. Gima</a>, <a href="/search/hep-ex?searchtype=author&query=Goto%2C+A">A. Goto</a>, <a href="/search/hep-ex?searchtype=author&query=Hachiya%2C+T">T. Hachiya</a>, <a href="/search/hep-ex?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ichimura%2C+K">K. Ichimura</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+S">S. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/hep-ex?searchtype=author&query=Ishidoshiro%2C+K">K. Ishidoshiro</a>, <a href="/search/hep-ex?searchtype=author&query=Kamei%2C+Y">Y. Kamei</a>, <a href="/search/hep-ex?searchtype=author&query=Kawada%2C+N">N. Kawada</a>, <a href="/search/hep-ex?searchtype=author&query=Kishimoto%2C+Y">Y. Kishimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/hep-ex?searchtype=author&query=Kurasawa%2C+M">M. Kurasawa</a>, <a href="/search/hep-ex?searchtype=author&query=Mitsui%2C+T">T. Mitsui</a>, <a href="/search/hep-ex?searchtype=author&query=Miyake%2C+H">H. Miyake</a> , et al. (42 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="2301.09307v1-abstract-short" style="display: inline;"> Cosmic-ray muons produce various radioisotopes when passing through material. These spallation products can be backgrounds for rare event searches such as in solar neutrino, double-beta decay, and dark matter search experiments. The KamLAND-Zen experiment searches for neutrinoless double-beta decay in 745kg of xenon dissolved in liquid scintillator. The experiment includes dead-time-free electroni… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.09307v1-abstract-full').style.display = 'inline'; document.getElementById('2301.09307v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.09307v1-abstract-full" style="display: none;"> Cosmic-ray muons produce various radioisotopes when passing through material. These spallation products can be backgrounds for rare event searches such as in solar neutrino, double-beta decay, and dark matter search experiments. The KamLAND-Zen experiment searches for neutrinoless double-beta decay in 745kg of xenon dissolved in liquid scintillator. The experiment includes dead-time-free electronics with a high efficiency for detecting muon-induced neutrons. The production yields of different radioisotopes are measured with a combination of delayed coincidence techniques, newly developed muon reconstruction and xenon spallation identification methods. The observed xenon spallation products are consistent with results from the FLUKA and Geant4 simulation codes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.09307v1-abstract-full').style.display = 'none'; document.getElementById('2301.09307v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 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/2301.08266">arXiv:2301.08266</a> <span> [<a href="https://arxiv.org/pdf/2301.08266">pdf</a>, <a href="https://arxiv.org/format/2301.08266">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.131.051804">10.1103/PhysRevLett.131.051804 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A test of light-lepton universality in the rates of inclusive semileptonic $B$-meson 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=Aggarwal%2C+L">L. Aggarwal</a>, <a href="/search/hep-ex?searchtype=author&query=Ahmed%2C+H">H. Ahmed</a>, <a href="/search/hep-ex?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/hep-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/hep-ex?searchtype=author&query=Aloisio%2C+A">A. Aloisio</a>, <a href="/search/hep-ex?searchtype=author&query=Ky%2C+N+A">N. Anh Ky</a>, <a href="/search/hep-ex?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/hep-ex?searchtype=author&query=Atmacan%2C+H">H. Atmacan</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+T">T. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ex?searchtype=author&query=Bae%2C+H">H. Bae</a>, <a href="/search/hep-ex?searchtype=author&query=Bahinipati%2C+S">S. Bahinipati</a>, <a href="/search/hep-ex?searchtype=author&query=Bambade%2C+P">P. Bambade</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+S">Sw. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Bansal%2C+S">S. Bansal</a>, <a href="/search/hep-ex?searchtype=author&query=Barrett%2C+M">M. Barrett</a>, <a href="/search/hep-ex?searchtype=author&query=Baudot%2C+J">J. Baudot</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Baur%2C+A">A. Baur</a>, <a href="/search/hep-ex?searchtype=author&query=Beaubien%2C+A">A. Beaubien</a>, <a href="/search/hep-ex?searchtype=author&query=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>, <a href="/search/hep-ex?searchtype=author&query=Bernlochner%2C+F+U">F. U. Bernlochner</a> , et al. (327 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="2301.08266v2-abstract-short" style="display: inline;"> We present the first measurement of the ratio of branching fractions of inclusive semileptonic $B$-meson decays, $R(X_{e/渭}) = \mathcal{B}(B\to X \, e \, 谓) / \mathcal{B}(B\to X \, 渭\, 谓)$, a precision test of electron-muon universality, using data corresponding to $189\,\mathrm{fb}^{-1}$ from electron-positron collisions collected with the Belle II detector. In events where the partner $B$ meson… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.08266v2-abstract-full').style.display = 'inline'; document.getElementById('2301.08266v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.08266v2-abstract-full" style="display: none;"> We present the first measurement of the ratio of branching fractions of inclusive semileptonic $B$-meson decays, $R(X_{e/渭}) = \mathcal{B}(B\to X \, e \, 谓) / \mathcal{B}(B\to X \, 渭\, 谓)$, a precision test of electron-muon universality, using data corresponding to $189\,\mathrm{fb}^{-1}$ from electron-positron collisions collected with the Belle II detector. In events where the partner $B$ meson is fully reconstructed, we use fits to the lepton momentum spectra above $1.3\,\mathrm{GeV}/c$ to obtain $R(X_{e/渭}) = 1.007 \pm 0.009~(\mathrm{stat}) \pm 0.019~(\mathrm{syst})$, which is the most precise lepton-universality test of its kind and agrees with the standard-model expectation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.08266v2-abstract-full').style.display = 'none'; document.getElementById('2301.08266v2-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Belle II Preprint 2022-009 KEK Preprint 2022-45 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 131, 051804 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.04779">arXiv:2301.04779</a> <span> [<a href="https://arxiv.org/pdf/2301.04779">pdf</a>, <a href="https://arxiv.org/format/2301.04779">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"> Direction-sensitive dark matter search with three-dimensional vector-type tracking in NEWAGE </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Shimada%2C+T">Takuya Shimada</a>, <a href="/search/hep-ex?searchtype=author&query=Higashino%2C+S">Satoshi Higashino</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+T">Tomonori Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+K">Kiseki Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Yakabe%2C+R">Ryota Yakabe</a>, <a href="/search/hep-ex?searchtype=author&query=Hashimoto%2C+T">Takashi Hashimoto</a>, <a href="/search/hep-ex?searchtype=author&query=Ishiura%2C+H">Hirohisa Ishiura</a>, <a href="/search/hep-ex?searchtype=author&query=Nakamura%2C+T">Takuma Nakamura</a>, <a href="/search/hep-ex?searchtype=author&query=Nakazawa%2C+M">Miki Nakazawa</a>, <a href="/search/hep-ex?searchtype=author&query=Kubota%2C+R">Ryo Kubota</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+A">Ayaka Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Ito%2C+H">Hiroshi Ito</a>, <a href="/search/hep-ex?searchtype=author&query=Ichimura%2C+K">Koichi Ichimura</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">Ko Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Kobayashi%2C+K">Kazuyoshi Kobayashi</a>, <a href="/search/hep-ex?searchtype=author&query=Tanimori%2C+T">Toru Tanimori</a>, <a href="/search/hep-ex?searchtype=author&query=Kubo%2C+H">Hidetoshi Kubo</a>, <a href="/search/hep-ex?searchtype=author&query=Takada%2C+A">Atsushi Takada</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">Hiroyuki Sekiya</a>, <a href="/search/hep-ex?searchtype=author&query=Takeda%2C+A">Atsushi Takeda</a>, <a href="/search/hep-ex?searchtype=author&query=Miuchi%2C+K">Kentaro Miuchi</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="2301.04779v4-abstract-short" style="display: inline;"> NEWAGE is a direction-sensitive dark matter search experiment with a three-dimensional tracking detector based on a gaseous micro time projection chamber. A direction-sensitive dark matter search was carried out at Kamioka Observatory with a total live time of 318.0 days resulting in an exposure of 3.18 kg$\cdot$days. A new gamma-ray rejection and a head-tail determination analysis were implemente… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.04779v4-abstract-full').style.display = 'inline'; document.getElementById('2301.04779v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.04779v4-abstract-full" style="display: none;"> NEWAGE is a direction-sensitive dark matter search experiment with a three-dimensional tracking detector based on a gaseous micro time projection chamber. A direction-sensitive dark matter search was carried out at Kamioka Observatory with a total live time of 318.0 days resulting in an exposure of 3.18 kg$\cdot$days. A new gamma-ray rejection and a head-tail determination analysis were implemented for this work. No significant non-isotropic signal from the directional analysis was found and a 90% confidence level upper limit on spin-dependent WIMP-proton cross section of 25.7 pb for WIMP mass of 150 GeV/c2 was derived. This upper limit is the most stringent in the direction-sensitive dark matter searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.04779v4-abstract-full').style.display = 'none'; document.getElementById('2301.04779v4-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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 PTEP</span> </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/2212.10801">arXiv:2212.10801</a> <span> [<a href="https://arxiv.org/pdf/2212.10801">pdf</a>, <a href="https://arxiv.org/format/2212.10801">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 cosmogenic neutron yield in Super-Kamiokande with gadolinium loaded water </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+S">Super-Kamiokande Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Shinoki%2C+M">M. Shinoki</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Hayato%2C+Y">Y. Hayato</a>, <a href="/search/hep-ex?searchtype=author&query=Hiraide%2C+K">K. Hiraide</a>, <a href="/search/hep-ex?searchtype=author&query=Hosokawa%2C+K">K. Hosokawa</a>, <a href="/search/hep-ex?searchtype=author&query=Ieki%2C+K">K. Ieki</a>, <a href="/search/hep-ex?searchtype=author&query=Ikeda%2C+M">M. Ikeda</a>, <a href="/search/hep-ex?searchtype=author&query=Kameda%2C+J">J. Kameda</a>, <a href="/search/hep-ex?searchtype=author&query=Kanemura%2C+Y">Y. Kanemura</a>, <a href="/search/hep-ex?searchtype=author&query=Kaneshima%2C+R">R. Kaneshima</a>, <a href="/search/hep-ex?searchtype=author&query=Kashiwagi%2C+Y">Y. Kashiwagi</a>, <a href="/search/hep-ex?searchtype=author&query=Kataoka%2C+Y">Y. Kataoka</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+S">S. Miki</a>, <a href="/search/hep-ex?searchtype=author&query=Mine%2C+S">S. Mine</a>, <a href="/search/hep-ex?searchtype=author&query=Miura%2C+M">M. Miura</a>, <a href="/search/hep-ex?searchtype=author&query=Moriyama%2C+S">S. Moriyama</a>, <a href="/search/hep-ex?searchtype=author&query=Nakano%2C+Y">Y. Nakano</a>, <a href="/search/hep-ex?searchtype=author&query=Nakahata%2C+M">M. Nakahata</a>, <a href="/search/hep-ex?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/hep-ex?searchtype=author&query=Noguchi%2C+Y">Y. Noguchi</a>, <a href="/search/hep-ex?searchtype=author&query=Okamoto%2C+K">K. Okamoto</a>, <a href="/search/hep-ex?searchtype=author&query=Sato%2C+K">K. Sato</a>, <a href="/search/hep-ex?searchtype=author&query=Sekiya%2C+H">H. Sekiya</a> , et al. (217 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="2212.10801v3-abstract-short" style="display: inline;"> Cosmic-ray muons that enter the Super-Kamiokande detector cause hadronic showers due to spallation in water, producing neutrons and radioactive isotopes. Those are a major background source for studies of MeV-scale neutrinos and searches for rare events. Since 2020, gadolinium was introduced in the ultra-pure water in the Super-Kamiokande detector to improve the detection efficiency of neutrons. I… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.10801v3-abstract-full').style.display = 'inline'; document.getElementById('2212.10801v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.10801v3-abstract-full" style="display: none;"> Cosmic-ray muons that enter the Super-Kamiokande detector cause hadronic showers due to spallation in water, producing neutrons and radioactive isotopes. Those are a major background source for studies of MeV-scale neutrinos and searches for rare events. Since 2020, gadolinium was introduced in the ultra-pure water in the Super-Kamiokande detector to improve the detection efficiency of neutrons. In this study, the cosmogenic neutron yield was measured using data acquired during the period after the gadolinium loading. The yield was found to be $(2.76 \pm 0.02\,\mathrm{(stat.) \pm 0.19\,\mathrm{(syst.)}}) \times 10^{-4}\,渭^{-1} \mathrm{g^{-1} cm^{2}}$ at 259 GeV of average muon energy at the Super-Kamiokande detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.10801v3-abstract-full').style.display = 'none'; document.getElementById('2212.10801v3-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 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 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">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 10 figures, 3 tables</span> </p> </li> </ol> <nav class="pagination is-small 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