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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.15401">arXiv:2406.15401</a> <span> [<a href="https://arxiv.org/pdf/2406.15401">pdf</a>, <a href="https://arxiv.org/ps/2406.15401">ps</a>, <a href="https://arxiv.org/format/2406.15401">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Circular polarization measurement for individual gamma rays in capture reactions with intense pulsed neutrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Endo%2C+S">S. Endo</a>, <a href="/search/physics?searchtype=author&query=Abe%2C+R">R. Abe</a>, <a href="/search/physics?searchtype=author&query=Fujioka%2C+H">H. Fujioka</a>, <a href="/search/physics?searchtype=author&query=Ino%2C+T">T. Ino</a>, <a href="/search/physics?searchtype=author&query=Iwamoto%2C+O">O. Iwamoto</a>, <a href="/search/physics?searchtype=author&query=Iwamoto%2C+N">N. Iwamoto</a>, <a href="/search/physics?searchtype=author&query=Kawamura%2C+S">S. Kawamura</a>, <a href="/search/physics?searchtype=author&query=Kimura%2C+A">A. Kimura</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">M. Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Kobayashi%2C+R">R. Kobayashi</a>, <a href="/search/physics?searchtype=author&query=Nakamura%2C+S">S. Nakamura</a>, <a href="/search/physics?searchtype=author&query=Okudaira%2C+T+O+T">T. Oku T. Okudaira</a>, <a href="/search/physics?searchtype=author&query=Okuizumi%2C+M">M. Okuizumi</a>, <a href="/search/physics?searchtype=author&query=Omer%2C+M">M. Omer</a>, <a href="/search/physics?searchtype=author&query=Rovira%2C+G">G. Rovira</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Shimizu%2C+H+M">H. M. Shimizu</a>, <a href="/search/physics?searchtype=author&query=Shizuma%2C+T">T. Shizuma</a>, <a href="/search/physics?searchtype=author&query=Taira%2C+Y">Y. Taira</a>, <a href="/search/physics?searchtype=author&query=Takada%2C+S">S. Takada</a>, <a href="/search/physics?searchtype=author&query=Takahashi%2C+S">S. Takahashi</a>, <a href="/search/physics?searchtype=author&query=Yoshikawa%2C+H">H. Yoshikawa</a>, <a href="/search/physics?searchtype=author&query=Yoshioka%2C+T">T. Yoshioka</a>, <a href="/search/physics?searchtype=author&query=Zen%2C+H">H. Zen</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="2406.15401v1-abstract-short" style="display: inline;"> Measurements of circular polarization of $纬$-ray emitted from neutron capture reactions provide valuable information for nuclear physics studies. The spin and parity of excited states can be determined by measuring the circular polarization from polarized neutron capture reactions. Furthermore, the $纬$-ray circular polarization in a neutron capture resonance is crucial for studying the enhancement… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15401v1-abstract-full').style.display = 'inline'; document.getElementById('2406.15401v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.15401v1-abstract-full" style="display: none;"> Measurements of circular polarization of $纬$-ray emitted from neutron capture reactions provide valuable information for nuclear physics studies. The spin and parity of excited states can be determined by measuring the circular polarization from polarized neutron capture reactions. Furthermore, the $纬$-ray circular polarization in a neutron capture resonance is crucial for studying the enhancement effect of parity nonconservation in compound nuclei. The $纬$-ray circular polarization can be measured using a polarimeter based on magnetic Compton scattering. A polarimeter was constructed, and its performance indicators were evaluated using a circularly polarized $纬$-ray beam. Furthermore, as a demonstration, the $纬$-ray circular polarization was measured in $^{32}$S($\vec{\textrm{n}}$,$纬$)$^{33}$S reactions with polarized neutrons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15401v1-abstract-full').style.display = 'none'; document.getElementById('2406.15401v1-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 May, 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">10pages, 13 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/2404.04153">arXiv:2404.04153</a> <span> [<a href="https://arxiv.org/pdf/2404.04153">pdf</a>, <a href="https://arxiv.org/format/2404.04153">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"> Evaluation of the performance of the event reconstruction algorithms in the JSNS$^2$ experiment using a $^{252}$Cf calibration source </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+Y">J. Y. Choi</a>, <a href="/search/physics?searchtype=author&query=Dodo%2C+T">T. Dodo</a>, <a href="/search/physics?searchtype=author&query=Goh%2C+J">J. Goh</a>, <a href="/search/physics?searchtype=author&query=Haga%2C+K">K. Haga</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hwang%2C+W">W. Hwang</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jung%2C+D+E">D. E. Jung</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+Y">J. Y. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+B">S. B Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+W">W. Kim</a>, <a href="/search/physics?searchtype=author&query=Kinoshita%2C+H">H. Kinoshita</a>, <a href="/search/physics?searchtype=author&query=Konno%2C+T">T. Konno</a>, <a href="/search/physics?searchtype=author&query=Lim%2C+I+T">I. T. Lim</a> , et al. (28 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="2404.04153v1-abstract-short" style="display: inline;"> JSNS$^2$ searches for short baseline neutrino oscillations with a baseline of 24~meters and a target of 17~tonnes of the Gd-loaded liquid scintillator. The correct algorithm on the event reconstruction of events, which determines the position and energy of neutrino interactions in the detector, are essential for the physics analysis of the data from the experiment. Therefore, the performance of th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04153v1-abstract-full').style.display = 'inline'; document.getElementById('2404.04153v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.04153v1-abstract-full" style="display: none;"> JSNS$^2$ searches for short baseline neutrino oscillations with a baseline of 24~meters and a target of 17~tonnes of the Gd-loaded liquid scintillator. The correct algorithm on the event reconstruction of events, which determines the position and energy of neutrino interactions in the detector, are essential for the physics analysis of the data from the experiment. Therefore, the performance of the event reconstruction is carefully checked with calibrations using $^{252}$Cf source. This manuscript describes the methodology and the performance of the event reconstruction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04153v1-abstract-full').style.display = 'none'; document.getElementById('2404.04153v1-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 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.03679">arXiv:2404.03679</a> <span> [<a href="https://arxiv.org/pdf/2404.03679">pdf</a>, <a href="https://arxiv.org/format/2404.03679">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"> Pulse Shape Discrimination in JSNS$^2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dodo%2C+T">T. Dodo</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+Y">J. Y. Choi</a>, <a href="/search/physics?searchtype=author&query=Goh%2C+J">J. Goh</a>, <a href="/search/physics?searchtype=author&query=Haga%2C+K">K. Haga</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hwang%2C+W">W. Hwang</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jung%2C+D+E">D. E. Jung</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+Y">J. Y. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+B">S. B. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+W">W. Kim</a>, <a href="/search/physics?searchtype=author&query=Kinoshita%2C+H">H. Kinoshita</a>, <a href="/search/physics?searchtype=author&query=Konno%2C+T">T. Konno</a>, <a href="/search/physics?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a>, <a href="/search/physics?searchtype=author&query=Lim%2C+I+T">I. T. Lim</a> , et al. (29 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.03679v1-abstract-short" style="display: inline;"> JSNS$^2$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that is searching for sterile neutrinos via the observation of $\bar谓_渭 \rightarrow \bar谓_e$ appearance oscillations using neutrinos with muon decay-at-rest. For this search, rejecting cosmic-ray-induced neutron events by Pulse Shape Discrimination (PSD) is essential because the JSNS$^2$ detector is loca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.03679v1-abstract-full').style.display = 'inline'; document.getElementById('2404.03679v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.03679v1-abstract-full" style="display: none;"> JSNS$^2$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that is searching for sterile neutrinos via the observation of $\bar谓_渭 \rightarrow \bar谓_e$ appearance oscillations using neutrinos with muon decay-at-rest. For this search, rejecting cosmic-ray-induced neutron events by Pulse Shape Discrimination (PSD) is essential because the JSNS$^2$ detector is located above ground, on the third floor of the building. We have achieved 95$\%$ rejection of neutron events while keeping 90$\%$ of signal, electron-like events using a data driven likelihood method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.03679v1-abstract-full').style.display = 'none'; document.getElementById('2404.03679v1-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 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">arXiv admin note: text overlap with arXiv:2111.07482, arXiv:2308.02722</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.13941">arXiv:2309.13941</a> <span>  </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="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> </div> </div> <p class="title is-5 mathjax"> Radiopurity of NaI(Tl) crystals for PICOLON dark matter experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kotera%2C+K">K. Kotera</a>, <a href="/search/physics?searchtype=author&query=Chernyak%2C+D">D. Chernyak</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+H">H. Ito</a>, <a href="/search/physics?searchtype=author&query=Kishimoto%2C+T">T. Kishimoto</a>, <a href="/search/physics?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/physics?searchtype=author&query=Nakamura%2C+K">K. Nakamura</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Takemoto%2C+Y">Y. Takemoto</a>, <a href="/search/physics?searchtype=author&query=Umehara%2C+S">S. Umehara</a>, <a href="/search/physics?searchtype=author&query=Urano%2C+Y">Y. Urano</a>, <a href="/search/physics?searchtype=author&query=Yasuda%2C+K">K. Yasuda</a>, <a href="/search/physics?searchtype=author&query=Yoshida%2C+S">S. Yoshida</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="2309.13941v2-abstract-short" style="display: inline;"> The dark matter observation claim by the DAMA/LIBRA collaboration has been a long-standing puzzle within the particle physics community. Efforts of other research groups to verify the claim have been insufficient by significant radioactivity of present NaI(Tl) crystals. PICOLON (Pure Inorganic Crystal Observatory for LOw-energy Neut(ra)lino) experiment conducts independent search for Weakly Intera… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.13941v2-abstract-full').style.display = 'inline'; document.getElementById('2309.13941v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.13941v2-abstract-full" style="display: none;"> The dark matter observation claim by the DAMA/LIBRA collaboration has been a long-standing puzzle within the particle physics community. Efforts of other research groups to verify the claim have been insufficient by significant radioactivity of present NaI(Tl) crystals. PICOLON (Pure Inorganic Crystal Observatory for LOw-energy Neut(ra)lino) experiment conducts independent search for Weakly Interacting Massive Particles (WIMPs) using NaI(Tl) crystals. Our NaI(Tl) crystal manufactured in 2020 (Ingot #85) reached the same purity level as DAMA/LIBRA crystals. In this report, we describe the radiopurity of the new Ingot #94 crystal produced using the same purification technique as Ingot #85. The $伪$-ray events were selected by pulse-shape discrimination method. The impurities in the Ingot #94, $^{232}$Th, $^{226}$Ra and $^{210}$Po radioactivity were $4.6\pm 1.2~\mathrm{渭Bq/kg}$, $7.9\pm 4.4~\mathrm{渭Bq/kg}$, and $19\pm 6~\mathrm{渭Bq/kg}$, which are equivalent to those of the DAMA/LIBRA crystals. The background rate in the energy region of 2-6 keV , was 2-5 events/d/kg/keV without applying a veto trigger. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.13941v2-abstract-full').style.display = 'none'; document.getElementById('2309.13941v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">We have found duplicate contents in Fig.6 to Fig.8 that overlap with the KEK proceedings(page. 154-155 in https://lib-extopc.kek.jp/preprints/PDF/2023/2325/2325001.pdf), so the data analysis needs to be redone. In addition, we are withdrawing this paper because removing these contents would significantly reduce the quality of the paper</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.01887">arXiv:2309.01887</a> <span> [<a href="https://arxiv.org/pdf/2309.01887">pdf</a>, <a href="https://arxiv.org/format/2309.01887">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/10.1088/1748-0221/18/12/T12001">10.1088/1748-0221/18/12/T12001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The acrylic vessel for JSNS$^{2}$-II neutrino target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shin%2C+C+D">C. D. Shin</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+Y">J. Y. Choi</a>, <a href="/search/physics?searchtype=author&query=Dodo%2C+T">T. Dodo</a>, <a href="/search/physics?searchtype=author&query=Goh%2C+J">J. Goh</a>, <a href="/search/physics?searchtype=author&query=Haga%2C+K">K. Haga</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Hwang%2C+W">W. Hwang</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+H">H. Jeon</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+S">S. Jeon</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jung%2C+D+E">D. E. Jung</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+Y">J. Y. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+B">S. B. Kim</a> , et al. (35 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2309.01887v2-abstract-short" style="display: inline;"> The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment designed for the search for sterile neutrinos. The experiment is currently at the stage of the second phase named JSNS$^{2}$-II with two detectors at near and far locations from the neutrino source. One of the key components of the experiment is an acrylic vessel, that is used for the target volume… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.01887v2-abstract-full').style.display = 'inline'; document.getElementById('2309.01887v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.01887v2-abstract-full" style="display: none;"> The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment designed for the search for sterile neutrinos. The experiment is currently at the stage of the second phase named JSNS$^{2}$-II with two detectors at near and far locations from the neutrino source. One of the key components of the experiment is an acrylic vessel, that is used for the target volume for the detection of the anti-neutrinos. The specifications, design, and measured properties of the acrylic vessel are described. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.01887v2-abstract-full').style.display = 'none'; document.getElementById('2309.01887v2-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 4 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2023 JINST 18 T12001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.02722">arXiv:2308.02722</a> <span> [<a href="https://arxiv.org/pdf/2308.02722">pdf</a>, <a href="https://arxiv.org/format/2308.02722">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/10.1140/epjc/s10052-024-12778-7">10.1140/epjc/s10052-024-12778-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study on the accidental background of the JSNS$^2$ experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+Y">J. Y. Choi</a>, <a href="/search/physics?searchtype=author&query=Dodo%2C+T">T. Dodo</a>, <a href="/search/physics?searchtype=author&query=Goh%2C+J">J. Goh</a>, <a href="/search/physics?searchtype=author&query=Haga%2C+K">K. Haga</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Hwang%2C+W">W. Hwang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+H">H. Jeon</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+S">S. Jeon</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jung%2C+D+E">D. E. Jung</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+Y">J. Y. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+B">S. B. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+W">W. Kim</a> , et al. (33 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="2308.02722v2-abstract-short" style="display: inline;"> JSNS$^2$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment which searches for sterile neutrinos via the observation of $\bar谓_渭 \to \bar谓_{e}$ appearance oscillations using muon decay-at-rest neutrinos. The data taking of JSNS$^2$ have been performed from 2021. In this manuscript, a study of the accidental background is presented. The rate of the accidental back… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.02722v2-abstract-full').style.display = 'inline'; document.getElementById('2308.02722v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.02722v2-abstract-full" style="display: none;"> JSNS$^2$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment which searches for sterile neutrinos via the observation of $\bar谓_渭 \to \bar谓_{e}$ appearance oscillations using muon decay-at-rest neutrinos. The data taking of JSNS$^2$ have been performed from 2021. In this manuscript, a study of the accidental background is presented. The rate of the accidental background is (9.29$\pm 0.39) \times 10^{-8}$ / spill with 0.75 MW beam power and comparable to the number of searching signals. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.02722v2-abstract-full').style.display = 'none'; document.getElementById('2308.02722v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 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">Comments:</span> <span class="has-text-grey-dark mathjax">arXiv admin note: substantial text overlap with arXiv:2111.07482</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 84, 409 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.10116">arXiv:2112.10116</a> <span> [<a href="https://arxiv.org/pdf/2112.10116">pdf</a>, <a href="https://arxiv.org/format/2112.10116">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="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/10.1088/1742-6596/2156/1/012045">10.1088/1742-6596/2156/1/012045 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> PICOLON dark matter search project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Chernyak%2C+D">D. Chernyak</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/physics?searchtype=author&query=Ishiura%2C+H">H. Ishiura</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+H">H. Ito</a>, <a href="/search/physics?searchtype=author&query=Kishimoto%2C+T">T. Kishimoto</a>, <a href="/search/physics?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/physics?searchtype=author&query=Kotera%2C+K">K. Kotera</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/physics?searchtype=author&query=Nakamura%2C+K">K. Nakamura</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Takemoto%2C+Y">Y. Takemoto</a>, <a href="/search/physics?searchtype=author&query=Umehara%2C+S">S. Umehara</a>, <a href="/search/physics?searchtype=author&query=Urano%2C+Y">Y. Urano</a>, <a href="/search/physics?searchtype=author&query=Yamamoto%2C+Y">Y. Yamamoto</a>, <a href="/search/physics?searchtype=author&query=Yasuda%2C+K">K. Yasuda</a>, <a href="/search/physics?searchtype=author&query=Yoshida%2C+S">S. Yoshida</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="2112.10116v1-abstract-short" style="display: inline;"> PICOLON (Pure Inorganic Crystal Observatory for LOw-energy Neutr(al)ino) aims to search for cosmic dark matter by high purity NaI(Tl) scintillator. We developed extremely pure NaI(Tl) crystal by hybrid purification method. The recent result of $^{210}$Pb in our NaI(Tl) is less than 5.7 $渭$Bq/kg. We will report the test experiment in the low-background measurement at Kamioka Underground Laboratory.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.10116v1-abstract-full').style.display = 'inline'; document.getElementById('2112.10116v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.10116v1-abstract-full" style="display: none;"> PICOLON (Pure Inorganic Crystal Observatory for LOw-energy Neutr(al)ino) aims to search for cosmic dark matter by high purity NaI(Tl) scintillator. We developed extremely pure NaI(Tl) crystal by hybrid purification method. The recent result of $^{210}$Pb in our NaI(Tl) is less than 5.7 $渭$Bq/kg. We will report the test experiment in the low-background measurement at Kamioka Underground Laboratory. The sensitivity for annual modulating signals and finding dark matter particles will be discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.10116v1-abstract-full').style.display = 'none'; document.getElementById('2112.10116v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To be published in the Proceedings of TAUP2021. (Journal of Physics: Conference Series (JPCS),)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2106.15235">arXiv:2106.15235</a> <span> [<a href="https://arxiv.org/pdf/2106.15235">pdf</a>, <a href="https://arxiv.org/format/2106.15235">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="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> </div> </div> <p class="title is-5 mathjax"> Dark matter search with high purity NaI(Tl) scintillator </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Kanemitsu%2C+Y">Y. Kanemitsu</a>, <a href="/search/physics?searchtype=author&query=Kotera%2C+K">K. Kotera</a>, <a href="/search/physics?searchtype=author&query=Chernyak%2C+D">D. Chernyak</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/physics?searchtype=author&query=Ishiura%2C+H">H. Ishiura</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+H">H. Ito</a>, <a href="/search/physics?searchtype=author&query=Kisimoto%2C+T">T. Kisimoto</a>, <a href="/search/physics?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/physics?searchtype=author&query=Nakamura%2C+K">K. Nakamura</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Takemoto%2C+Y">Y. Takemoto</a>, <a href="/search/physics?searchtype=author&query=Umehara%2C+S">S. Umehara</a>, <a href="/search/physics?searchtype=author&query=Urano%2C+Y">Y. Urano</a>, <a href="/search/physics?searchtype=author&query=Yasuda%2C+K">K. Yasuda</a>, <a href="/search/physics?searchtype=author&query=Yoshida%2C+S">S. Yoshida</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="2106.15235v1-abstract-short" style="display: inline;"> A dark matter search project needs and extremely low background radiation detector since the expected event rate of dark matter is less than a few events in one year in one tonne of the detector mass. The authors developed a highly radiopure NaI(Tl) crystal to search for dark matter. The best combination of the purification methods was developed, resulting $^{\mathrm{nat}}$K and $^{210}$Pb were le… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.15235v1-abstract-full').style.display = 'inline'; document.getElementById('2106.15235v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2106.15235v1-abstract-full" style="display: none;"> A dark matter search project needs and extremely low background radiation detector since the expected event rate of dark matter is less than a few events in one year in one tonne of the detector mass. The authors developed a highly radiopure NaI(Tl) crystal to search for dark matter. The best combination of the purification methods was developed, resulting $^{\mathrm{nat}}$K and $^{210}$Pb were less than 20 ppb and 5.7 $渭$Bq/kg, respectively. The authors will construct a large volume detector system with high-purity NaI(Tl) crystals. The design and the performance of the prototype detector module will be reported in this article. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2106.15235v1-abstract-full').style.display = 'none'; document.getElementById('2106.15235v1-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 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 7 figures, RADIATION DETECTORS AND THEIR USES Proceedings of the 35th Workshop on Radiation Detectors and Their Uses in KEK</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.13169">arXiv:2104.13169</a> <span> [<a href="https://arxiv.org/pdf/2104.13169">pdf</a>, <a href="https://arxiv.org/format/2104.13169">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.2021.165742">10.1016/j.nima.2021.165742 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The JSNS^2 Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Botran%2C+M">M. Botran</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+W">J. W. Choi</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Dodo%2C+T">T. Dodo</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Goh%2C+J">J. Goh</a>, <a href="/search/physics?searchtype=author&query=Haga%2C+K">K. Haga</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+Y">Y. Hino</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+M+C">M. C. Jang</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+H">H. Jeon</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+S">S. Jeon</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jordan%2C+J+R">J. R. Jordan</a>, <a href="/search/physics?searchtype=author&query=Jung%2C+D+E">D. E. Jung</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a> , et al. (41 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.13169v2-abstract-short" style="display: inline;"> The JSNS^2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for oscillations involving a sterile neutrino in the eV^2 mass-splitting range. The experiment will search for the appearance of electron antineutrinos oscillated from muon antineutrinos. The electron antineutrinos are detected via the inverse beta decay process using a liquid scintillator det… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.13169v2-abstract-full').style.display = 'inline'; document.getElementById('2104.13169v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.13169v2-abstract-full" style="display: none;"> The JSNS^2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for oscillations involving a sterile neutrino in the eV^2 mass-splitting range. The experiment will search for the appearance of electron antineutrinos oscillated from muon antineutrinos. The electron antineutrinos are detected via the inverse beta decay process using a liquid scintillator detector. A 1MW beam of 3 GeV protons incident on a spallation neutron target produces an intense and pulsed neutrino source from pion, muon, and kaon decay at rest. The JSNS^2 detector is located 24 m away from the neutrino source and began operation from June 2020. The detector contains 17 tonnes of gadolinium (Gd) loaded liquid scintillator (LS) in an acrylic vessel, as a neutrino target. It is surrounded by 31 tonnes of unloaded LS in a stainless steel tank. Optical photons produced in LS are viewed by 120 R7081 Hamamatsu 10-inch Photomultiplier Tubes (PMTs). In this paper, we describe the JSNS^2 detector design, construction, and operation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.13169v2-abstract-full').style.display = 'none'; document.getElementById('2104.13169v2-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 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">41 pages, 29 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/2101.00759">arXiv:2101.00759</a> <span> [<a href="https://arxiv.org/pdf/2101.00759">pdf</a>, <a href="https://arxiv.org/format/2101.00759">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="Instrumentation and Methods for Astrophysics">astro-ph.IM</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/ptab020">10.1093/ptep/ptab020 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Development of highly radiopure NaI(Tl) scintillator for PICOLON dark matter search project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Kanemitsu%2C+Y">Y. Kanemitsu</a>, <a href="/search/physics?searchtype=author&query=Hirata%2C+S">S. Hirata</a>, <a href="/search/physics?searchtype=author&query=Chernyak%2C+D">D. Chernyak</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/physics?searchtype=author&query=Ishiura%2C+H">H. Ishiura</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+H">H. Ito</a>, <a href="/search/physics?searchtype=author&query=Kisimoto%2C+T">T. Kisimoto</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/physics?searchtype=author&query=Takemoto%2C+Y">Y. Takemoto</a>, <a href="/search/physics?searchtype=author&query=Yasuda%2C+K">K. Yasuda</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Hata%2C+K">K. Hata</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+T">T. Iida</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/physics?searchtype=author&query=Koga%2C+M">M. Koga</a>, <a href="/search/physics?searchtype=author&query=Nakamura%2C+K">K. Nakamura</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Umehara%2C+S">S. Umehara</a>, <a href="/search/physics?searchtype=author&query=Yoshida%2C+S">S. Yoshida</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2101.00759v3-abstract-short" style="display: inline;"> The highly radiopure NaI(Tl) was developed to search for particle candidates of dark matter. The optimized methods were combined to reduce various radioactive impurities. The $^{40}$K was effectively reduced by the re-crystallization method. The progenies of the decay chains of uranium and thorium were reduced by appropriate resins. The concentration of natural potassium in NaI(Tl) crystal was red… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.00759v3-abstract-full').style.display = 'inline'; document.getElementById('2101.00759v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.00759v3-abstract-full" style="display: none;"> The highly radiopure NaI(Tl) was developed to search for particle candidates of dark matter. The optimized methods were combined to reduce various radioactive impurities. The $^{40}$K was effectively reduced by the re-crystallization method. The progenies of the decay chains of uranium and thorium were reduced by appropriate resins. The concentration of natural potassium in NaI(Tl) crystal was reduced down to 20 ppb. Concentrations of alpha-ray emitters were successfully reduced by appropriate selection of resin. The present concentration of thorium series and 226Ra were $1.2 \pm1.4$ $渭$Bq/kg and $13\pm4$ $渭$Bq/kg, respectively. No significant excess in the concentration of $^{210}$Pb was obtained, and the upper limit was 5.7 $渭$Bq/kg at 90% C. L. The achieved level of radiopurity of NaI(Tl) crystals makes construction of a dark matter detector possible. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.00759v3-abstract-full').style.display = 'none'; document.getElementById('2101.00759v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 6 figures, accepted to Progress of Theoretical and Experimental Physics</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 2021, Issue 4, April 2021, 043F01 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.00775">arXiv:2010.00775</a> <span> [<a href="https://arxiv.org/pdf/2010.00775">pdf</a>, <a href="https://arxiv.org/format/2010.00775">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/TNS.2020.3047615">10.1109/TNS.2020.3047615 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pulse Shape Discrimination of CsI(Tl) with a Photomultiplier Tube and MPPCs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Viet%2C+N+V+H">Nguyen V. H. Viet</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Takahisa%2C+K">K. Takahisa</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Khai%2C+B+T">B. T. Khai</a>, <a href="/search/physics?searchtype=author&query=Takaishi%2C+R">R. Takaishi</a>, <a href="/search/physics?searchtype=author&query=Miyamoto%2C+K">K. Miyamoto</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="2010.00775v1-abstract-short" style="display: inline;"> In this study, we evaluate and compare the pulse shape discrimination (PSD) performance of multipixel photon counters (MPPCs, also known as silicon photomultiphers - SiPMs) with that of a typical photomultiplier tube (PMT) when testing using CsI(Tl) scintillators. We use the charge comparison method, whereby we discriminate different types of particles by the ratio of charges integrated within two… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.00775v1-abstract-full').style.display = 'inline'; document.getElementById('2010.00775v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.00775v1-abstract-full" style="display: none;"> In this study, we evaluate and compare the pulse shape discrimination (PSD) performance of multipixel photon counters (MPPCs, also known as silicon photomultiphers - SiPMs) with that of a typical photomultiplier tube (PMT) when testing using CsI(Tl) scintillators. We use the charge comparison method, whereby we discriminate different types of particles by the ratio of charges integrated within two time-gates (the delayed part and the entire digitized waveform). For a satisfactory PSD performance, a setup should generate many photoelectrons (p.e.) and collect their charges efficiently. The PMT setup generates more p.e. than the MPPC setup does. With the same digitizer and the same long time-gate (the entire digitized waveform), the PMT setup is also better in charge collection. Therefore, the PMT setup demonstrates better PSD performance. We subsequently test the MPPC setup using a new data acquisition (DAQ) system. Using this new DAQ, the long time-gate is extended by nearly four times the length when using the previous digitizer. With this longer time-gate, we collect more p.e. at the tail part of the pulse and almost all the charges of the total collected p.e. Thus, the PSD performance of the MPPC setup is improved significantly. This study also provides an estimation of the short time-gate (the delayed part of the digitized waveform) that can give a satisfactory PSD performance without an extensive analysis to optimize this gate. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.00775v1-abstract-full').style.display = 'none'; document.getElementById('2010.00775v1-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 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.00670">arXiv:2006.00670</a> <span> [<a href="https://arxiv.org/pdf/2006.00670">pdf</a>, <a href="https://arxiv.org/format/2006.00670">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"> The JSNS$^{2}$ data acquisition system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Park%2C+J+S">J. S. Park</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Botran%2C+M">M. Botran</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Dodo%2C+T">T. Dodo</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Gwak%2C+P">P. Gwak</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+Y">Y. Hino</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+M">M. Jang</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+H">H. Jeon</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+S">S. Jeon</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jordan%2C+J+R">J. R. Jordan</a>, <a href="/search/physics?searchtype=author&query=Jung%2C+D+E">D. E. Jung</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+Y">J. Y. Kim</a> , et al. (36 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="2006.00670v1-abstract-short" style="display: inline;"> The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for neutrino oscillations over a 24 m short baseline at J-PARC. The JSNS$^{2}$ inner detector is filled with 17 tons of gadolinium(Gd)-loaded liquid scintillator (LS) with an additional 31 tons of unloaded LS in the intermediate $纬$-catcher and an optically separated outer veto volumes. A… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00670v1-abstract-full').style.display = 'inline'; document.getElementById('2006.00670v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.00670v1-abstract-full" style="display: none;"> The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for neutrino oscillations over a 24 m short baseline at J-PARC. The JSNS$^{2}$ inner detector is filled with 17 tons of gadolinium(Gd)-loaded liquid scintillator (LS) with an additional 31 tons of unloaded LS in the intermediate $纬$-catcher and an optically separated outer veto volumes. A total of 120 10-inch photomultiplier tubes observe the scintillating optical photons and each analog waveform is stored with the flash analog-to-digital converters. We present details of the data acquisition, processing, and data quality monitoring system. We also present two different trigger logics which are developed for the beam and self-trigger. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00670v1-abstract-full').style.display = 'none'; document.getElementById('2006.00670v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 8 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/2005.01599">arXiv:2005.01599</a> <span> [<a href="https://arxiv.org/pdf/2005.01599">pdf</a>, <a href="https://arxiv.org/format/2005.01599">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> </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/10.1088/1748-0221/15/07/T07003">10.1088/1748-0221/15/07/T07003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of PMTs for the JSNS2 experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Park%2C+J+S">J. S. Park</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a>, <a href="/search/physics?searchtype=author&query=Monjushiro%2C+S">S. Monjushiro</a>, <a href="/search/physics?searchtype=author&query=Nishikawa%2C+K">K. Nishikawa</a>, <a href="/search/physics?searchtype=author&query=Taira%2C+M">M. Taira</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+Y">J. Y. Kim</a>, <a href="/search/physics?searchtype=author&query=Lim%2C+I+T">I. T. Lim</a>, <a href="/search/physics?searchtype=author&query=Moon%2C+D+H">D. H. Moon</a>, <a href="/search/physics?searchtype=author&query=Seo%2C+J+H">J. H. Seo</a>, <a href="/search/physics?searchtype=author&query=Shin%2C+C+D">C. D. Shin</a>, <a href="/search/physics?searchtype=author&query=Zohaib%2C+A">A. Zohaib</a>, <a href="/search/physics?searchtype=author&query=Gwak%2C+P">P. Gwak</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+M">M. Jang</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Nakano%2C+T">T. Nakano</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Sugaya%2C+Y">Y. Sugaya</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Pac%2C+M+Y">M. Y. Pac</a> , et al. (36 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="2005.01599v2-abstract-short" style="display: inline;"> The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for neutrino oscillations over a 24\,m short baseline at J-PARC. The JSNS$^{2}$ inner detector is filled with 17 tons of gadolinium-loaded liquid scintillator (LS) and both the intermediate $纬$-catcher and the optically separated outer veto are filled with un-loaded LS. Optical photons fro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.01599v2-abstract-full').style.display = 'inline'; document.getElementById('2005.01599v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.01599v2-abstract-full" style="display: none;"> The JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment aims to search for neutrino oscillations over a 24\,m short baseline at J-PARC. The JSNS$^{2}$ inner detector is filled with 17 tons of gadolinium-loaded liquid scintillator (LS) and both the intermediate $纬$-catcher and the optically separated outer veto are filled with un-loaded LS. Optical photons from scintillation are observed by 120 Photomultiplier Tubes (PMTs). A total of 130 PMTs for the JSNS2 experiment were both donated by other experiments and purchased from Hamamatsu. Donated PMTs were purchased around 10 years ago, therefore JSNS$^{2}$ did pre-calibration of the PMTs including the purchased PMTs. 123 PMTs demonstrated acceptable performance for the JSNS$^{2}$ experiment, and 120 PMTs were installed in the detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.01599v2-abstract-full').style.display = 'none'; document.getElementById('2005.01599v2-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.01286">arXiv:2005.01286</a> <span> [<a href="https://arxiv.org/pdf/2005.01286">pdf</a>, <a href="https://arxiv.org/format/2005.01286">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> </div> </div> <p class="title is-5 mathjax"> Slow control and monitoring system at the JSNS$^{2}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Park%2C+J+S">J. S. Park</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Botran%2C+M">M. Botran</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+W">J. W. Choi</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Dodo%2C+T">T. Dodo</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Goh%2C+J">J. Goh</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+Y">Y. Hino</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+M+C">M. C. Jang</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+H">H. Jeon</a>, <a href="/search/physics?searchtype=author&query=Jeon%2C+S">S. Jeon</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jordan%2C+J+R">J. R. Jordan</a>, <a href="/search/physics?searchtype=author&query=Jung%2C+D+E">D. E Jung</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a> , et al. (37 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="2005.01286v4-abstract-short" style="display: inline;"> The JSNS$^2$ experiment is aimed to search for sterile neutrino oscillations using a neutrino beam from muon decays at rest. The JSNS$^2$ detector contains 17 tons of 0.1\% gadolinium (Gd) loaded liquid scintillator (LS) as a neutrino target. Detector construction was completed in the spring of 2020. A slow control and monitoring system (SCMS) was implemented for reliable control and quick monitor… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.01286v4-abstract-full').style.display = 'inline'; document.getElementById('2005.01286v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.01286v4-abstract-full" style="display: none;"> The JSNS$^2$ experiment is aimed to search for sterile neutrino oscillations using a neutrino beam from muon decays at rest. The JSNS$^2$ detector contains 17 tons of 0.1\% gadolinium (Gd) loaded liquid scintillator (LS) as a neutrino target. Detector construction was completed in the spring of 2020. A slow control and monitoring system (SCMS) was implemented for reliable control and quick monitoring of the detector operational status and environmental conditions. It issues an alarm if any of the monitored parameters exceed a preset acceptable range. The SCMS monitors the high voltage (HV) of the photomultiplier tubes (PMTs), the LS level in the detector, possible LS overflow and leakage, the temperature and air pressure in the detector, the humidity of the experimental hall, and the LS flow rate during filling and extraction. An initial 10 days of data-taking with a neutrino beam was done following a successful commissioning of the detector and SCMS in June 2020. In this paper, we present a description of the assembly and installation of the SCMS and its performance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.01286v4-abstract-full').style.display = 'none'; document.getElementById('2005.01286v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 11 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/2002.08655">arXiv:2002.08655</a> <span> [<a href="https://arxiv.org/pdf/2002.08655">pdf</a>, <a href="https://arxiv.org/format/2002.08655">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.101.064624">10.1103/PhysRevC.101.064624 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse asymmetry of $纬$ rays from neutron-induced compound states of ${}^{140}{\rm La}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Yamamoto%2C+T">T. Yamamoto</a>, <a href="/search/physics?searchtype=author&query=Okudaira%2C+T">T. Okudaira</a>, <a href="/search/physics?searchtype=author&query=Endo%2C+S">S. Endo</a>, <a href="/search/physics?searchtype=author&query=Fujioka%2C+H">H. Fujioka</a>, <a href="/search/physics?searchtype=author&query=Hirota%2C+K">K. Hirota</a>, <a href="/search/physics?searchtype=author&query=Ino%2C+T">T. Ino</a>, <a href="/search/physics?searchtype=author&query=Ishizaki%2C+K">K. Ishizaki</a>, <a href="/search/physics?searchtype=author&query=Kimura%2C+A">A. Kimura</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">M. Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Koga%2C+J">J. Koga</a>, <a href="/search/physics?searchtype=author&query=Makise%2C+S">S. Makise</a>, <a href="/search/physics?searchtype=author&query=Niinomi%2C+Y">Y. Niinomi</a>, <a href="/search/physics?searchtype=author&query=Oku%2C+T">T. Oku</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+K">K. Sakai</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Shimizu%2C+H+M">H. M. Shimizu</a>, <a href="/search/physics?searchtype=author&query=Takada%2C+S">S. Takada</a>, <a href="/search/physics?searchtype=author&query=Tani%2C+Y">Y. Tani</a>, <a href="/search/physics?searchtype=author&query=Yoshikawa%2C+H">H. Yoshikawa</a>, <a href="/search/physics?searchtype=author&query=Yoshioka%2C+T">T. Yoshioka</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="2002.08655v1-abstract-short" style="display: inline;"> A correlation term ${{ 蟽}_{n} }\cdot ({ k_{n}\times k_纬}) $ in the ${}^{139}{\rm La}(\vec{n},纬)$ reaction has been studied utilizing epithermal polarized neutrons and germanium detectors. The transverse asymmetry for single $纬$-ray transition was measured to be $0.60\pm0.19$ in the $p$-wave resonance. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.08655v1-abstract-full" style="display: none;"> A correlation term ${{ 蟽}_{n} }\cdot ({ k_{n}\times k_纬}) $ in the ${}^{139}{\rm La}(\vec{n},纬)$ reaction has been studied utilizing epithermal polarized neutrons and germanium detectors. The transverse asymmetry for single $纬$-ray transition was measured to be $0.60\pm0.19$ in the $p$-wave resonance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.08655v1-abstract-full').style.display = 'none'; document.getElementById('2002.08655v1-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 101, 064624 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.08166">arXiv:1908.08166</a> <span> [<a href="https://arxiv.org/pdf/1908.08166">pdf</a>, <a href="https://arxiv.org/format/1908.08166">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2020.163749">10.1016/j.nima.2020.163749 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nuclear Isotope Production by Ordinary Muon Capture Reaction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Hashim%2C+I+H">I. H. Hashim</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Othman%2C+F">F. Othman</a>, <a href="/search/physics?searchtype=author&query=Ibrahim%2C+F">F. Ibrahim</a>, <a href="/search/physics?searchtype=author&query=Soberi%2C+F">F. Soberi</a>, <a href="/search/physics?searchtype=author&query=Ghani%2C+N+N+A+M+A">N. N. A. M. A. Ghani</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+A">A. Sato</a>, <a href="/search/physics?searchtype=author&query=Ninomiya%2C+K">K. Ninomiya</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="1908.08166v3-abstract-short" style="display: inline;"> Muon capture isotope production (MuCIP) using negative ordinary muon capture reactions (OMC) is used to efficiently produce various kinds of nuclear isotopes for both fundamental and applied science studies. The large capture probability of muon into a nucleus, together with the high intensity muon beam, make it possible to produce nuclear isotopes in the order of 10^{9-10} per second depending on… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.08166v3-abstract-full').style.display = 'inline'; document.getElementById('1908.08166v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.08166v3-abstract-full" style="display: none;"> Muon capture isotope production (MuCIP) using negative ordinary muon capture reactions (OMC) is used to efficiently produce various kinds of nuclear isotopes for both fundamental and applied science studies. The large capture probability of muon into a nucleus, together with the high intensity muon beam, make it possible to produce nuclear isotopes in the order of 10^{9-10} per second depending on the muon beam intensity. Radioactive isotopes (RIs) produced by MuCIP are complementary to those produced by photon and neutron capture reactions and are used for various science and technology applications. MuCIP on ^{Nat}Mo by using the RCNP MuSIC \muon beam is presented to demonstrate the feasibility of MuCIP. Nuclear isotopes produced by MuCIP are evaluated by using a pre-equilibrium (PEQ) and equilibrium (EQ) proton neutron emission model. Radioactive $^{99}$Mo isotopes and the metastable ^{99m}Tc isotopes, which are used extensively in medical science, are produced by MuCIP on ^{Nat}Mo and ^{100}Mo. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.08166v3-abstract-full').style.display = 'none'; document.getElementById('1908.08166v3-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 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 5 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/1904.11893">arXiv:1904.11893</a> <span> [<a href="https://arxiv.org/pdf/1904.11893">pdf</a>, <a href="https://arxiv.org/ps/1904.11893">ps</a>, <a href="https://arxiv.org/format/1904.11893">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Improved determination of thermal cross section of 14N(n,p)14C for the neutron lifetime measurement </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kitahara%2C+R">R. Kitahara</a>, <a href="/search/physics?searchtype=author&query=Hirota%2C+K">K. Hirota</a>, <a href="/search/physics?searchtype=author&query=Ieki%2C+S">S. Ieki</a>, <a href="/search/physics?searchtype=author&query=Ino%2C+T">T. Ino</a>, <a href="/search/physics?searchtype=author&query=Iwashita%2C+Y">Y. Iwashita</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">M. Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Koga%2C+J">J. Koga</a>, <a href="/search/physics?searchtype=author&query=Mishima%2C+K">K. Mishima</a>, <a href="/search/physics?searchtype=author&query=Morishita%2C+A">A. Morishita</a>, <a href="/search/physics?searchtype=author&query=Nagakura%2C+N">N. Nagakura</a>, <a href="/search/physics?searchtype=author&query=Oide%2C+H">H. Oide</a>, <a href="/search/physics?searchtype=author&query=Otono%2C+H">H. Otono</a>, <a href="/search/physics?searchtype=author&query=Seki%2C+Y">Y. Seki</a>, <a href="/search/physics?searchtype=author&query=Sekiba%2C+D">D. Sekiba</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Shimizu%2C+H+M">H. M. Shimizu</a>, <a href="/search/physics?searchtype=author&query=Sumi%2C+N">N. Sumi</a>, <a href="/search/physics?searchtype=author&query=Sumino%2C+H">H. Sumino</a>, <a href="/search/physics?searchtype=author&query=Taketani%2C+K">K. Taketani</a>, <a href="/search/physics?searchtype=author&query=Tomita%2C+T">T. Tomita</a>, <a href="/search/physics?searchtype=author&query=Yamada%2C+T">T. Yamada</a>, <a href="/search/physics?searchtype=author&query=Yamashita%2C+S">S. Yamashita</a>, <a href="/search/physics?searchtype=author&query=Yokohashi%2C+M">M. Yokohashi</a>, <a href="/search/physics?searchtype=author&query=Yoshioka%2C+T">T. Yoshioka</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="1904.11893v4-abstract-short" style="display: inline;"> In a neutron lifetime measurement at the Japan Proton Accelerator Complex, the neutron lifetime is calculated by the neutron decay rate and the incident neutron flux. The flux is obtained due to counting the protons emitted from the neutron absorption reaction of ${}^{3}{\rm He}$ gas, which is diluted in a mixture of working gas in a detector. Hence, it is crucial to determine the amount of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.11893v4-abstract-full').style.display = 'inline'; document.getElementById('1904.11893v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.11893v4-abstract-full" style="display: none;"> In a neutron lifetime measurement at the Japan Proton Accelerator Complex, the neutron lifetime is calculated by the neutron decay rate and the incident neutron flux. The flux is obtained due to counting the protons emitted from the neutron absorption reaction of ${}^{3}{\rm He}$ gas, which is diluted in a mixture of working gas in a detector. Hence, it is crucial to determine the amount of ${}^{3}{\rm He}$ in the mixture. In order to improve the accuracy of the number density of the ${}^{3}{\rm He}$ nuclei, we suggested to use the ${}^{14}{\rm N}({\rm n},{\rm p}){}^{14}{\rm C}$ reaction as a reference because this reaction involves similar kinetic energy as the ${}^{3}{\rm He}({\rm n},{\rm p}){}^{3}{\rm H}$ reaction and a smaller reaction cross section to introduce reasonable large partial pressure. The uncertainty of the recommended value of the cross section, however, is not satisfied with our requirement. In this paper, we report the most accurate experimental value of the cross section of the ${}^{14}{\rm N}({\rm n},{\rm p}){}^{14}{\rm C}$ reaction at a neutron velocity of 2200 m/s, measured relative to the ${}^{3}{\rm He}({\rm n},{\rm p}){}^{3}{\rm H}$ reaction. The result was 1.868 $\pm$ 0.003 (stat.) $\pm$ 0.006 (sys.) b. Additionally, the cross section of the ${}^{17}{\rm O}({\rm n},{\rm 伪}){}^{14}{\rm C}$ reaction at the neutron velocity is also redetermined as 249 $\pm$ 6 mb. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.11893v4-abstract-full').style.display = 'none'; document.getElementById('1904.11893v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </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, 11 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KYUSHU-RCAPP-2018-04 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1902.08964">arXiv:1902.08964</a> <span> [<a href="https://arxiv.org/pdf/1902.08964">pdf</a>, <a href="https://arxiv.org/format/1902.08964">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Measurement of $纬$-ray production via the neutron-$^{16}$O reaction using a 77 MeV quasi-monoenergetic neutron beam </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ashida%2C+Y">Y. Ashida</a>, <a href="/search/physics?searchtype=author&query=Nagata%2C+H">H. Nagata</a>, <a href="/search/physics?searchtype=author&query=Mori%2C+M">M. Mori</a>, <a href="/search/physics?searchtype=author&query=Collazuol%2C+G">G. Collazuol</a>, <a href="/search/physics?searchtype=author&query=Fukuda%2C+D">D. Fukuda</a>, <a href="/search/physics?searchtype=author&query=Horai%2C+T">T. Horai</a>, <a href="/search/physics?searchtype=author&query=Iacob%2C+F">F. Iacob</a>, <a href="/search/physics?searchtype=author&query=Konaka%2C+A">A. Konaka</a>, <a href="/search/physics?searchtype=author&query=Koshio%2C+Y">Y. Koshio</a>, <a href="/search/physics?searchtype=author&query=Nakaya%2C+T">T. Nakaya</a>, <a href="/search/physics?searchtype=author&query=Nantais%2C+C">C. Nantais</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Suzuki%2C+A">A. Suzuki</a>, <a href="/search/physics?searchtype=author&query=Takeuchi%2C+Y">Y. Takeuchi</a>, <a href="/search/physics?searchtype=author&query=Tanaka%2C+H">H. Tanaka</a>, <a href="/search/physics?searchtype=author&query=Wendell%2C+R">R. Wendell</a>, <a href="/search/physics?searchtype=author&query=Yano%2C+T">T. Yano</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="1902.08964v3-abstract-short" style="display: inline;"> Understanding of $纬$-ray production via neutron interactions on oxygen is essential for the study of neutrino neutral-current quasielastic interactions in water Cherenkov detectors. A measurement of $纬$-ray production from such reactions was performed using a 77~MeV quasi-monoenergetic neutron beam. Several $纬$-ray peaks, which are expected to come from neutron-${\rm ^{16}O}$ reactions, are observ… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.08964v3-abstract-full').style.display = 'inline'; document.getElementById('1902.08964v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1902.08964v3-abstract-full" style="display: none;"> Understanding of $纬$-ray production via neutron interactions on oxygen is essential for the study of neutrino neutral-current quasielastic interactions in water Cherenkov detectors. A measurement of $纬$-ray production from such reactions was performed using a 77~MeV quasi-monoenergetic neutron beam. Several $纬$-ray peaks, which are expected to come from neutron-${\rm ^{16}O}$ reactions, are observed and production cross sections are measured for nine $纬$-ray components of energies between 2 and 8~MeV. These are the first measurements at this neutron energy using a nearly monoenergetic beam. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.08964v3-abstract-full').style.display = 'none'; document.getElementById('1902.08964v3-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 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 20 figures, 5 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1712.06351">arXiv:1712.06351</a> <span> [<a href="https://arxiv.org/pdf/1712.06351">pdf</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/10.7566/JPSCP.22.011033">10.7566/JPSCP.22.011033 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fundamental physics activities with pulsed neutron at J-PARC(BL05) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mishima%2C+K">Kenji Mishima</a>, <a href="/search/physics?searchtype=author&query=Awano%2C+S">Shogo Awano</a>, <a href="/search/physics?searchtype=author&query=Fuwa%2C+Y">Yasuhiro Fuwa</a>, <a href="/search/physics?searchtype=author&query=Goto%2C+F">Fumiya Goto</a>, <a href="/search/physics?searchtype=author&query=Haddock%2C+C+C">Christopher C. Haddock</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+M">Masahiro Hino</a>, <a href="/search/physics?searchtype=author&query=Hirose%2C+M">Masanori Hirose</a>, <a href="/search/physics?searchtype=author&query=Hirota%2C+K">Katsuya Hirota</a>, <a href="/search/physics?searchtype=author&query=Ieki%2C+S">Sei Ieki</a>, <a href="/search/physics?searchtype=author&query=Imajo%2C+S">Sohei Imajo</a>, <a href="/search/physics?searchtype=author&query=Ino%2C+T">Takashi Ino</a>, <a href="/search/physics?searchtype=author&query=Iwashita%2C+Y">Yoshihisa Iwashita</a>, <a href="/search/physics?searchtype=author&query=Katayama%2C+R">Ryo Katayama</a>, <a href="/search/physics?searchtype=author&query=Kawahara%2C+H">Hiroaki Kawahara</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">Masaaki Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Kitahara%2C+R">Ryunosuke Kitahara</a>, <a href="/search/physics?searchtype=author&query=Koga%2C+J">Jun Koga</a>, <a href="/search/physics?searchtype=author&query=Morishita%2C+A">Aya Morishita</a>, <a href="/search/physics?searchtype=author&query=Nagae%2C+T">Tomofumi Nagae</a>, <a href="/search/physics?searchtype=author&query=Nagakura%2C+N">Naoki Nagakura</a>, <a href="/search/physics?searchtype=author&query=Naganawa%2C+N">Naotaka Naganawa</a>, <a href="/search/physics?searchtype=author&query=Oi%2C+N">Noriko Oi</a>, <a href="/search/physics?searchtype=author&query=Oide%2C+H">Hideyuki Oide</a>, <a href="/search/physics?searchtype=author&query=Otono%2C+H">Hidetoshi Otono</a>, <a href="/search/physics?searchtype=author&query=Seki%2C+Y">Yoshichika Seki</a> , et al. (15 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1712.06351v2-abstract-short" style="display: inline;"> "Neutron Optics and Physics (NOP/ BL05)" at MLF in J-PARC is a beamline for studies of fundamental physics. The beamline is divided into three branches so that different experiments can be performed in parallel. These beam branches are being used to develop a variety of new projects. We are developing an experimental project to measure the neutron lifetime with total uncertainty of 1 s (0.1%). The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.06351v2-abstract-full').style.display = 'inline'; document.getElementById('1712.06351v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1712.06351v2-abstract-full" style="display: none;"> "Neutron Optics and Physics (NOP/ BL05)" at MLF in J-PARC is a beamline for studies of fundamental physics. The beamline is divided into three branches so that different experiments can be performed in parallel. These beam branches are being used to develop a variety of new projects. We are developing an experimental project to measure the neutron lifetime with total uncertainty of 1 s (0.1%). The neutron lifetime is an important parameter in elementary particle and astrophysics. Thus far, the neutron lifetime has been measured by several groups; however, different values are obtained from different measurement methods. This experiment is using a method with different sources of systematic uncertainty than measurements conducted to date. We are also developing a source of pulsed ultra-cold neutrons (UCNs) produced from a Doppler shifter are available at the unpolarized beam branch. We are developing a time focusing device for UCNs, a so called "rebuncher", which can increase UCN density from a pulsed UCN source. At the low divergence beam branch, an experiment to search an unknown intermediate force with nanometer range is performed by measuring the angular dependence of neutron scattering by noble gases. Finally the beamline is also used for the research and development of optical elements and detectors. For example, a position sensitive neutron detector that uses emulsion to achieve sub-micrometer resolution is currently under development. We have succeeded in detecting cold and ultra-cold neutrons using the emulsion detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.06351v2-abstract-full').style.display = 'none'; document.getElementById('1712.06351v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 5 figures, Proceedings of International Conference on Neutron Optics (NOP2017)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1712.02984">arXiv:1712.02984</a> <span> [<a href="https://arxiv.org/pdf/1712.02984">pdf</a>, <a href="https://arxiv.org/format/1712.02984">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="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/10.1103/PhysRevD.97.062002">10.1103/PhysRevD.97.062002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Search for deviations from the inverse square law of gravity at nm range using a pulsed neutron beam </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Haddock%2C+C+C">Christopher C. Haddock</a>, <a href="/search/physics?searchtype=author&query=Oi%2C+N">Noriko Oi</a>, <a href="/search/physics?searchtype=author&query=Hirota%2C+K">Katsuya Hirota</a>, <a href="/search/physics?searchtype=author&query=Ino%2C+T">Takashi Ino</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">Masaaki Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Matsumoto%2C+S">Satoru Matsumoto</a>, <a href="/search/physics?searchtype=author&query=Mishima%2C+K">Kenji Mishima</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">Tatsushi Shima</a>, <a href="/search/physics?searchtype=author&query=Shimizu%2C+H+M">Hirohiko M. Shimizu</a>, <a href="/search/physics?searchtype=author&query=Snow%2C+W+M">W. Michael Snow</a>, <a href="/search/physics?searchtype=author&query=Yoshioka%2C+T">Tamaki Yoshioka</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="1712.02984v2-abstract-short" style="display: inline;"> We describe an experimental search for deviations from the inverse square law of gravity at the nanometer length scale using neutron scattering from noble gases on a pulsed slow neutron beamline. By measuring the neutron momentum transfer ($q$) dependence of the differential cross section for xenon and helium and comparing to their well-known analytical forms, we place an upper bound on the streng… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.02984v2-abstract-full').style.display = 'inline'; document.getElementById('1712.02984v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1712.02984v2-abstract-full" style="display: none;"> We describe an experimental search for deviations from the inverse square law of gravity at the nanometer length scale using neutron scattering from noble gases on a pulsed slow neutron beamline. By measuring the neutron momentum transfer ($q$) dependence of the differential cross section for xenon and helium and comparing to their well-known analytical forms, we place an upper bound on the strength of a new interaction as a function of interaction length $位$ which improves upon previous results in the region $位< 0.1\,$nm, and remains competitive in the larger $位$ region. A pseudoexperimental simulation developed for this experiment and its role in the data analysis described. We conclude with plans for improving sensitivity in the larger $位$ region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.02984v2-abstract-full').style.display = 'none'; document.getElementById('1712.02984v2-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 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 8 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 97, 062002 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1705.08629">arXiv:1705.08629</a> <span> [<a href="https://arxiv.org/pdf/1705.08629">pdf</a>, <a href="https://arxiv.org/format/1705.08629">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"> Technical Design Report (TDR): Searching for a Sterile Neutrino at J-PARC MLF (E56, JSNS2) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Cheoun%2C+M+K">M. K. Cheoun</a>, <a href="/search/physics?searchtype=author&query=Choi%2C+J+H">J. H. Choi</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+Y">Y. Hino</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Iwai%2C+E">E. Iwai</a>, <a href="/search/physics?searchtype=author&query=Iwata%2C+S">S. Iwata</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+J+S">J. S. Jang</a>, <a href="/search/physics?searchtype=author&query=Jang%2C+H+I">H. I. Jang</a>, <a href="/search/physics?searchtype=author&query=Joo%2C+K+K">K. K. Joo</a>, <a href="/search/physics?searchtype=author&query=Jordan%2C+J">J. Jordan</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+S+K">S. K. Kang</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+E+J">E. J. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+Y">J. Y. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+B">S. B. Kim</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+W">W. Kim</a>, <a href="/search/physics?searchtype=author&query=Kuwata%2C+K">K. Kuwata</a>, <a href="/search/physics?searchtype=author&query=Kwon%2C+E">E. Kwon</a>, <a href="/search/physics?searchtype=author&query=Lim%2C+I+T">I. T. Lim</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a> , et al. (28 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="1705.08629v1-abstract-short" style="display: inline;"> In this document, the technical details of the JSNS$^2$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment are described. The search for sterile neutrinos is currently one of the hottest topics in neutrino physics. The JSNS$^2$ experiment aims to search for the existence of neutrino oscillations with $螖m^2$ near 1 eV$^2$ at the J-PARC Materials and Life Science Exper… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.08629v1-abstract-full').style.display = 'inline'; document.getElementById('1705.08629v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1705.08629v1-abstract-full" style="display: none;"> In this document, the technical details of the JSNS$^2$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) experiment are described. The search for sterile neutrinos is currently one of the hottest topics in neutrino physics. The JSNS$^2$ experiment aims to search for the existence of neutrino oscillations with $螖m^2$ near 1 eV$^2$ at the J-PARC Materials and Life Science Experimental Facility (MLF). A 1 MW beam of 3 GeV protons incident on a spallation neutron target produces an intense neutrino beam from muon decay at rest. Neutrinos come predominantly from $渭^+$ decay: $渭^{+} \to e^{+} + \bar谓_渭 + 谓_{e}$. The experiment will search for $\bar谓_渭$ to $\bar谓_{e}$ oscillations which are detected by the inverse beta decay interaction $\bar谓_{e} + p \to e^{+} + n$, followed by gammas from neutron capture on Gd. The detector has a fiducial volume of 17 tons and is located 24 meters away from the mercury target. JSNS$^2$ offers the ultimate direct test of the LSND anomaly. In addition to the sterile neutrino search, the physics program includes cross section measurements with neutrinos with a few 10's of MeV from muon decay at rest and with monochromatic 236 MeV neutrinos from kaon decay at rest. These cross sections are relevant for our understanding of supernova explosions and nuclear physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.08629v1-abstract-full').style.display = 'none'; document.getElementById('1705.08629v1-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 May, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2017. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1705.00110">arXiv:1705.00110</a> <span> [<a href="https://arxiv.org/pdf/1705.00110">pdf</a>, <a href="https://arxiv.org/format/1705.00110">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="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> </div> </div> <p class="title is-5 mathjax"> Search for cosmic dark matter by means of ultra high purity NaI(Tl) scintillator </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Chernyak%2C+D">D. Chernyak</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Hirata%2C+S">S. Hirata</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/physics?searchtype=author&query=Kanzaki%2C+G">G. Kanzaki</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Takemoto%2C+Y">Y. Takemoto</a>, <a href="/search/physics?searchtype=author&query=Teraoka%2C+Y">Y. Teraoka</a>, <a href="/search/physics?searchtype=author&query=Umehara%2C+S">S. Umehara</a>, <a href="/search/physics?searchtype=author&query=Yoshida%2C+S">S. Yoshida</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="1705.00110v1-abstract-short" style="display: inline;"> The dark matter search project by means of ultra high purity NaI(Tl) scintillator is now underdevelopment. An array of large volume NaI(Tl) detectors whose volume is 12.7 cm$蠁\times$12.7 cm is applied to search for dark matter signal. To remove radioactive impurities in NaI(Tl) crystal is one of the most important task to find small number of dark matter signals. We have developed high purity NaI(… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.00110v1-abstract-full').style.display = 'inline'; document.getElementById('1705.00110v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1705.00110v1-abstract-full" style="display: none;"> The dark matter search project by means of ultra high purity NaI(Tl) scintillator is now underdevelopment. An array of large volume NaI(Tl) detectors whose volume is 12.7 cm$蠁\times$12.7 cm is applied to search for dark matter signal. To remove radioactive impurities in NaI(Tl) crystal is one of the most important task to find small number of dark matter signals. We have developed high purity NaI(Tl) crystal which contains small amounts of radioactive impurities, $<4$ ppb of $^{nat}$K, 0.3 ppt of Th chain, 58 $渭$Bq/kg of $^{226}$Ra and 30 $渭$Bq/kg of $^{210}$Pb. Future prospects to search for dark matter by means of a large volume and high purity NaI(Tl) scintillator is discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.00110v1-abstract-full').style.display = 'none'; document.getElementById('1705.00110v1-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 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures. Proceedings of 31st Workshop on Radiation Detector and Their Uses, January 23-25, 2017. KEK, JAPAN</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1702.03099">arXiv:1702.03099</a> <span> [<a href="https://arxiv.org/pdf/1702.03099">pdf</a>, <a href="https://arxiv.org/format/1702.03099">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Precise neutron lifetime experiment using pulsed neutron beams at J-PARC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Nagakura%2C+N">Naoki Nagakura</a>, <a href="/search/physics?searchtype=author&query=Hirota%2C+K">Katsuya Hirota</a>, <a href="/search/physics?searchtype=author&query=Ieki%2C+S">Sei Ieki</a>, <a href="/search/physics?searchtype=author&query=Ino%2C+T">Takashi Ino</a>, <a href="/search/physics?searchtype=author&query=Iwashita%2C+Y">Yoshihisa Iwashita</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">Masaaki Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Kitahara%2C+R">Ryunosuke Kitahara</a>, <a href="/search/physics?searchtype=author&query=Mishima%2C+K">Kenji Mishima</a>, <a href="/search/physics?searchtype=author&query=Morishita%2C+A">Aya Morishita</a>, <a href="/search/physics?searchtype=author&query=Oide%2C+H">Hideyuki Oide</a>, <a href="/search/physics?searchtype=author&query=Otono%2C+H">Hidetoshi Otono</a>, <a href="/search/physics?searchtype=author&query=Sakakibara%2C+R">Risa Sakakibara</a>, <a href="/search/physics?searchtype=author&query=Seki%2C+Y">Yoshichika Seki</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">Tatsushi Shima</a>, <a href="/search/physics?searchtype=author&query=Shimizu%2C+H+M">Hirohiko M. Shimizu</a>, <a href="/search/physics?searchtype=author&query=Sugino%2C+T">Tomoaki Sugino</a>, <a href="/search/physics?searchtype=author&query=Sumi%2C+N">Naoyuki Sumi</a>, <a href="/search/physics?searchtype=author&query=Sumino%2C+H">Hiroshima Sumino</a>, <a href="/search/physics?searchtype=author&query=Taketani%2C+K">Kaoru Taketani</a>, <a href="/search/physics?searchtype=author&query=Tanaka%2C+G">Genki Tanaka</a>, <a href="/search/physics?searchtype=author&query=Tomita%2C+T">Tatsuhiko Tomita</a>, <a href="/search/physics?searchtype=author&query=Yamada%2C+T">Takahito Yamada</a>, <a href="/search/physics?searchtype=author&query=Yamashita%2C+S">Satoru Yamashita</a>, <a href="/search/physics?searchtype=author&query=Yokohashi%2C+M">Mami Yokohashi</a>, <a href="/search/physics?searchtype=author&query=Yoshioka%2C+T">Tamaki Yoshioka</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="1702.03099v1-abstract-short" style="display: inline;"> The neutron lifetime is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure the lifetime with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate the lifetime in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1702.03099v1-abstract-full').style.display = 'inline'; document.getElementById('1702.03099v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1702.03099v1-abstract-full" style="display: none;"> The neutron lifetime is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure the lifetime with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate the lifetime in 2016, which is expected to yield a statistical uncertainty of O(1)%. This paper presents the current analysis results and the future plans to achieve our goal precision. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1702.03099v1-abstract-full').style.display = 'none'; document.getElementById('1702.03099v1-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 February, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 7 figures, 2 tables, the 26th International Nuclear Physics Conference</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.08186">arXiv:1610.08186</a> <span> [<a href="https://arxiv.org/pdf/1610.08186">pdf</a>, <a href="https://arxiv.org/format/1610.08186">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"> Status Report (22th J-PARC PAC): Searching for a Sterile Neutrino at J-PARC MLF (E56, JSNS2) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Meigo%2C+S">S. Meigo</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+K">K. Sakai</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+S">S. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Suzuya%2C+K">K. Suzuya</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a>, <a href="/search/physics?searchtype=author&query=Monjushiro%2C+S">S. Monjushiro</a>, <a href="/search/physics?searchtype=author&query=Nishikawa%2C+K">K. Nishikawa</a>, <a href="/search/physics?searchtype=author&query=Taira%2C+M">M. Taira</a>, <a href="/search/physics?searchtype=author&query=Iwata%2C+S">S. Iwata</a>, <a href="/search/physics?searchtype=author&query=Kawasaki%2C+T">T. Kawasaki</a>, <a href="/search/physics?searchtype=author&query=Niiyama%2C+M">M. Niiyama</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Nakano%2C+T">T. Nakano</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Sugaya%2C+Y">Y. Sugaya</a>, <a href="/search/physics?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/physics?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Hino%2C+Y">Y. Hino</a>, <a href="/search/physics?searchtype=author&query=Suekane%2C+F">F. Suekane</a> , et al. (12 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="1610.08186v1-abstract-short" style="display: inline;"> The JSNS$^2$ (J-PARC E56) experiment aims to search for a sterile neutrino at the J-PARC Materials and Life Sciences Experimental Facility (MLF). After the submission of a proposal to the J-PARC PAC, Stage-1 approval was granted to the JSNS$^2$ experiment on April 2015.This approval followed a series of background measurements which were performed in 2014. Recently, funding (the grant-in-aid for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08186v1-abstract-full').style.display = 'inline'; document.getElementById('1610.08186v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.08186v1-abstract-full" style="display: none;"> The JSNS$^2$ (J-PARC E56) experiment aims to search for a sterile neutrino at the J-PARC Materials and Life Sciences Experimental Facility (MLF). After the submission of a proposal to the J-PARC PAC, Stage-1 approval was granted to the JSNS$^2$ experiment on April 2015.This approval followed a series of background measurements which were performed in 2014. Recently, funding (the grant-in-aid for scientific research (S)) in Japan for building one 25~ton fiducial volume detector module was approved for the experiment. Therefore, we aim to start the experiment with one detector in JFY2018-2019. We are now working to produce precise cost estimates and schedule for construction, noting that most of the detector components can be produced within one year from the date of order. This will be reported at the next PAC meeting. In parallel to the detector construction schedule, JSNS$^2$ will submit a Technical Design report (TDR) to obtain the Stage-2 approval from the J-PARC PAC.The recent progress of the R$\&$D efforts towards this TDR are shown in this report. In particular, the R$\&$D status of the liquid scintillator, cosmic ray veto system, and software are shown. We have performed a test-experiment using 1.6~L of liquid scintillator at the 3rd floor of the MLF building in order to determine the identities of non-neutrino background particles coming to this detector location during the proton bunch. This is the so-called "MLF 2015AU0001" experiment. We briefly show preliminary results from this test-experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08186v1-abstract-full').style.display = 'none'; document.getElementById('1610.08186v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.04999">arXiv:1605.04999</a> <span> [<a href="https://arxiv.org/pdf/1605.04999">pdf</a>, <a href="https://arxiv.org/format/1605.04999">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="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/10.7566/JPSCP.11.020003">10.7566/JPSCP.11.020003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High purity NaI(Tl) scintillator to search for dark matter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">Ken-Ichi Fushimi</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">Hiroyasu Ejiri</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">Ryuta Hazama</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">Haruo Ikeda</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">Kunio Inoue</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">Kyoshiro Imagawa</a>, <a href="/search/physics?searchtype=author&query=Kanzaki%2C+G">Gakuji Kanzaki</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">Alexandre Kozlov</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">Reiko Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">Tatsushi Shima</a>, <a href="/search/physics?searchtype=author&query=Takemoto%2C+Y">Yasuhiro Takemoto</a>, <a href="/search/physics?searchtype=author&query=Teraoka%2C+Y">Yuri Teraoka</a>, <a href="/search/physics?searchtype=author&query=Umehara%2C+S">Saori Umehara</a>, <a href="/search/physics?searchtype=author&query=Yoshida%2C+S">Sei Yoshida</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="1605.04999v1-abstract-short" style="display: inline;"> A high purity and large volume NaI(Tl) scintillator was developed to search for cosmic dark matter. The required densities of radioactive impurities (RIs) such as U-chain, Th-chain are less than a few ppt to establish high sensitivity to dark matter. The impurity of RIs were effectively reduced by selecting raw materials of crucible and by performing chemical reduction of lead ion in NaI raw powde… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.04999v1-abstract-full').style.display = 'inline'; document.getElementById('1605.04999v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.04999v1-abstract-full" style="display: none;"> A high purity and large volume NaI(Tl) scintillator was developed to search for cosmic dark matter. The required densities of radioactive impurities (RIs) such as U-chain, Th-chain are less than a few ppt to establish high sensitivity to dark matter. The impurity of RIs were effectively reduced by selecting raw materials of crucible and by performing chemical reduction of lead ion in NaI raw powder. The impurity of $^{226}$Ra was reduced less than 100 $渭$Bq/kg in NaI(Tl) crystal. It should be remarked that the impurity of $^{210}$Pb, which is difficult to reduce, is effectively reduced by chemical processing of NaI raw powder down to less than 30 $渭$Bq/kg. The expected sensitivity to cosmic dark matter by using 250 kg of the high purity and large volume NaI(Tl) scintillator (PICO-LON; Pure Inorganic Crystal Observatory for LOw-background Neutr(al)ino) is 7$\times$10$^{-45}$ cm$^{2}$ for 50 GeV$/c^{2}$ WIMPs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.04999v1-abstract-full').style.display = 'none'; document.getElementById('1605.04999v1-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, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 Figures, Proceedings of International Symposium on Radiation Detectors and Their Uses (ISRD2016). Talk given on 19th Jan. 2016 by K.Fushimi. To be published in Proceedings will be published as JPS conference proceedings (2016)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.01046">arXiv:1601.01046</a> <span> [<a href="https://arxiv.org/pdf/1601.01046">pdf</a>, <a href="https://arxiv.org/format/1601.01046">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"> Status Report for the 21th J-PARC PAC : Searching for a Sterile Neutrino at J-PARC MLF (J-PARC E56, JSNS2) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Meigo%2C+S">S. Meigo</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+K">K. Sakai</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+S">S. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Suzuya%2C+K">K. Suzuya</a>, <a href="/search/physics?searchtype=author&query=Iwai%2C+E">E. Iwai</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a>, <a href="/search/physics?searchtype=author&query=Monjushiro%2C+S">S. Monjushiro</a>, <a href="/search/physics?searchtype=author&query=Nishikawa%2C+K">K. Nishikawa</a>, <a href="/search/physics?searchtype=author&query=Taira%2C+M">M. Taira</a>, <a href="/search/physics?searchtype=author&query=Niiyama%2C+M">M. Niiyama</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Nakano%2C+T">T. Nakano</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/physics?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Suekane%2C+F">F. Suekane</a>, <a href="/search/physics?searchtype=author&query=Stancu%2C+I">I. Stancu</a>, <a href="/search/physics?searchtype=author&query=Yeh%2C+M">M. Yeh</a>, <a href="/search/physics?searchtype=author&query=Toki%2C+W">W. Toki</a> , et al. (7 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="1601.01046v1-abstract-short" style="display: inline;"> The JSNS2 (J-PARC E56) experiment aims to search for sterile neutrinos at the J-PARC Materials and Life Sciences Experimental Facility (MLF).After the submission of a proposal to the J-PARC PAC, stage-1 approval was granted to the JSNS2 experiment. The approval followed a series of background measurements which were performed in 2014. Subsequent for stage-1 approval, the JSNS2 collaboration has ma… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.01046v1-abstract-full').style.display = 'inline'; document.getElementById('1601.01046v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.01046v1-abstract-full" style="display: none;"> The JSNS2 (J-PARC E56) experiment aims to search for sterile neutrinos at the J-PARC Materials and Life Sciences Experimental Facility (MLF).After the submission of a proposal to the J-PARC PAC, stage-1 approval was granted to the JSNS2 experiment. The approval followed a series of background measurements which were performed in 2014. Subsequent for stage-1 approval, the JSNS2 collaboration has made continuous efforts to write a Technical Design Report (TDR).This TDR will include two major items as discussed in the previous status report for the 20th J-PARC PAC: (1) A realistic detector location (2) Well understood and realistic detector performance using simulation studies, primarily in consideration of fast neutron rejection. Since August we have been in discussions with MLF staff regarding an appropriate detector location. We are also in the process of setting up a Monte Carlo (MC) simulation framework in order to study detector's performance in realistic conditions. In addition, we have pursued hardware R&D work for the liquid scintillator (LS) and to improve the dynamic range of the 10" photomultiplier tubes (PMTs). The LS R&D works includes Cherenkov studies inside the LS, and a Pulse Shape Discrimination (PSD) study with a test-beam, performed at Tohoku University. We also estimate the PSD performance of a full-sized detector using a detailed MC simulation. In this status report, we describe progress on this work. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.01046v1-abstract-full').style.display = 'none'; document.getElementById('1601.01046v1-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, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.04645">arXiv:1512.04645</a> <span> [<a href="https://arxiv.org/pdf/1512.04645">pdf</a>, <a href="https://arxiv.org/format/1512.04645">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="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/10.1088/1742-6596/718/4/042022">10.1088/1742-6596/718/4/042022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dark matter search project PICO-LON </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/physics?searchtype=author&query=Kanzaki%2C+G">G. Kanzaki</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Takemoto%2C+Y">Y. Takemoto</a>, <a href="/search/physics?searchtype=author&query=Teraoka%2C+Y">Y. Teraoka</a>, <a href="/search/physics?searchtype=author&query=Umehara%2C+S">S. Umehara</a>, <a href="/search/physics?searchtype=author&query=Yasuda%2C+K">K. Yasuda</a>, <a href="/search/physics?searchtype=author&query=Yoshida%2C+S">S. Yoshida</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="1512.04645v1-abstract-short" style="display: inline;"> The PICO-LON project aims at search for cold dark matter by means of highly radio-pure and large volume NaI(Tl) scintillator. The NaI powder was purifed by chemical processing to remove lead isotopes and selecting a high purity graphite crucible. The concentrations of radioactive impurities of $^{226}$Ra and $^{228}$Th were effectively reduced to 58$\pm$4 $渭$Bq/kg and 1.5$\pm$1.9 $渭$Bq/kg, respect… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.04645v1-abstract-full').style.display = 'inline'; document.getElementById('1512.04645v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.04645v1-abstract-full" style="display: none;"> The PICO-LON project aims at search for cold dark matter by means of highly radio-pure and large volume NaI(Tl) scintillator. The NaI powder was purifed by chemical processing to remove lead isotopes and selecting a high purity graphite crucible. The concentrations of radioactive impurities of $^{226}$Ra and $^{228}$Th were effectively reduced to 58$\pm$4 $渭$Bq/kg and 1.5$\pm$1.9 $渭$Bq/kg, respectively. It should be remarked that the concentration of $^{210}$Pb, which is crucial for the sensitivity to dark matter, was reduced to 24$\pm$2 $渭$Bq/kg. The total background rate at 10 keVee was as low as 8 keV$^{-1}$kg$^{-1}$day$^{-1}$, which was sufficiently low to search for dark matter. Further purification of NaI(Tl) ingot and future prospect of PICO-LON project is discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.04645v1-abstract-full').style.display = 'none'; document.getElementById('1512.04645v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to Proceedings of TAUP 2015</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1507.07076">arXiv:1507.07076</a> <span> [<a href="https://arxiv.org/pdf/1507.07076">pdf</a>, <a href="https://arxiv.org/format/1507.07076">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"> Status Report for the 20th J-PARC PAC : A Search for Sterile Neutrino at J-PARC MLF (J-PARC E56, JSNS2) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Meigo%2C+S">S. Meigo</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+K">K. Sakai</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+S">S. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Suzuya%2C+K">K. Suzuya</a>, <a href="/search/physics?searchtype=author&query=Iwai%2C+E">E. Iwai</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a>, <a href="/search/physics?searchtype=author&query=Monjushiro%2C+S">S. Monjushiro</a>, <a href="/search/physics?searchtype=author&query=Nishikawa%2C+K">K. Nishikawa</a>, <a href="/search/physics?searchtype=author&query=Taira%2C+M">M. Taira</a>, <a href="/search/physics?searchtype=author&query=Niiyama%2C+M">M. Niiyama</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Nakano%2C+T">T. Nakano</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/physics?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Suekane%2C+F">F. Suekane</a>, <a href="/search/physics?searchtype=author&query=Stancu%2C+I">I. Stancu</a>, <a href="/search/physics?searchtype=author&query=Yeh%2C+M">M. Yeh</a>, <a href="/search/physics?searchtype=author&query=Ray%2C+H">H. Ray</a> , et al. (6 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="1507.07076v1-abstract-short" style="display: inline;"> On April 2015, the J-PARC E56 (JSNS2: J-PARC Sterile Neutrino Search using neutrinos from J-PARC Spallation Neutron Source) experiment officially obtained stage-1 approval from J-PARC. We have since started to perform liquid scintillator R&D for improving energy resolution and fast neutron rejection. Also, we are studying Avalanche Photo-Diodes (SiPM) inside the liquid scintillator. In addition to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.07076v1-abstract-full').style.display = 'inline'; document.getElementById('1507.07076v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1507.07076v1-abstract-full" style="display: none;"> On April 2015, the J-PARC E56 (JSNS2: J-PARC Sterile Neutrino Search using neutrinos from J-PARC Spallation Neutron Source) experiment officially obtained stage-1 approval from J-PARC. We have since started to perform liquid scintillator R&D for improving energy resolution and fast neutron rejection. Also, we are studying Avalanche Photo-Diodes (SiPM) inside the liquid scintillator. In addition to the R&D work, a background measurement for the proton beam bunch timing using a small liquid scintillator volume was planned, and the safety discussions for the measurement have been done. This report describes the status of the R&D work and the background measurements, in addition to the milestones required before stage-2 approval. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.07076v1-abstract-full').style.display = 'none'; document.getElementById('1507.07076v1-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 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20th J-PARC PAC status report</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.07936">arXiv:1503.07936</a> <span> [<a href="https://arxiv.org/pdf/1503.07936">pdf</a>, <a href="https://arxiv.org/ps/1503.07936">ps</a>, <a href="https://arxiv.org/format/1503.07936">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2015.08.006">10.1016/j.nima.2015.08.006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Development of time projection chamber for precise neutron lifetime measurement using pulsed cold neutron beams </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Arimoto%2C+Y">Y. Arimoto</a>, <a href="/search/physics?searchtype=author&query=Higashi%2C+N">N. Higashi</a>, <a href="/search/physics?searchtype=author&query=Igarashi%2C+Y">Y. Igarashi</a>, <a href="/search/physics?searchtype=author&query=Iwashita%2C+Y">Y. Iwashita</a>, <a href="/search/physics?searchtype=author&query=Ino%2C+T">T. Ino</a>, <a href="/search/physics?searchtype=author&query=Katayama%2C+R">R. Katayama</a>, <a href="/search/physics?searchtype=author&query=Kitahara%2C+R">R. Kitahara</a>, <a href="/search/physics?searchtype=author&query=Kitaguchi%2C+M">M. Kitaguchi</a>, <a href="/search/physics?searchtype=author&query=Matsumura%2C+H">H. Matsumura</a>, <a href="/search/physics?searchtype=author&query=Mishima%2C+K">K. Mishima</a>, <a href="/search/physics?searchtype=author&query=Oide%2C+H">H. Oide</a>, <a href="/search/physics?searchtype=author&query=Otono%2C+H">H. Otono</a>, <a href="/search/physics?searchtype=author&query=Sakakibara%2C+R">R. Sakakibara</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Shimizu%2C+H+M">H. M. Shimizu</a>, <a href="/search/physics?searchtype=author&query=Sugino%2C+T">T. Sugino</a>, <a href="/search/physics?searchtype=author&query=Sumi%2C+N">N. Sumi</a>, <a href="/search/physics?searchtype=author&query=Sumino%2C+H">H. Sumino</a>, <a href="/search/physics?searchtype=author&query=Taketani%2C+K">K. Taketani</a>, <a href="/search/physics?searchtype=author&query=Tanaka%2C+G">G. Tanaka</a>, <a href="/search/physics?searchtype=author&query=Tanaka%2C+M">M. Tanaka</a>, <a href="/search/physics?searchtype=author&query=Tauchi%2C+K">K. Tauchi</a>, <a href="/search/physics?searchtype=author&query=Toyoda%2C+A">A. Toyoda</a>, <a href="/search/physics?searchtype=author&query=Yamada%2C+T">T. Yamada</a>, <a href="/search/physics?searchtype=author&query=Yamashita%2C+S">S. Yamashita</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="1503.07936v2-abstract-short" style="display: inline;"> A new time projection chamber (TPC) was developed for neutron lifetime measurement using a pulsed cold neutron spallation source at the Japan Proton Accelerator Research Complex (J-PARC). Managing considerable background events from natural sources and the beam radioactivity is a challenging aspect of this measurement. To overcome this problem, the developed TPC has unprecedented features such as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.07936v2-abstract-full').style.display = 'inline'; document.getElementById('1503.07936v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.07936v2-abstract-full" style="display: none;"> A new time projection chamber (TPC) was developed for neutron lifetime measurement using a pulsed cold neutron spallation source at the Japan Proton Accelerator Research Complex (J-PARC). Managing considerable background events from natural sources and the beam radioactivity is a challenging aspect of this measurement. To overcome this problem, the developed TPC has unprecedented features such as the use of polyether-ether-ketone plates in the support structure and internal surfaces covered with $^6$Li-enriched tiles to absorb outlier neutrons. In this paper, the design and performance of the new TPC are reported in detail. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.07936v2-abstract-full').style.display = 'none'; document.getElementById('1503.07936v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">33 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Instrument sand Methods in Physics Research A, 799 (2015) 187 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.06324">arXiv:1502.06324</a> <span> [<a href="https://arxiv.org/pdf/1502.06324">pdf</a>, <a href="https://arxiv.org/format/1502.06324">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/10.1093/ptep/ptv078">10.1093/ptep/ptv078 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> On-site Background Measurements for the J-PARC E56 Experiment: A Search for Sterile Neutrino at J-PARC MLF </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/physics?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/physics?searchtype=author&query=Enomoto%2C+T">T. Enomoto</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Igarashi%2C+Y">Y. Igarashi</a>, <a href="/search/physics?searchtype=author&query=Iwai%2C+E">E. Iwai</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a>, <a href="/search/physics?searchtype=author&query=Meigo%2C+S">S. Meigo</a>, <a href="/search/physics?searchtype=author&query=Nakano%2C+T">T. Nakano</a>, <a href="/search/physics?searchtype=author&query=Niiyama%2C+M">M. Niiyama</a>, <a href="/search/physics?searchtype=author&query=Nishikawa%2C+K">K. Nishikawa</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Ohta%2C+R">R. Ohta</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+H">H. Sakai</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+K">K. Sakai</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+S">S. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Suekane%2C+F">F. Suekane</a>, <a href="/search/physics?searchtype=author&query=Suzuki%2C+S+Y">S. Y. Suzuki</a>, <a href="/search/physics?searchtype=author&query=Suzuya%2C+K">K. Suzuya</a>, <a href="/search/physics?searchtype=author&query=Tauchi%2C+K">K. Tauchi</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="1502.06324v2-abstract-short" style="display: inline;"> The J-PARC E56 experiment aims to search for sterile neutrinos at the J-PARC Materials and Life Science Experimental Facility (MLF). In order to examine the feasibility of the experiment, we measured the background rates of different detector candidate sites, which are located at the third floor of the MLF, using a detector consisting of plastic scintillators with a fiducial mass of 500 kg. The re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.06324v2-abstract-full').style.display = 'inline'; document.getElementById('1502.06324v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.06324v2-abstract-full" style="display: none;"> The J-PARC E56 experiment aims to search for sterile neutrinos at the J-PARC Materials and Life Science Experimental Facility (MLF). In order to examine the feasibility of the experiment, we measured the background rates of different detector candidate sites, which are located at the third floor of the MLF, using a detector consisting of plastic scintillators with a fiducial mass of 500 kg. The result of the measurements is described in this article. The gammas and neutrons induced by the beam as well as the backgrounds from the cosmic rays were measured. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.06324v2-abstract-full').style.display = 'none'; document.getElementById('1502.06324v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">submitted to PTEP. arXiv admin note: substantial text overlap with arXiv:1502.02255: Revision on 2015-April-22</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.02255">arXiv:1502.02255</a> <span> [<a href="https://arxiv.org/pdf/1502.02255">pdf</a>, <a href="https://arxiv.org/format/1502.02255">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"> Status Report (BKG measurement): A Search for Sterile Neutrino at J-PARC MLF </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Meigo%2C+S">S. Meigo</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+K">K. Sakai</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+S">S. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Suzuya%2C+K">K. Suzuya</a>, <a href="/search/physics?searchtype=author&query=Iwai%2C+E">E. Iwai</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a>, <a href="/search/physics?searchtype=author&query=Monjushiro%2C+H">H. Monjushiro</a>, <a href="/search/physics?searchtype=author&query=Nishikawa%2C+K">K. Nishikawa</a>, <a href="/search/physics?searchtype=author&query=Ohta%2C+R">R. Ohta</a>, <a href="/search/physics?searchtype=author&query=Taira%2C+M">M. Taira</a>, <a href="/search/physics?searchtype=author&query=Niiyama%2C+M">M. Niiyama</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Nakano%2C+T">T. Nakano</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/physics?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/physics?searchtype=author&query=Enomoto%2C+T">T. Enomoto</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+H">H. Sakai</a>, <a href="/search/physics?searchtype=author&query=Suekane%2C+F">F. Suekane</a> , et al. (9 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="1502.02255v1-abstract-short" style="display: inline;"> At the 17th J-PARC PAC, which was held on September 2013, we proposed the sterile neutrino search at J-PARC MLF. After reviewing the proposal, PAC recommended to have a background measurement at the detector's candidate site location in their report to investigate whether the background rates can be manageable for the real experiment or not. Therefore, we have performed the background measurements… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.02255v1-abstract-full').style.display = 'inline'; document.getElementById('1502.02255v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.02255v1-abstract-full" style="display: none;"> At the 17th J-PARC PAC, which was held on September 2013, we proposed the sterile neutrino search at J-PARC MLF. After reviewing the proposal, PAC recommended to have a background measurement at the detector's candidate site location in their report to investigate whether the background rates can be manageable for the real experiment or not. Therefore, we have performed the background measurements (MLF; 2013BU1301 test experiment) during the summer of 2014, also following the 18th J-PARC PAC recommendations, and the measurements results are described here. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.02255v1-abstract-full').style.display = 'none'; document.getElementById('1502.02255v1-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 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.01748">arXiv:1502.01748</a> <span> [<a href="https://arxiv.org/pdf/1502.01748">pdf</a>, <a href="https://arxiv.org/ps/1502.01748">ps</a>, <a href="https://arxiv.org/format/1502.01748">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2015.01.001">10.1016/j.nima.2015.01.001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Majorana Parts Tracking Database </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+Majorana+Collaboration"> The Majorana Collaboration</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+N">N. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Byram%2C+D">D. Byram</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A+S">A. S. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Esterline%2C+J">J. Esterline</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a>, <a href="/search/physics?searchtype=author&query=Fraenkle%2C+F+M">F. M. Fraenkle</a>, <a href="/search/physics?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a> , et al. (67 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="1502.01748v1-abstract-short" style="display: inline;"> The Majorana Demonstrator is an ultra-low background physics experiment searching for the neutrinoless double beta decay of $^{76}$Ge. The Majorana Parts Tracking Database is used to record the history of components used in the construction of the Demonstrator. The tracking implementation takes a novel approach based on the schema-free database technology CouchDB. Transportation, storage, and proc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.01748v1-abstract-full').style.display = 'inline'; document.getElementById('1502.01748v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.01748v1-abstract-full" style="display: none;"> The Majorana Demonstrator is an ultra-low background physics experiment searching for the neutrinoless double beta decay of $^{76}$Ge. The Majorana Parts Tracking Database is used to record the history of components used in the construction of the Demonstrator. The tracking implementation takes a novel approach based on the schema-free database technology CouchDB. Transportation, storage, and processes undergone by parts such as machining or cleaning are linked to part records. Tracking parts provides a great logistics benefit and an important quality assurance reference during construction. In addition, the location history of parts provides an estimate of their exposure to cosmic radiation. A web application for data entry and a radiation exposure calculator have been developed as tools for achieving the extreme radio-purity required for this rare decay search. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.01748v1-abstract-full').style.display = 'none'; document.getElementById('1502.01748v1-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 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instrum. Meth. in Phys. Res. Sec. A, Volume 779, 11 April 2015, Pages 52-62 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1407.3542">arXiv:1407.3542</a> <span> [<a href="https://arxiv.org/pdf/1407.3542">pdf</a>, <a href="https://arxiv.org/format/1407.3542">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="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> KamLAND-PICO project to search for cosmic dark matter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Awatani%2C+Y">Y. Awatani</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Ikeda%2C+H">H. Ikeda</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</a>, <a href="/search/physics?searchtype=author&query=Inoue%2C+K">K. Inoue</a>, <a href="/search/physics?searchtype=author&query=Kozlov%2C+A">A. Kozlov</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Yasuda%2C+R+S+K">R. Sugawaraand K. Yasuda</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="1407.3542v1-abstract-short" style="display: inline;"> KamLAND-PICO project aims to search for WIMPs dark matter by means of NaI(Tl) scintillator. To investigate the WIMPs candidate whose cross section is as small as $10^{-9}$ pb, a pure NaI(Tl) crystal was developed by chemical processing and taking care of surroundings. The concentration of U and Th chain was reduced to $5.4\pm0.9$ ppt and $3.3\pm2.2$ ppt, respectively. It should be remarked that th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.3542v1-abstract-full').style.display = 'inline'; document.getElementById('1407.3542v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1407.3542v1-abstract-full" style="display: none;"> KamLAND-PICO project aims to search for WIMPs dark matter by means of NaI(Tl) scintillator. To investigate the WIMPs candidate whose cross section is as small as $10^{-9}$ pb, a pure NaI(Tl) crystal was developed by chemical processing and taking care of surroundings. The concentration of U and Th chain was reduced to $5.4\pm0.9$ ppt and $3.3\pm2.2$ ppt, respectively. It should be remarked that the concentration of $^{210}$Pb which was difficult to reduce reached to the high purity as $58\pm26$ $渭$Bq/kg. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.3542v1-abstract-full').style.display = 'none'; document.getElementById('1407.3542v1-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 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages 5 figures, Proceedings of the 26th Workshop on "Radiation Detectors and Their Uses" January 26-28 20214. KEK Tsukuba Japan. Accepted for publication</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Proceedings of the 28th Workshop on Radiation Detector and Theis Uses, KEK Proceedings 2014-11, (2015) pp23 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1407.2238">arXiv:1407.2238</a> <span> [<a href="https://arxiv.org/pdf/1407.2238">pdf</a>, <a href="https://arxiv.org/format/1407.2238">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> A Dark Matter Search with MALBEK </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Giovanetti%2C+G+K">G. K. Giovanetti</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+N">N. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Byram%2C+D">D. Byram</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A+S">A. S. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a>, <a href="/search/physics?searchtype=author&query=Fraenkle%2C+F+M">F. M. Fraenkle</a>, <a href="/search/physics?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a> , et al. (62 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="1407.2238v1-abstract-short" style="display: inline;"> The MAJORANA DEMONSTRATOR is an array of natural and enriched high purity germanium detectors that will search for the neutrinoless double-beta decay of 76-Ge and perform a search for weakly interacting massive particles (WIMPs) with masses below 10 GeV. As part of the MAJORANA research and development efforts, we have deployed a modified, low-background broad energy germanium detector at the Kimb… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.2238v1-abstract-full').style.display = 'inline'; document.getElementById('1407.2238v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1407.2238v1-abstract-full" style="display: none;"> The MAJORANA DEMONSTRATOR is an array of natural and enriched high purity germanium detectors that will search for the neutrinoless double-beta decay of 76-Ge and perform a search for weakly interacting massive particles (WIMPs) with masses below 10 GeV. As part of the MAJORANA research and development efforts, we have deployed a modified, low-background broad energy germanium detector at the Kimballton Underground Research Facility. With its sub-keV energy threshold, this detector is sensitive to potential non-Standard Model physics, including interactions with WIMPs. We discuss the backgrounds present in the WIMP region of interest and explore the impact of slow surface event contamination when searching for a WIMP signal. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.2238v1-abstract-full').style.display = 'none'; document.getElementById('1407.2238v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To appear in the Proceedings of the 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 (F. Avignone & W. Haxton, editors, Physics Procedia, Elsevier)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.1370">arXiv:1405.1370</a> <span> [<a href="https://arxiv.org/pdf/1405.1370">pdf</a>, <a href="https://arxiv.org/format/1405.1370">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Background Model for the Majorana Demonstrator </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+N">N. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Byram%2C+D">D. Byram</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A+S">A. S. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a>, <a href="/search/physics?searchtype=author&query=Fraenkle%2C+F+M">F. M. Fraenkle</a>, <a href="/search/physics?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a> , et al. (63 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1405.1370v1-abstract-short" style="display: inline;"> The Majorana Collaboration is constructing a system containing 40 kg of HPGe detectors to demonstrate the feasibility and potential of a future tonne-scale experiment capable of probing the neutrino mass scale in the inverted-hierarchy region. To realize this, a major goal of the Majorana Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.1370v1-abstract-full').style.display = 'inline'; document.getElementById('1405.1370v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.1370v1-abstract-full" style="display: none;"> The Majorana Collaboration is constructing a system containing 40 kg of HPGe detectors to demonstrate the feasibility and potential of a future tonne-scale experiment capable of probing the neutrino mass scale in the inverted-hierarchy region. To realize this, a major goal of the Majorana Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest around the Q-value at 2039 keV. This goal is pursued through a combination of a significant reduction of radioactive impurities in construction materials with analytical methods for background rejection, for example using powerful pulse shape analysis techniques profiting from the p-type point contact HPGe detectors technology. The effectiveness of these methods is assessed using simulations of the different background components whose purity levels are constrained from radioassay measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.1370v1-abstract-full').style.display = 'none'; document.getElementById('1405.1370v1-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 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To appear in the Proceedings of the 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 (F. Avignone & W. Haxton, editors, Physics Procedia, Elsevier)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.7399">arXiv:1404.7399</a> <span> [<a href="https://arxiv.org/pdf/1404.7399">pdf</a>, <a href="https://arxiv.org/format/1404.7399">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Testing the Ge detectors for the MAJORANA DEMONSTRATOR </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Xu%2C+W">W. Xu</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+N">N. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Byram%2C+D">D. Byram</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A+S">A. S. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a>, <a href="/search/physics?searchtype=author&query=Fraenkle%2C+F+M">F. M. Fraenkle</a>, <a href="/search/physics?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a> , et al. (62 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1404.7399v1-abstract-short" style="display: inline;"> High purity germanium (HPGe) crystals will be used for the MAJORANA DEMONSTRATOR, where they serve as both the source and the detector for neutrinoless double beta decay. It is crucial for the experiment to understand the performance of the HPGe crystals. A variety of crystal properties are being investigated, including basic properties such as energy resolution, efficiency, uniformity, capacitanc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.7399v1-abstract-full').style.display = 'inline'; document.getElementById('1404.7399v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.7399v1-abstract-full" style="display: none;"> High purity germanium (HPGe) crystals will be used for the MAJORANA DEMONSTRATOR, where they serve as both the source and the detector for neutrinoless double beta decay. It is crucial for the experiment to understand the performance of the HPGe crystals. A variety of crystal properties are being investigated, including basic properties such as energy resolution, efficiency, uniformity, capacitance, leakage current and crystal axis orientation, as well as more sophisticated properties, e.g. pulse shapes and dead layer and transition layer distributions. In this paper, we will present our measurements that characterize the HPGe crystals. We will also discuss our simulation package for the detector characterization setup, and show that additional information can be extracted from data-simulation comparisons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.7399v1-abstract-full').style.display = 'none'; document.getElementById('1404.7399v1-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 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To appear in the Proceedings of the 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 (F. Avignone & W. Haxton, editors, Physics Procedia, Elsevier)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LA-UR-14-22505 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.3310">arXiv:1311.3310</a> <span> [<a href="https://arxiv.org/pdf/1311.3310">pdf</a>, <a href="https://arxiv.org/format/1311.3310">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Status of the MAJORANA DEMONSTRATOR experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=MAJORANA+Collaboration"> MAJORANA Collaboration</a>, <a href="/search/physics?searchtype=author&query=Martin%2C+R+D">R. D. Martin</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+N">N. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A+S">A. S. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Esterline%2C+J">J. Esterline</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a>, <a href="/search/physics?searchtype=author&query=Fraenkle%2C+F+M">F. M. Fraenkle</a>, <a href="/search/physics?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a> , et al. (60 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.3310v1-abstract-short" style="display: inline;"> The MAJORANA DEMONSTRATOR neutrinoless double beta-decay experiment is currently under construction at the Sanford Underground Research Facility in South Dakota, USA. An overview and status of the experiment are given. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.3310v1-abstract-full" style="display: none;"> The MAJORANA DEMONSTRATOR neutrinoless double beta-decay experiment is currently under construction at the Sanford Underground Research Facility in South Dakota, USA. An overview and status of the experiment are given. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.3310v1-abstract-full').style.display = 'none'; document.getElementById('1311.3310v1-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 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, proceeding from VII International Conference on Interconnections between Particle Physics and Cosmology (PPC 2013), submitted to AIP 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/1310.1437">arXiv:1310.1437</a> <span> [<a href="https://arxiv.org/pdf/1310.1437">pdf</a>, <a href="https://arxiv.org/format/1310.1437">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"> Proposal: A Search for Sterile Neutrino at J-PARC Materials and Life Science Experimental Facility </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Harada%2C+M">M. Harada</a>, <a href="/search/physics?searchtype=author&query=Hasegawa%2C+S">S. Hasegawa</a>, <a href="/search/physics?searchtype=author&query=Kasugai%2C+Y">Y. Kasugai</a>, <a href="/search/physics?searchtype=author&query=Meigo%2C+S">S. Meigo</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+K">K. Sakai</a>, <a href="/search/physics?searchtype=author&query=Sakamoto%2C+S">S. Sakamoto</a>, <a href="/search/physics?searchtype=author&query=Suzuya%2C+K">K. Suzuya</a>, <a href="/search/physics?searchtype=author&query=Iwai%2C+E">E. Iwai</a>, <a href="/search/physics?searchtype=author&query=Maruyama%2C+T">T. Maruyama</a>, <a href="/search/physics?searchtype=author&query=Nishikawa%2C+K">K. Nishikawa</a>, <a href="/search/physics?searchtype=author&query=Ohta%2C+R">R. Ohta</a>, <a href="/search/physics?searchtype=author&query=Niiyama%2C+M">M. Niiyama</a>, <a href="/search/physics?searchtype=author&query=Ajimura%2C+S">S. Ajimura</a>, <a href="/search/physics?searchtype=author&query=Hiraiwa%2C+T">T. Hiraiwa</a>, <a href="/search/physics?searchtype=author&query=Nakano%2C+T">T. Nakano</a>, <a href="/search/physics?searchtype=author&query=Nomachi%2C+M">M. Nomachi</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/physics?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/physics?searchtype=author&query=Enomoto%2C+T">T. Enomoto</a>, <a href="/search/physics?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/physics?searchtype=author&query=Sakai%2C+H">H. Sakai</a>, <a href="/search/physics?searchtype=author&query=Suekane%2C+F">F. Suekane</a>, <a href="/search/physics?searchtype=author&query=Yeh%2C+M">M. Yeh</a>, <a href="/search/physics?searchtype=author&query=Garvey%2C+G+T">G. T. Garvey</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1310.1437v1-abstract-short" style="display: inline;"> We propose a definite search for sterile neutrinos at the J-PARC Materials and Life Science Experimental Facility (MLF). With the 3 GeV Rapid Cycling Synchrotron (RCS) and spallation neutron target, an intense neutrino beam from muon decay at rest (DAR) is available. Neutrinos come from 渭+ decay, and the oscillation to be searched for is (anti 谓渭-> anti 谓e) which is detected by the inverse 尾decay… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.1437v1-abstract-full').style.display = 'inline'; document.getElementById('1310.1437v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.1437v1-abstract-full" style="display: none;"> We propose a definite search for sterile neutrinos at the J-PARC Materials and Life Science Experimental Facility (MLF). With the 3 GeV Rapid Cycling Synchrotron (RCS) and spallation neutron target, an intense neutrino beam from muon decay at rest (DAR) is available. Neutrinos come from 渭+ decay, and the oscillation to be searched for is (anti 谓渭-> anti 谓e) which is detected by the inverse 尾decay interaction (anti 谓e + p -> e+ + n), followed by a gamma from neutron capture. The unique features of the proposed experiment, compared with the LSND and experiments using horn focused beams, are; (1) The pulsed beam with about 600 ns spill width from J-PARC RCS and muon long lifetime allow us to select neutrinos from 渭DAR only. (2) Due to nuclear absorption of 蟺- and 渭-, neutrinos from 渭- decay are suppressed to about the $10^{-3}$ level. (3) Neutrino cross sections are well known. The inverse 尾decay cross section is known to be a few percent accuracy. (4) The neutrino energy can be calculated from positron energy by adding ~1.8 MeV. (5) The anti 谓渭and 谓e fluxes have different and well defined spectra. This allows us to separate oscillated signals from those due to 渭- decay contamination. We propose to proceed with the oscillation search in steps since the region of 螖m^2 to be searched can be anywhere between sub-eV^2 to several tens of eV^2. We start to examine the large 螖m^2 region, which can be done with short baseline at first. At close distance to the MLF target gives a high neutrino flux, and allows us to use relatively small detector. If no definitive positive signal is found, a future option exists to cover small 螖m^2 region. This needs a relatively long baseline and requires a large detector to compensate for the reduced neutrino flux. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.1437v1-abstract-full').style.display = 'none'; document.getElementById('1310.1437v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2013. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1308.1633">arXiv:1308.1633</a> <span> [<a href="https://arxiv.org/pdf/1308.1633">pdf</a>, <a href="https://arxiv.org/format/1308.1633">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> The {\sc Majorana Demonstrator} Neutrinoless Double-Beta Decay Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Majorana+Collaboration"> Majorana Collaboration</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+N">N. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A+S">A. S. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Esterline%2C+J">J. Esterline</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a>, <a href="/search/physics?searchtype=author&query=Fraenkle%2C+F+M">F. M. Fraenkle</a>, <a href="/search/physics?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a>, <a href="/search/physics?searchtype=author&query=Giovanetti%2C+G+K">G. K. Giovanetti</a> , et al. (60 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1308.1633v1-abstract-short" style="display: inline;"> The {\sc Majorana Demonstrator will search for the neutrinoless double-beta decay of the isotope Ge-76 with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate the neutrino is its own antiparticle, demonstrate that lepton number is not conserved, and provide information on the absolute mass scale of the neutrino. The {\sc Demonstrator} is be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1308.1633v1-abstract-full').style.display = 'inline'; document.getElementById('1308.1633v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1308.1633v1-abstract-full" style="display: none;"> The {\sc Majorana Demonstrator will search for the neutrinoless double-beta decay of the isotope Ge-76 with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate the neutrino is its own antiparticle, demonstrate that lepton number is not conserved, and provide information on the absolute mass scale of the neutrino. The {\sc Demonstrator} is being assembled at the 4850-foot level of the Sanford Underground Research Facility in Lead, South Dakota. The array will be situated in a low-background environment and surrounded by passive and active shielding. Here we describe the science goals of the {\sc Demonstrator} and the details of its design. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1308.1633v1-abstract-full').style.display = 'none'; document.getElementById('1308.1633v1-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 August, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">accepted for publication in Advances in High Energy Physics</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LA-UR-13-24815 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.7777">arXiv:1307.7777</a> <span> [<a href="https://arxiv.org/pdf/1307.7777">pdf</a>, <a href="https://arxiv.org/format/1307.7777">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"> The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=MAJORANA+Collaboration"> MAJORANA Collaboration</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Abgrall%2C+N">N. Abgrall</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A+S">A. S. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Esterline%2C+J">J. Esterline</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a>, <a href="/search/physics?searchtype=author&query=Fraenkleo%2C+F+M">F. M. Fraenkleo</a>, <a href="/search/physics?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a>, <a href="/search/physics?searchtype=author&query=Giovanetti%2C+G+K">G. K. Giovanetti</a> , et al. (58 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="1307.7777v1-abstract-short" style="display: inline;"> The {\sc Majorana} collaboration is searching for neutrinoless double beta decay using $^{76}$Ge, which has been shown to have a number of advantages in terms of sensitivities and backgrounds. The observation of neutrinoless double-beta decay would show that lepton number is violated and that neutrinos are Majorana particles and would simultaneously provide information on neutrino mass. Attaining… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7777v1-abstract-full').style.display = 'inline'; document.getElementById('1307.7777v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.7777v1-abstract-full" style="display: none;"> The {\sc Majorana} collaboration is searching for neutrinoless double beta decay using $^{76}$Ge, which has been shown to have a number of advantages in terms of sensitivities and backgrounds. The observation of neutrinoless double-beta decay would show that lepton number is violated and that neutrinos are Majorana particles and would simultaneously provide information on neutrino mass. Attaining sensitivities for neutrino masses in the inverted hierarchy region, $15 - 50$ meV, will require large, tonne-scale detectors with extremely low backgrounds, at the level of $\sim$1 count/t-y or lower in the region of the signal. The {\sc Majorana} collaboration, with funding support from DOE Office of Nuclear Physics and NSF Particle Astrophysics, is constructing the {\sc Demonstrator}, an array consisting of 40 kg of p-type point-contact high-purity germanium (HPGe) detectors, of which $\sim$30 kg will be enriched to 87% in $^{76}$Ge. The {\sc Demonstrator} is being constructed in a clean room laboratory facility at the 4850' level (4300 m.w.e.) of the Sanford Underground Research Facility (SURF) in Lead, SD. It utilizes a compact graded shield approach with the inner portion consisting of ultra-clean Cu that is being electroformed and machined underground. The primary aim of the {\sc Demonstrator} is to show the feasibility of a future tonne-scale measurement in terms of backgrounds and scalability. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7777v1-abstract-full').style.display = 'none'; document.getElementById('1307.7777v1-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 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings for the MEDEX 2013 Conference</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LA-UR-13-25839 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1207.6716">arXiv:1207.6716</a> <span> [<a href="https://arxiv.org/pdf/1207.6716">pdf</a>, <a href="https://arxiv.org/ps/1207.6716">ps</a>, <a href="https://arxiv.org/format/1207.6716">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"> Characteristics of Signals Originating Near the Lithium-Diffused N+ Contact of High Purity Germanium P-Type Point Contact Detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+MAJORANA+Collaboration"> The MAJORANA Collaboration</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Amman%2C+M">M. Amman</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Barton%2C+P+J">P. J. Barton</a>, <a href="/search/physics?searchtype=author&query=Beene%2C+J+R">J. R. Beene</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y">Y-D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Collar%2C+J+I">J. I. Collar</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Cooper%2C+R+J">R. J. Cooper</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Yu. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Esterline%2C+J">J. Esterline</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Fields%2C+N">N. Fields</a> , et al. (61 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="1207.6716v1-abstract-short" style="display: inline;"> A study of signals originating near the lithium-diffused n+ contact of p-type point contact (PPC) high purity germanium detectors (HPGe) is presented. The transition region between the active germanium and the fully dead layer of the n+ contact is examined. Energy depositions in this transition region are shown to result in partial charge collection. This provides a mechanism for events with a wel… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.6716v1-abstract-full').style.display = 'inline'; document.getElementById('1207.6716v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1207.6716v1-abstract-full" style="display: none;"> A study of signals originating near the lithium-diffused n+ contact of p-type point contact (PPC) high purity germanium detectors (HPGe) is presented. The transition region between the active germanium and the fully dead layer of the n+ contact is examined. Energy depositions in this transition region are shown to result in partial charge collection. This provides a mechanism for events with a well defined energy to contribute to the continuum of the energy spectrum at lower energies. A novel technique to quantify the contribution from this source of background is introduced. Experiments that operate germanium detectors with a very low energy threshold may benefit from the methods presented herein. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.6716v1-abstract-full').style.display = 'none'; document.getElementById('1207.6716v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 July, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2012. </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">32 pages, 14 figures, submitted to Nucl. Instrum. Meth. 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/1203.4872">arXiv:1203.4872</a> <span> [<a href="https://arxiv.org/pdf/1203.4872">pdf</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="Instrumentation and Methods for Astrophysics">astro-ph.IM</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"> The Performance of the Thin NaI(Tl) Detector Pico-Lon for Dark Matter Search </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Harada%2C+K">K. Harada</a>, <a href="/search/physics?searchtype=author&query=Fushimi%2C+K">K. Fushimi</a>, <a href="/search/physics?searchtype=author&query=Nakayama%2C+S">S. Nakayama</a>, <a href="/search/physics?searchtype=author&query=Orito%2C+R">R. Orito</a>, <a href="/search/physics?searchtype=author&query=Iida%2C+S">S. Iida</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+S">S. Ito</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">T. Shima</a>, <a href="/search/physics?searchtype=author&query=Hazama%2C+R">R. Hazama</a>, <a href="/search/physics?searchtype=author&query=Matsumoto%2C+E">E. Matsumoto</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+H">H. Ito</a>, <a href="/search/physics?searchtype=author&query=Imagawa%2C+K">K. Imagawa</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="1203.4872v2-abstract-short" style="display: inline;"> Thin and large area NaI(Tl) scintillator to search for WIMPs dark matter was developed. The performance of thin and wide area NaI(Tl) showed good enough to search for dark matter. The energy threshold was as low as 2keV and the energy resolution was about 24% in FWHM at 60keV. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1203.4872v2-abstract-full" style="display: none;"> Thin and large area NaI(Tl) scintillator to search for WIMPs dark matter was developed. The performance of thin and wide area NaI(Tl) showed good enough to search for dark matter. The energy threshold was as low as 2keV and the energy resolution was about 24% in FWHM at 60keV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1203.4872v2-abstract-full').style.display = 'none'; document.getElementById('1203.4872v2-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 June, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 March, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2012. </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">7pages, 7figures, Proceedings of the 26th Workshop on Radiation Detectors and Their Uses, KEK-Proc1225008, (2012) p122</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1203.0711">arXiv:1203.0711</a> <span> [<a href="https://arxiv.org/pdf/1203.0711">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevSTAB.15.024701">10.1103/PhysRevSTAB.15.024701 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Resonant photonuclear isotope detection using medium-energy photon beam </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">Hiroyasu Ejiri</a>, <a href="/search/physics?searchtype=author&query=Shima%2C+T">Tatsushi Shima</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="1203.0711v1-abstract-short" style="display: inline;"> Resonant photonuclear isotope detection (RPID) is a nondestructive detection/assay of nuclear isotopes by measuring gamma rays following photonuclear reaction products. Medium-energy wideband photons of 12-16 MeV are used for the photonuclear reactions and gamma rays characteristic of the reaction products are measured by means of high-sensitivity Ge detectors. Impurities of stable and radioactive… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1203.0711v1-abstract-full').style.display = 'inline'; document.getElementById('1203.0711v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1203.0711v1-abstract-full" style="display: none;"> Resonant photonuclear isotope detection (RPID) is a nondestructive detection/assay of nuclear isotopes by measuring gamma rays following photonuclear reaction products. Medium-energy wideband photons of 12-16 MeV are used for the photonuclear reactions and gamma rays characteristic of the reaction products are measured by means of high-sensitivity Ge detectors. Impurities of stable and radioactive isotopes of the orders of micro-nano gr and ppm-ppb are investigated. RPID is used to study nuclear isotopes of astronuclear and particle physics interests and those of geological and historical interests. It is used to identify radioactive isotopes of fission products as well. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1203.0711v1-abstract-full').style.display = 'none'; document.getElementById('1203.0711v1-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, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review Special Topics - Accelerators and Beams 15, 024701 (2012) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1111.5578">arXiv:1111.5578</a> <span> [<a href="https://arxiv.org/pdf/1111.5578">pdf</a>, <a href="https://arxiv.org/ps/1111.5578">ps</a>, <a href="https://arxiv.org/format/1111.5578">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/381/1/012044">10.1088/1742-6596/381/1/012044 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Majorana experiment: an ultra-low background search for neutrinoless double-beta decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Phillips%2C+D+G">D. G. Phillips II</a>, <a href="/search/physics?searchtype=author&query=Aguayo%2C+E">E. Aguayo</a>, <a href="/search/physics?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/physics?searchtype=author&query=Back%2C+H+O">H. O. Back</a>, <a href="/search/physics?searchtype=author&query=Barabash%2C+A+S">A. S. Barabash</a>, <a href="/search/physics?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/physics?searchtype=author&query=Bertrand%2C+F+E">F. E. Bertrand</a>, <a href="/search/physics?searchtype=author&query=Boswell%2C+M">M. Boswell</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Chan%2C+Y+-">Y. -D. Chan</a>, <a href="/search/physics?searchtype=author&query=Christofferson%2C+C+D">C. D. Christofferson</a>, <a href="/search/physics?searchtype=author&query=Collar%2C+J+I">J. I. Collar</a>, <a href="/search/physics?searchtype=author&query=Combs%2C+D+C">D. C. Combs</a>, <a href="/search/physics?searchtype=author&query=Cooper%2C+R+J">R. J. Cooper</a>, <a href="/search/physics?searchtype=author&query=Detwiler%2C+J+A">J. A. Detwiler</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Y. Efremenko</a>, <a href="/search/physics?searchtype=author&query=Egorov%2C+V">V. Egorov</a>, <a href="/search/physics?searchtype=author&query=Ejiri%2C+H">H. Ejiri</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+S+R">S. R. Elliott</a>, <a href="/search/physics?searchtype=author&query=Esterline%2C+J">J. Esterline</a>, <a href="/search/physics?searchtype=author&query=Fast%2C+J+E">J. E. Fast</a>, <a href="/search/physics?searchtype=author&query=Fields%2C+N">N. Fields</a>, <a href="/search/physics?searchtype=author&query=Finnerty%2C+P">P. Finnerty</a> , et al. (64 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="1111.5578v1-abstract-short" style="display: inline;"> The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objectiv… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.5578v1-abstract-full').style.display = 'inline'; document.getElementById('1111.5578v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.5578v1-abstract-full" style="display: none;"> The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objective of the Demonstrator is to determine whether a future 1-tonne experiment can achieve a background goal of one count per tonne-year in a narrow region of interest around the 76Ge neutrinoless double-beta decay peak. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.5578v1-abstract-full').style.display = 'none'; document.getElementById('1111.5578v1-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 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2011. </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">Presentation for the Rutherford Centennial Conference on Nuclear Physics</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2012 J. Phys.: Conf. Ser. 381 012044 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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