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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/2409.14691">arXiv:2409.14691</a> <span> [<a href="https://arxiv.org/pdf/2409.14691">pdf</a>, <a href="https://arxiv.org/format/2409.14691">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"> Measurements of a LYSO crystal array from threshold to 100 MeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Beesley%2C+O">O. Beesley</a>, <a href="/search/physics?searchtype=author&query=Carlton%2C+J">J. Carlton</a>, <a href="/search/physics?searchtype=author&query=Davis-Purcell%2C+B">B. Davis-Purcell</a>, <a href="/search/physics?searchtype=author&query=Ding%2C+D">D. Ding</a>, <a href="/search/physics?searchtype=author&query=Foster%2C+S">S. Foster</a>, <a href="/search/physics?searchtype=author&query=Frahm%2C+K">K. Frahm</a>, <a href="/search/physics?searchtype=author&query=Gibbons%2C+L">L. Gibbons</a>, <a href="/search/physics?searchtype=author&query=Gorringe%2C+T">T. Gorringe</a>, <a href="/search/physics?searchtype=author&query=Hertzog%2C+D+W">D. W. Hertzog</a>, <a href="/search/physics?searchtype=author&query=Hochrein%2C+S">S. Hochrein</a>, <a href="/search/physics?searchtype=author&query=Hui%2C+J">J. Hui</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=LaBounty%2C+J">J. LaBounty</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+J">J. Liu</a>, <a href="/search/physics?searchtype=author&query=Roehnelt%2C+R">R. Roehnelt</a>, <a href="/search/physics?searchtype=author&query=Schwendimann%2C+P">P. Schwendimann</a>, <a href="/search/physics?searchtype=author&query=Soter%2C+A">A. Soter</a>, <a href="/search/physics?searchtype=author&query=Swanson%2C+E">E. Swanson</a>, <a href="/search/physics?searchtype=author&query=Taylor%2C+B">B. Taylor</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="2409.14691v1-abstract-short" style="display: inline;"> We report measurements of ten custom-made high-homogeneity LYSO crystals. The investigation is motivated by the need for a compact, high-resolution, and fast electromagnetic calorimeter for a new rare pion decay experiment. Each $2.5\times 2.5 \times 18$ cm$^3$ crystal was first characterized for general light yield properties and then its longitudinal response uniformity and energy resolution wer… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.14691v1-abstract-full').style.display = 'inline'; document.getElementById('2409.14691v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.14691v1-abstract-full" style="display: none;"> We report measurements of ten custom-made high-homogeneity LYSO crystals. The investigation is motivated by the need for a compact, high-resolution, and fast electromagnetic calorimeter for a new rare pion decay experiment. Each $2.5\times 2.5 \times 18$ cm$^3$ crystal was first characterized for general light yield properties and then its longitudinal response uniformity and energy resolution were measured using low-energy gamma sources. The ten crystals were assembled as an array and subjected to a 30 - 100 MeV positron beam with excellent momentum definition. The energy and timing resolutions were measured as a function of energy, and the spatial resolution was determined at 70 MeV. An additional measurement using monoenergetic 17.6 MeV gammas produced through a p-Li resonance was later made after the photosensors used in positron testing were improved. As an example of the results, the energy resolution at 70 MeV of 1.80 $\pm$ 0.05% is more than two times better than reported results using previous generation LYSO crystals. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.14691v1-abstract-full').style.display = 'none'; document.getElementById('2409.14691v1-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.02550">arXiv:2405.02550</a> <span> [<a href="https://arxiv.org/pdf/2405.02550">pdf</a>, <a href="https://arxiv.org/format/2405.02550">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.2024.169395">10.1016/j.nima.2024.169395 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Gain suppression study on LGADs at the CENPA tandem accelerator </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Braun%2C+S">S. Braun</a>, <a href="/search/physics?searchtype=author&query=Buat%2C+Q">Q. Buat</a>, <a href="/search/physics?searchtype=author&query=Ding%2C+J">J. Ding</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Mazza%2C+S+M">S. M. Mazza</a>, <a href="/search/physics?searchtype=author&query=McKinney-Martinez%2C+F">F. McKinney-Martinez</a>, <a href="/search/physics?searchtype=author&query=Molnar%2C+A">A. Molnar</a>, <a href="/search/physics?searchtype=author&query=Lansdell%2C+C">C. Lansdell</a>, <a href="/search/physics?searchtype=author&query=Ott%2C+J">J. Ott</a>, <a href="/search/physics?searchtype=author&query=Seiden%2C+A">A. Seiden</a>, <a href="/search/physics?searchtype=author&query=Schumm%2C+B">B. Schumm</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+Y">Y. Zhao</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="2405.02550v1-abstract-short" style="display: inline;"> Low-Gain Avalanche Detectors (LGADs) are a type of thin silicon detector with a highly doped gain layer that provides moderate internal signal amplification. One recent challenge in the use of LGADs, studied by several research groups, is the gain suppression mechanism for large localized charge deposits. Using the CENPA Tandem accelerator at the University of Washington, the response of the LGADs… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.02550v1-abstract-full').style.display = 'inline'; document.getElementById('2405.02550v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.02550v1-abstract-full" style="display: none;"> Low-Gain Avalanche Detectors (LGADs) are a type of thin silicon detector with a highly doped gain layer that provides moderate internal signal amplification. One recent challenge in the use of LGADs, studied by several research groups, is the gain suppression mechanism for large localized charge deposits. Using the CENPA Tandem accelerator at the University of Washington, the response of the LGADs to MeV-range energy deposits from a proton beam was studied. Two LGAD prototypes and a PIN diode were characterized, and the gain of the devices was determined as a function of bias voltage, incidence beam angle and proton energy. This study was conducted in the scope of the PIONEER experiment, an experiment proposed at the Paul Scherrer Institute to perform high-precision measurements of rare pion decays. %At the center of the experiment, a high-granularity active target (ATAR) will stop the pion and characterize its decay. A range of deposited charge from Minimum Ionizing Particle (MIP, few 10s of KeV) from positrons to several MeV from the stopping pions/muons is expected in PIONEER; the detection and separation of close-by hits in such a wide dynamic range will be a main challenge of the experiment. To achieve this goal, the gain suppression mechanism has to be understood fully. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.02550v1-abstract-full').style.display = 'none'; document.getElementById('2405.02550v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.05505">arXiv:2203.05505</a> <span> [<a href="https://arxiv.org/pdf/2203.05505">pdf</a>, <a href="https://arxiv.org/format/2203.05505">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <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"> Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays in the PIONEER experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=PIONEER+Collaboration"> PIONEER Collaboration</a>, <a href="/search/physics?searchtype=author&query=Altmannshofer%2C+W">W. Altmannshofer</a>, <a href="/search/physics?searchtype=author&query=Binney%2C+H">H. Binney</a>, <a href="/search/physics?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/physics?searchtype=author&query=Bryman%2C+D">D. Bryman</a>, <a href="/search/physics?searchtype=author&query=Caminada%2C+L">L. Caminada</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+S">S. Chen</a>, <a href="/search/physics?searchtype=author&query=Cirigliano%2C+V">V. Cirigliano</a>, <a href="/search/physics?searchtype=author&query=Corrodi%2C+S">S. Corrodi</a>, <a href="/search/physics?searchtype=author&query=Crivellin%2C+A">A. Crivellin</a>, <a href="/search/physics?searchtype=author&query=Cuen-Rochin%2C+S">S. Cuen-Rochin</a>, <a href="/search/physics?searchtype=author&query=Di+Canto%2C+A">A. Di Canto</a>, <a href="/search/physics?searchtype=author&query=Doria%2C+L">L. Doria</a>, <a href="/search/physics?searchtype=author&query=Gaponenko%2C+A">A. Gaponenko</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+A">A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gibbons%2C+L">L. Gibbons</a>, <a href="/search/physics?searchtype=author&query=Glaser%2C+C">C. Glaser</a>, <a href="/search/physics?searchtype=author&query=Godoy%2C+M+E">M. Escobar Godoy</a>, <a href="/search/physics?searchtype=author&query=G%C3%B6ldi%2C+D">D. G枚ldi</a>, <a href="/search/physics?searchtype=author&query=Gori%2C+S">S. Gori</a>, <a href="/search/physics?searchtype=author&query=Gorringe%2C+T">T. Gorringe</a>, <a href="/search/physics?searchtype=author&query=Hertzog%2C+D">D. Hertzog</a>, <a href="/search/physics?searchtype=author&query=Hodge%2C+Z">Z. Hodge</a>, <a href="/search/physics?searchtype=author&query=Hoferichter%2C+M">M. Hoferichter</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+S">S. Ito</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="2203.05505v1-abstract-short" style="display: inline;"> The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are described. Phase I of the PIONEER experiment, which was proposed and approved at Paul Scherrer Institut, aims at measuring the charged-pion branching ratio to electrons vs.\ muons, $R_{e/渭}$, 15 times more precisely than… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.05505v1-abstract-full').style.display = 'inline'; document.getElementById('2203.05505v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.05505v1-abstract-full" style="display: none;"> The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are described. Phase I of the PIONEER experiment, which was proposed and approved at Paul Scherrer Institut, aims at measuring the charged-pion branching ratio to electrons vs.\ muons, $R_{e/渭}$, 15 times more precisely than the current experimental result, reaching the precision of the Standard Model (SM) prediction at 1 part in $10^4$. Considering several inconsistencies between the SM predictions and data pointing towards the potential violation of lepton flavor universality, the PIONEER experiment will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles up to the PeV mass scale. The later phases of the PIONEER experiment aim at improving the experimental precision of the branching ratio of pion beta decay (BRPB), $蟺^+\to 蟺^0 e^+ 谓(纬)$, currently at $1.036(6)\times10^{-8}$, by a factor of three (Phase II) and an order of magnitude (Phase III). Such precise measurements of BRPB will allow for tests of CKM unitarity in light of the Cabibbo Angle Anomaly and the theoretically cleanest extraction of $|V_{ud}|$ at the 0.02\% level, comparable to the deduction from superallowed beta decays. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.05505v1-abstract-full').style.display = 'none'; document.getElementById('2203.05505v1-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 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">contribution to Snowmass 2021 based on the PIONEER proposal (arXiv:2203.01981)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.01981">arXiv:2203.01981</a> <span> [<a href="https://arxiv.org/pdf/2203.01981">pdf</a>, <a href="https://arxiv.org/format/2203.01981">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <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"> PIONEER: Studies of Rare Pion Decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=PIONEER+Collaboration"> PIONEER Collaboration</a>, <a href="/search/physics?searchtype=author&query=Altmannshofer%2C+W">W. Altmannshofer</a>, <a href="/search/physics?searchtype=author&query=Binney%2C+H">H. Binney</a>, <a href="/search/physics?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/physics?searchtype=author&query=Bryman%2C+D">D. Bryman</a>, <a href="/search/physics?searchtype=author&query=Caminada%2C+L">L. Caminada</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+S">S. Chen</a>, <a href="/search/physics?searchtype=author&query=Cirigliano%2C+V">V. Cirigliano</a>, <a href="/search/physics?searchtype=author&query=Corrodi%2C+S">S. Corrodi</a>, <a href="/search/physics?searchtype=author&query=Crivellin%2C+A">A. Crivellin</a>, <a href="/search/physics?searchtype=author&query=Cuen-Rochin%2C+S">S. Cuen-Rochin</a>, <a href="/search/physics?searchtype=author&query=DiCanto%2C+A">A. DiCanto</a>, <a href="/search/physics?searchtype=author&query=Doria%2C+L">L. Doria</a>, <a href="/search/physics?searchtype=author&query=Gaponenko%2C+A">A. Gaponenko</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+A">A. Garcia</a>, <a href="/search/physics?searchtype=author&query=Gibbons%2C+L">L. Gibbons</a>, <a href="/search/physics?searchtype=author&query=Glaser%2C+C">C. Glaser</a>, <a href="/search/physics?searchtype=author&query=Godoy%2C+M+E">M. Escobar Godoy</a>, <a href="/search/physics?searchtype=author&query=G%C3%B6ldi%2C+D">D. G枚ldi</a>, <a href="/search/physics?searchtype=author&query=Gori%2C+S">S. Gori</a>, <a href="/search/physics?searchtype=author&query=Gorringe%2C+T">T. Gorringe</a>, <a href="/search/physics?searchtype=author&query=Hertzog%2C+D">D. Hertzog</a>, <a href="/search/physics?searchtype=author&query=Hodge%2C+Z">Z. Hodge</a>, <a href="/search/physics?searchtype=author&query=Hoferichter%2C+M">M. Hoferichter</a>, <a href="/search/physics?searchtype=author&query=Ito%2C+S">S. Ito</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="2203.01981v2-abstract-short" style="display: inline;"> A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.01981v2-abstract-full').style.display = 'inline'; document.getElementById('2203.01981v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.01981v2-abstract-full" style="display: none;"> A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the charged-pion branching ratio to electrons vs. muons $R_{e/渭}$ is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/渭}$ is known to 1 part in $10^4$, which is 15 times more precise than the current experimental result. An experiment reaching the theoretical accuracy will test lepton flavor universality at an unprecedented level, probing mass scales up to the PeV range. Measurement of pion beta decay, $蟺^+\to 蟺^0 e^+ 谓(纬)$, with 3 to 10-fold improvement in sensitivity, will determine $V_{ud}$ in a theoretically pristine manner and test CKM unitarity, which is very important in light of the recently emerged tensions. In addition, various exotic rare decays involving sterile neutrinos and axions will be searched for with unprecedented sensitivity. The experiment design benefits from experience with the recent PIENU and PEN experiments at TRIUMF and the Paul Scherrer Institut (PSI). Excellent energy and time resolutions, greatly increased calorimeter depth, high-speed detector and electronics response, large solid angle coverage, and complete event reconstruction are all critical aspects of the approach. The PIONEER experiment design includes a 3$蟺$ sr 25 radiation length calorimeter, a segmented low gain avalanche detector stopping target, a positron tracker, and other detectors. Using intense pion beams, and state-of-the-art instrumentation and computational resources, the experiments can be performed at the PSI ring cyclotron. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.01981v2-abstract-full').style.display = 'none'; document.getElementById('2203.01981v2-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 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.10228">arXiv:2110.10228</a> <span> [<a href="https://arxiv.org/pdf/2110.10228">pdf</a>, <a href="https://arxiv.org/format/2110.10228">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"> A Measurement of Proton, Deuteron, Triton and Alpha Particle Emission after Nuclear Muon Capture on Al, Si and Ti with the AlCap Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=AlCap+Collaboration"> AlCap Collaboration</a>, <a href="/search/physics?searchtype=author&query=Edmonds%2C+A">Andrew Edmonds</a>, <a href="/search/physics?searchtype=author&query=Quirk%2C+J">John Quirk</a>, <a href="/search/physics?searchtype=author&query=Wong%2C+M">Ming-Liang Wong</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+D">Damien Alexander</a>, <a href="/search/physics?searchtype=author&query=Bernstein%2C+R+H">Robert H. Bernstein</a>, <a href="/search/physics?searchtype=author&query=Daniel%2C+A">Aji Daniel</a>, <a href="/search/physics?searchtype=author&query=Diociaiuti%2C+E">Eleonora Diociaiuti</a>, <a href="/search/physics?searchtype=author&query=Donghia%2C+R">Raffaella Donghia</a>, <a href="/search/physics?searchtype=author&query=Gillies%2C+E+L">Ewen L. Gillies</a>, <a href="/search/physics?searchtype=author&query=Hungerford%2C+E+V">Ed V. Hungerford</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">Peter Kammel</a>, <a href="/search/physics?searchtype=author&query=Krikler%2C+B+E">Benjamin E. Krikler</a>, <a href="/search/physics?searchtype=author&query=Kuno%2C+Y">Yoshitaka Kuno</a>, <a href="/search/physics?searchtype=author&query=Lancaster%2C+M">Mark Lancaster</a>, <a href="/search/physics?searchtype=author&query=Litchfield%2C+R+P">R. Phillip Litchfield</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+J+P">James P. Miller</a>, <a href="/search/physics?searchtype=author&query=Palladino%2C+A">Anthony Palladino</a>, <a href="/search/physics?searchtype=author&query=Repond%2C+J">Jose Repond</a>, <a href="/search/physics?searchtype=author&query=Sato%2C+A">Akira Sato</a>, <a href="/search/physics?searchtype=author&query=Sarra%2C+I">Ivano Sarra</a>, <a href="/search/physics?searchtype=author&query=Soleti%2C+S+R">Stefano Roberto Soleti</a>, <a href="/search/physics?searchtype=author&query=Tishchenko%2C+V">Vladimir Tishchenko</a>, <a href="/search/physics?searchtype=author&query=Tran%2C+N+H">Nam H. Tran</a>, <a href="/search/physics?searchtype=author&query=Uchida%2C+Y">Yoshi Uchida</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="2110.10228v3-abstract-short" style="display: inline;"> Heavy charged particles after nuclear muon capture are an important nuclear physics background to the muon-to-electron conversion experiments Mu2e and COMET, which will search for charged lepton flavor violation at an unprecedented level of sensitivity. The AlCap experiment measured the yield and energy spectra of protons, deuterons, tritons, and alpha particles emitted after the nuclear capture o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.10228v3-abstract-full').style.display = 'inline'; document.getElementById('2110.10228v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.10228v3-abstract-full" style="display: none;"> Heavy charged particles after nuclear muon capture are an important nuclear physics background to the muon-to-electron conversion experiments Mu2e and COMET, which will search for charged lepton flavor violation at an unprecedented level of sensitivity. The AlCap experiment measured the yield and energy spectra of protons, deuterons, tritons, and alpha particles emitted after the nuclear capture of muons stopped in Al, Si, and Ti in the low energy range relevant for the muon-to-electron conversion experiments. Individual charged particle types were identified in layered silicon detector packages and their initial energy distributions were unfolded from the observed energy spectra. Detailed information on yields and energy spectra for all observed nuclei are presented in the paper. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.10228v3-abstract-full').style.display = 'none'; document.getElementById('2110.10228v3-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 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 19 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/2104.03240">arXiv:2104.03240</a> <span> [<a href="https://arxiv.org/pdf/2104.03240">pdf</a>, <a href="https://arxiv.org/format/2104.03240">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</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/10.1103/PhysRevAccelBeams.24.044002">10.1103/PhysRevAccelBeams.24.044002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Albahri%2C+T">T. Albahri</a>, <a href="/search/physics?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/physics?searchtype=author&query=Badgley%2C+K">K. Badgley</a>, <a href="/search/physics?searchtype=author&query=Bae%C3%9Fler%2C+S">S. Bae脽ler</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+I">I. Bailey</a>, <a href="/search/physics?searchtype=author&query=Baranov%2C+V+A">V. A. Baranov</a>, <a href="/search/physics?searchtype=author&query=Barlas-Yucel%2C+E">E. Barlas-Yucel</a>, <a href="/search/physics?searchtype=author&query=Barrett%2C+T">T. Barrett</a>, <a href="/search/physics?searchtype=author&query=Bedeschi%2C+F">F. Bedeschi</a>, <a href="/search/physics?searchtype=author&query=Berz%2C+M">M. Berz</a>, <a href="/search/physics?searchtype=author&query=Bhattacharya%2C+M">M. Bhattacharya</a>, <a href="/search/physics?searchtype=author&query=Binney%2C+H+P">H. P. Binney</a>, <a href="/search/physics?searchtype=author&query=Bloom%2C+P">P. Bloom</a>, <a href="/search/physics?searchtype=author&query=Bono%2C+J">J. Bono</a>, <a href="/search/physics?searchtype=author&query=Bottalico%2C+E">E. Bottalico</a>, <a href="/search/physics?searchtype=author&query=Bowcock%2C+T">T. Bowcock</a>, <a href="/search/physics?searchtype=author&query=Cantatore%2C+G">G. Cantatore</a>, <a href="/search/physics?searchtype=author&query=Carey%2C+R+M">R. M. Carey</a>, <a href="/search/physics?searchtype=author&query=Casey%2C+B+C+K">B. C. K. Casey</a>, <a href="/search/physics?searchtype=author&query=Cauz%2C+D">D. Cauz</a>, <a href="/search/physics?searchtype=author&query=Chakraborty%2C+R">R. Chakraborty</a>, <a href="/search/physics?searchtype=author&query=Chang%2C+S+P">S. P. Chang</a>, <a href="/search/physics?searchtype=author&query=Chapelain%2C+A">A. Chapelain</a>, <a href="/search/physics?searchtype=author&query=Charity%2C+S">S. Charity</a>, <a href="/search/physics?searchtype=author&query=Chislett%2C+R">R. Chislett</a> , et al. (152 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="2104.03240v2-abstract-short" style="display: inline;"> This paper presents the beam dynamics systematic corrections and their uncertainties for the Run-1 data set of the Fermilab Muon g-2 Experiment. Two corrections to the measured muon precession frequency $蠅_a^m$ are associated with well-known effects owing to the use of electrostatic quadrupole (ESQ) vertical focusing in the storage ring. An average vertically oriented motional magnetic field is fe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.03240v2-abstract-full').style.display = 'inline'; document.getElementById('2104.03240v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.03240v2-abstract-full" style="display: none;"> This paper presents the beam dynamics systematic corrections and their uncertainties for the Run-1 data set of the Fermilab Muon g-2 Experiment. Two corrections to the measured muon precession frequency $蠅_a^m$ are associated with well-known effects owing to the use of electrostatic quadrupole (ESQ) vertical focusing in the storage ring. An average vertically oriented motional magnetic field is felt by relativistic muons passing transversely through the radial electric field components created by the ESQ system. The correction depends on the stored momentum distribution and the tunes of the ring, which has relatively weak vertical focusing. Vertical betatron motions imply that the muons do not orbit the ring in a plane exactly orthogonal to the vertical magnetic field direction. A correction is necessary to account for an average pitch angle associated with their trajectories. A third small correction is necessary because muons that escape the ring during the storage time are slightly biased in initial spin phase compared to the parent distribution. Finally, because two high-voltage resistors in the ESQ network had longer than designed RC time constants, the vertical and horizontal centroids and envelopes of the stored muon beam drifted slightly, but coherently, during each storage ring fill. This led to the discovery of an important phase-acceptance relationship that requires a correction. The sum of the corrections to $蠅_a^m$ is 0.50 $\pm$ 0.09 ppm; the uncertainty is small compared to the 0.43 ppm statistical precision of $蠅_a^m$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.03240v2-abstract-full').style.display = 'none'; document.getElementById('2104.03240v2-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 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 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">35 pages, 29 figures. Accepted by Phys. Rev. Accel. Beams</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-21-133-E </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Accel. Beams 24, 044002 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1611.03180">arXiv:1611.03180</a> <span> [<a href="https://arxiv.org/pdf/1611.03180">pdf</a>, <a href="https://arxiv.org/format/1611.03180">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/10.1088/1748-0221/12/01/P01009">10.1088/1748-0221/12/01/P01009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design and performance of SiPM-based readout of PbF2 crystals for high-rate, precision timing applications </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kaspar%2C+J">J. Kaspar</a>, <a href="/search/physics?searchtype=author&query=Fienberg%2C+A+T">A. T. Fienberg</a>, <a href="/search/physics?searchtype=author&query=Hertzog%2C+D+W">D. W. Hertzog</a>, <a href="/search/physics?searchtype=author&query=Huehn%2C+M+A">M. A. Huehn</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Khaw%2C+K+S">K. S. Khaw</a>, <a href="/search/physics?searchtype=author&query=Peterson%2C+D+A">D. A. Peterson</a>, <a href="/search/physics?searchtype=author&query=Smith%2C+M+W">M. W. Smith</a>, <a href="/search/physics?searchtype=author&query=Van+Wechel%2C+T+D">T. D. Van Wechel</a>, <a href="/search/physics?searchtype=author&query=Chapelain%2C+A">A. Chapelain</a>, <a href="/search/physics?searchtype=author&query=Gibbons%2C+L+K">L. K. Gibbons</a>, <a href="/search/physics?searchtype=author&query=Sweigart%2C+D+A">D. A. Sweigart</a>, <a href="/search/physics?searchtype=author&query=Ferrari%2C+C">C. Ferrari</a>, <a href="/search/physics?searchtype=author&query=Fioretti%2C+A">A. Fioretti</a>, <a href="/search/physics?searchtype=author&query=Gabbanini%2C+C">C. Gabbanini</a>, <a href="/search/physics?searchtype=author&query=Venanzoni%2C+G">G. Venanzoni</a>, <a href="/search/physics?searchtype=author&query=Iacovacci%2C+M">M. Iacovacci</a>, <a href="/search/physics?searchtype=author&query=Mastroianni%2C+S">S. Mastroianni</a>, <a href="/search/physics?searchtype=author&query=Giovanetti%2C+K">K. Giovanetti</a>, <a href="/search/physics?searchtype=author&query=Gohn%2C+W">W. Gohn</a>, <a href="/search/physics?searchtype=author&query=Gorringe%2C+T">T. Gorringe</a>, <a href="/search/physics?searchtype=author&query=Pocanic%2C+D">D. Pocanic</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="1611.03180v2-abstract-short" style="display: inline;"> We have developed a custom amplifier board coupled to a large-format 16-channel Hamamatsu silicon photomultiplier device for use as the light sensor for the electromagnetic calorimeters in the Muon g-2 experiment at Fermilab. The calorimeter absorber is an array of lead-fluoride crystals, which produces short-duration Cherenkov light. The detector sits in the high magnetic field of the muon storag… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.03180v2-abstract-full').style.display = 'inline'; document.getElementById('1611.03180v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1611.03180v2-abstract-full" style="display: none;"> We have developed a custom amplifier board coupled to a large-format 16-channel Hamamatsu silicon photomultiplier device for use as the light sensor for the electromagnetic calorimeters in the Muon g-2 experiment at Fermilab. The calorimeter absorber is an array of lead-fluoride crystals, which produces short-duration Cherenkov light. The detector sits in the high magnetic field of the muon storage ring. The SiPMs selected, and their accompanying custom electronics, must preserve the short pulse shape, have high quantum efficiency, be non-magnetic, exhibit gain stability under varying rate conditions, and cover a fairly large fraction of the crystal exit surface area. We describe an optimized design that employs the new-generation of thru-silicon via devices. The performance is documented in a series of bench and beam tests. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.03180v2-abstract-full').style.display = 'none'; document.getElementById('1611.03180v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 December, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">In version 2, simplified schematics of the SiPM board was fixed, and high rate test redone</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-16-516-E-PPD </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.00913">arXiv:1502.00913</a> <span> [<a href="https://arxiv.org/pdf/1502.00913">pdf</a>, <a href="https://arxiv.org/format/1502.00913">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/PhysRevC.91.055502">10.1103/PhysRevC.91.055502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Formation Rate of Muonic Hydrogen Molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=MuCap+Collaboration"> MuCap Collaboration</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+V+A">V. A. Andreev</a>, <a href="/search/physics?searchtype=author&query=Banks%2C+T+I">T. I. Banks</a>, <a href="/search/physics?searchtype=author&query=Carey%2C+R+M">R. M. Carey</a>, <a href="/search/physics?searchtype=author&query=Case%2C+T+A">T. A. Case</a>, <a href="/search/physics?searchtype=author&query=Clayton%2C+S+M">S. M. Clayton</a>, <a href="/search/physics?searchtype=author&query=Crowe%2C+K+M">K. M. Crowe</a>, <a href="/search/physics?searchtype=author&query=Deutsch%2C+J">J. Deutsch</a>, <a href="/search/physics?searchtype=author&query=Egger%2C+J">J. Egger</a>, <a href="/search/physics?searchtype=author&query=Freedman%2C+S+J">S. J. Freedman</a>, <a href="/search/physics?searchtype=author&query=Ganzha%2C+V+A">V. A. Ganzha</a>, <a href="/search/physics?searchtype=author&query=Gorringe%2C+T">T. Gorringe</a>, <a href="/search/physics?searchtype=author&query=Gray%2C+F+E">F. E. Gray</a>, <a href="/search/physics?searchtype=author&query=Hertzog%2C+D+W">D. W. Hertzog</a>, <a href="/search/physics?searchtype=author&query=Hildebrandt%2C+M">M. Hildebrandt</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kiburg%2C+B">B. Kiburg</a>, <a href="/search/physics?searchtype=author&query=Knaack%2C+S">S. Knaack</a>, <a href="/search/physics?searchtype=author&query=Kravtsov%2C+P+A">P. A. Kravtsov</a>, <a href="/search/physics?searchtype=author&query=Krivshich%2C+A+G">A. G. Krivshich</a>, <a href="/search/physics?searchtype=author&query=Lauss%2C+B">B. Lauss</a>, <a href="/search/physics?searchtype=author&query=Lynch%2C+K+R">K. R. Lynch</a>, <a href="/search/physics?searchtype=author&query=Maev%2C+E+M">E. M. Maev</a>, <a href="/search/physics?searchtype=author&query=Maev%2C+O+E">O. E. Maev</a>, <a href="/search/physics?searchtype=author&query=Mulhauser%2C+F">F. Mulhauser</a> , et al. (11 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="1502.00913v1-abstract-short" style="display: inline;"> Background: The rate 位_pp渭 characterizes the formation of pp渭 molecules in collisions of muonic p渭 atoms with hydrogen. In measurements of the basic weak muon capture reaction on the proton to determine the pseudoscalar coupling g_P, capture occurs from both atomic and molecular states. Thus knowledge of 位_pp渭 is required for a correct interpretation of these experiments. Purpose: Recently the M… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.00913v1-abstract-full').style.display = 'inline'; document.getElementById('1502.00913v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.00913v1-abstract-full" style="display: none;"> Background: The rate 位_pp渭 characterizes the formation of pp渭 molecules in collisions of muonic p渭 atoms with hydrogen. In measurements of the basic weak muon capture reaction on the proton to determine the pseudoscalar coupling g_P, capture occurs from both atomic and molecular states. Thus knowledge of 位_pp渭 is required for a correct interpretation of these experiments. Purpose: Recently the MuCap experiment has measured the capture rate 螞_S from the singlet p渭 atom, employing a low density active target to suppress pp渭 formation (PRL 110, 12504 (2013)). Nevertheless, given the unprecedented precision of this experiment, the existing experimental knowledge in 位_pp渭 had to be improved. Method: The MuCap experiment derived the weak capture rate from the muon disappearance rate in ultra-pure hydrogen. By doping the hydrogen with 20 ppm of argon, a competing process to pp渭 formation was introduced, which allowed the extraction of 位_pp渭 from the observed time distribution of decay electrons. Results: The pp渭 formation rate was measured as 位_pp渭= (2.01 +- 0.06(stat) +- 0.03(sys)) 10^6 s^-1. This result updates the 位_pp渭 value used in the above mentioned MuCap publication. Conclusions: The 2.5x higher precision compared to earlier experiments and the fact that the measurement was performed at nearly identical conditions to the main data taking, reduces the uncertainty induced by 位_pp渭 to a minor contribution to the overall uncertainty of 螞_S and g_P, as determined in MuCap. Our final value for 位_pp渭 shifts 螞_S and g_P by less than one tenth of their respective uncertainties compared to our results published earlier. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.00913v1-abstract-full').style.display = 'none'; document.getElementById('1502.00913v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 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">12 pages, 6 figures, to be submitted to Phys. Rev. C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 91, 055502 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1501.06858">arXiv:1501.06858</a> <span> [<a href="https://arxiv.org/pdf/1501.06858">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> <p class="title is-5 mathjax"> Muon (g-2) Technical Design Report </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Grange%2C+J">J. Grange</a>, <a href="/search/physics?searchtype=author&query=Guarino%2C+V">V. Guarino</a>, <a href="/search/physics?searchtype=author&query=Winter%2C+P">P. Winter</a>, <a href="/search/physics?searchtype=author&query=Wood%2C+K">K. Wood</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+H">H. Zhao</a>, <a href="/search/physics?searchtype=author&query=Carey%2C+R+M">R. M. Carey</a>, <a href="/search/physics?searchtype=author&query=Gastler%2C+D">D. Gastler</a>, <a href="/search/physics?searchtype=author&query=Hazen%2C+E">E. Hazen</a>, <a href="/search/physics?searchtype=author&query=Kinnaird%2C+N">N. Kinnaird</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+J+P">J. P. Miller</a>, <a href="/search/physics?searchtype=author&query=Mott%2C+J">J. Mott</a>, <a href="/search/physics?searchtype=author&query=Roberts%2C+B+L">B. L. Roberts</a>, <a href="/search/physics?searchtype=author&query=Benante%2C+J">J. Benante</a>, <a href="/search/physics?searchtype=author&query=Crnkovic%2C+J">J. Crnkovic</a>, <a href="/search/physics?searchtype=author&query=Morse%2C+W+M">W. M. Morse</a>, <a href="/search/physics?searchtype=author&query=Sayed%2C+H">H. Sayed</a>, <a href="/search/physics?searchtype=author&query=Tishchenko%2C+V">V. Tishchenko</a>, <a href="/search/physics?searchtype=author&query=Druzhinin%2C+V+P">V. P. Druzhinin</a>, <a href="/search/physics?searchtype=author&query=Khazin%2C+B+I">B. I. Khazin</a>, <a href="/search/physics?searchtype=author&query=Koop%2C+I+A">I. A. Koop</a>, <a href="/search/physics?searchtype=author&query=Logashenko%2C+I">I. Logashenko</a>, <a href="/search/physics?searchtype=author&query=Shatunov%2C+Y+M">Y. M. Shatunov</a>, <a href="/search/physics?searchtype=author&query=Solodov%2C+E">E. Solodov</a>, <a href="/search/physics?searchtype=author&query=Korostelev%2C+M">M. Korostelev</a>, <a href="/search/physics?searchtype=author&query=Newton%2C+D">D. Newton</a> , et al. (176 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="1501.06858v2-abstract-short" style="display: inline;"> The Muon (g-2) Experiment, E989 at Fermilab, will measure the muon anomalous magnetic moment a factor-of-four more precisely than was done in E821 at the Brookhaven National Laboratory AGS. The E821 result appears to be greater than the Standard-Model prediction by more than three standard deviations. When combined with expected improvement in the Standard-Model hadronic contributions, E989 should… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.06858v2-abstract-full').style.display = 'inline'; document.getElementById('1501.06858v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1501.06858v2-abstract-full" style="display: none;"> The Muon (g-2) Experiment, E989 at Fermilab, will measure the muon anomalous magnetic moment a factor-of-four more precisely than was done in E821 at the Brookhaven National Laboratory AGS. The E821 result appears to be greater than the Standard-Model prediction by more than three standard deviations. When combined with expected improvement in the Standard-Model hadronic contributions, E989 should be able to determine definitively whether or not the E821 result is evidence for physics beyond the Standard Model. After a review of the physics motivation and the basic technique, which will use the muon storage ring built at BNL and now relocated to Fermilab, the design of the new experiment is presented. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-2/3 approval. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.06858v2-abstract-full').style.display = 'none'; document.getElementById('1501.06858v2-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 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">666 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-FN-0992-E </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1501.05241">arXiv:1501.05241</a> <span> [<a href="https://arxiv.org/pdf/1501.05241">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> <p class="title is-5 mathjax"> Mu2e Technical Design Report </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bartoszek%2C+L">L. Bartoszek</a>, <a href="/search/physics?searchtype=author&query=Barnes%2C+E">E. Barnes</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+J+P">J. P. Miller</a>, <a href="/search/physics?searchtype=author&query=Mott%2C+J">J. Mott</a>, <a href="/search/physics?searchtype=author&query=Palladino%2C+A">A. Palladino</a>, <a href="/search/physics?searchtype=author&query=Quirk%2C+J">J. Quirk</a>, <a href="/search/physics?searchtype=author&query=Roberts%2C+B+L">B. L. Roberts</a>, <a href="/search/physics?searchtype=author&query=Crnkovic%2C+J">J. Crnkovic</a>, <a href="/search/physics?searchtype=author&query=Polychronakos%2C+V">V. Polychronakos</a>, <a href="/search/physics?searchtype=author&query=Tishchenko%2C+V">V. Tishchenko</a>, <a href="/search/physics?searchtype=author&query=Yamin%2C+P">P. Yamin</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+C+-">C. -h. Cheng</a>, <a href="/search/physics?searchtype=author&query=Echenard%2C+B">B. Echenard</a>, <a href="/search/physics?searchtype=author&query=Flood%2C+K">K. Flood</a>, <a href="/search/physics?searchtype=author&query=Hitlin%2C+D+G">D. G. Hitlin</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+J+H">J. H. Kim</a>, <a href="/search/physics?searchtype=author&query=Miyashita%2C+T+S">T. S. Miyashita</a>, <a href="/search/physics?searchtype=author&query=Porter%2C+F+C">F. C. Porter</a>, <a href="/search/physics?searchtype=author&query=R%C3%B6hrken%2C+M">M. R枚hrken</a>, <a href="/search/physics?searchtype=author&query=Trevor%2C+J">J. Trevor</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+R+-">R. -Y. Zhu</a>, <a href="/search/physics?searchtype=author&query=Heckmaier%2C+E">E. Heckmaier</a>, <a href="/search/physics?searchtype=author&query=Kang%2C+T+I">T. I. Kang</a>, <a href="/search/physics?searchtype=author&query=Lim%2C+G">G. Lim</a>, <a href="/search/physics?searchtype=author&query=Molzon%2C+W">W. Molzon</a> , et al. (238 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="1501.05241v2-abstract-short" style="display: inline;"> The Mu2e experiment at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the L… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.05241v2-abstract-full').style.display = 'inline'; document.getElementById('1501.05241v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1501.05241v2-abstract-full" style="display: none;"> The Mu2e experiment at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the LHC. We describe herein the preliminary design of the proposed Mu2e experiment. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-2 approval. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.05241v2-abstract-full').style.display = 'none'; document.getElementById('1501.05241v2-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 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">compressed file, 888 pages, 621 figures, 126 tables; full resolution available at http://mu2e.fnal.gov; corrected typo in background summary, Table 3.4</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Fermilab-TM-2594 , Fermilab-DESIGN-2014-1 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1412.5525">arXiv:1412.5525</a> <span> [<a href="https://arxiv.org/pdf/1412.5525">pdf</a>, <a href="https://arxiv.org/format/1412.5525">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.2015.02.028">10.1016/j.nima.2015.02.028 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Studies of an array of PbF2 Cherenkov crystals with large-area SiPM readout </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fienberg%2C+A+T">A. T. Fienberg</a>, <a href="/search/physics?searchtype=author&query=Alonzi%2C+L+P">L. P. Alonzi</a>, <a href="/search/physics?searchtype=author&query=Anastasi%2C+A">A. Anastasi</a>, <a href="/search/physics?searchtype=author&query=Bjorkquist%2C+R">R. Bjorkquist</a>, <a href="/search/physics?searchtype=author&query=Cauz%2C+D">D. Cauz</a>, <a href="/search/physics?searchtype=author&query=Fatemi%2C+R">R. Fatemi</a>, <a href="/search/physics?searchtype=author&query=Ferrari%2C+C">C. Ferrari</a>, <a href="/search/physics?searchtype=author&query=Fioretti%2C+A">A. Fioretti</a>, <a href="/search/physics?searchtype=author&query=Frankenthal%2C+A">A. Frankenthal</a>, <a href="/search/physics?searchtype=author&query=Gabbanini%2C+C">C. Gabbanini</a>, <a href="/search/physics?searchtype=author&query=Gibbons%2C+L+K">L. K. Gibbons</a>, <a href="/search/physics?searchtype=author&query=Giovanetti%2C+K">K. Giovanetti</a>, <a href="/search/physics?searchtype=author&query=Goadhouse%2C+S+D">S. D. Goadhouse</a>, <a href="/search/physics?searchtype=author&query=Gohn%2C+W+P">W. P. Gohn</a>, <a href="/search/physics?searchtype=author&query=Gorringe%2C+T+P">T. P. Gorringe</a>, <a href="/search/physics?searchtype=author&query=Hertzog%2C+D+W">D. W. Hertzog</a>, <a href="/search/physics?searchtype=author&query=Iacovacci%2C+M">M. Iacovacci</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kaspar%2C+J">J. Kaspar</a>, <a href="/search/physics?searchtype=author&query=Kiburg%2C+B">B. Kiburg</a>, <a href="/search/physics?searchtype=author&query=Li%2C+L">L. Li</a>, <a href="/search/physics?searchtype=author&query=Mastroianni%2C+S">S. Mastroianni</a>, <a href="/search/physics?searchtype=author&query=Pauletta%2C+G">G. Pauletta</a>, <a href="/search/physics?searchtype=author&query=Peterson%2C+D+A">D. A. Peterson</a>, <a href="/search/physics?searchtype=author&query=Pocanic%2C+D">D. Pocanic</a> , et al. (8 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="1412.5525v2-abstract-short" style="display: inline;"> The electromagnetic calorimeter for the new muon (g-2) experiment at Fermilab will consist of arrays of PbF2 Cherenkov crystals read out by large-area silicon photo-multiplier (SiPM) sensors. We report here on measurements and simulations using 2.0 -- 4.5 GeV electrons with a 28-element prototype array. All data were obtained using fast waveform digitizers to accurately capture signal pulse shapes… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.5525v2-abstract-full').style.display = 'inline'; document.getElementById('1412.5525v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1412.5525v2-abstract-full" style="display: none;"> The electromagnetic calorimeter for the new muon (g-2) experiment at Fermilab will consist of arrays of PbF2 Cherenkov crystals read out by large-area silicon photo-multiplier (SiPM) sensors. We report here on measurements and simulations using 2.0 -- 4.5 GeV electrons with a 28-element prototype array. All data were obtained using fast waveform digitizers to accurately capture signal pulse shapes versus energy, impact position, angle, and crystal wrapping. The SiPMs were gain matched using a laser-based calibration system, which also provided a stabilization procedure that allowed gain correction to a level of 1e-4 per hour. After accounting for longitudinal fluctuation losses, those crystals wrapped in a white, diffusive wrapping exhibited an energy resolution sigma/E of (3.4 +- 0.1) % per sqrt(E/GeV), while those wrapped in a black, absorptive wrapping had (4.6 +- 0.3) % per sqrt(E/GeV). The white-wrapped crystals---having nearly twice the total light collection---display a generally wider and impact-position-dependent pulse shape owing to the dynamics of the light propagation, in comparison to the black-wrapped crystals, which have a narrower pulse shape that is insensitive to impact position. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.5525v2-abstract-full').style.display = 'none'; document.getElementById('1412.5525v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 December, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">14 pages, 19 figures, accepted to Nucl.Instrum.Meth. A. In v2, edited Figures 14,15, and 17 for clarity, improved explanation of energy resolution systematics, added reference to SiPM</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-14-526-E-PPD </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.2853">arXiv:1405.2853</a> <span> [<a href="https://arxiv.org/pdf/1405.2853">pdf</a>, <a href="https://arxiv.org/format/1405.2853">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/10.1140/epja/i2014-14163-1">10.1140/epja/i2014-14163-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A high-pressure hydrogen time projection chamber for the MuCap experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Egger%2C+J">J. Egger</a>, <a href="/search/physics?searchtype=author&query=Fahrni%2C+D">D. Fahrni</a>, <a href="/search/physics?searchtype=author&query=Hildebrandt%2C+M">M. Hildebrandt</a>, <a href="/search/physics?searchtype=author&query=Hofer%2C+A">A. Hofer</a>, <a href="/search/physics?searchtype=author&query=Meier%2C+L">L. Meier</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+V+A">V. A. Andreev</a>, <a href="/search/physics?searchtype=author&query=Banks%2C+T+I">T. I. Banks</a>, <a href="/search/physics?searchtype=author&query=Clayton%2C+S+M">S. M. Clayton</a>, <a href="/search/physics?searchtype=author&query=Ganzha%2C+V+A">V. A. Ganzha</a>, <a href="/search/physics?searchtype=author&query=Gray%2C+F+E">F. E. Gray</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kiburg%2C+B">B. Kiburg</a>, <a href="/search/physics?searchtype=author&query=Kravtsov%2C+P+A">P. A. Kravtsov</a>, <a href="/search/physics?searchtype=author&query=Krivshich%2C+A+G">A. G. Krivshich</a>, <a href="/search/physics?searchtype=author&query=Lauss%2C+B">B. Lauss</a>, <a href="/search/physics?searchtype=author&query=Maev%2C+E+M">E. M. Maev</a>, <a href="/search/physics?searchtype=author&query=Maev%2C+O+E">O. E. Maev</a>, <a href="/search/physics?searchtype=author&query=Petrov%2C+G">G. Petrov</a>, <a href="/search/physics?searchtype=author&query=Semenchuk%2C+G+G">G. G. Semenchuk</a>, <a href="/search/physics?searchtype=author&query=Vasilyev%2C+A+A">A. A. Vasilyev</a>, <a href="/search/physics?searchtype=author&query=Vorobyov%2C+A+A">A. A. Vorobyov</a>, <a href="/search/physics?searchtype=author&query=Vznuzdaev%2C+M+E">M. E. Vznuzdaev</a>, <a href="/search/physics?searchtype=author&query=Winter%2C+P">P. Winter</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="1405.2853v2-abstract-short" style="display: inline;"> The MuCap experiment at the Paul Scherrer Institute performed a high-precision measurement of the rate of the basic electroweak process of nuclear muon capture by the proton, $渭^- + p \rightarrow n + 谓_渭$. The experimental approach was based on the use of a time projection chamber (TPC) that operated in pure hydrogen gas at a pressure of 10 bar and functioned as an active muon stopping target. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.2853v2-abstract-full').style.display = 'inline'; document.getElementById('1405.2853v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.2853v2-abstract-full" style="display: none;"> The MuCap experiment at the Paul Scherrer Institute performed a high-precision measurement of the rate of the basic electroweak process of nuclear muon capture by the proton, $渭^- + p \rightarrow n + 谓_渭$. The experimental approach was based on the use of a time projection chamber (TPC) that operated in pure hydrogen gas at a pressure of 10 bar and functioned as an active muon stopping target. The TPC detected the tracks of individual muon arrivals in three dimensions, while the trajectories of outgoing decay (Michel) electrons were measured by two surrounding wire chambers and a plastic scintillation hodoscope. The muon and electron detectors together enabled a precise measurement of the $渭p$ atom's lifetime, from which the nuclear muon capture rate was deduced. The TPC was also used to monitor the purity of the hydrogen gas by detecting the nuclear recoils that follow muon capture by elemental impurities. This paper describes the TPC design and performance in detail. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.2853v2-abstract-full').style.display = 'none'; document.getElementById('1405.2853v2-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 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 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">15 pages, 13 figures, to be submitted to Eur. Phys. J. A; clarified section 3.1.2 and made minor stylistic corrections for Eur. Phys. J. A requirements</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.3251">arXiv:1404.3251</a> <span> [<a href="https://arxiv.org/pdf/1404.3251">pdf</a>, <a href="https://arxiv.org/format/1404.3251">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/10.1088/1748-0221/9/07/P07029">10.1088/1748-0221/9/07/P07029 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design and operation of a cryogenic charge-integrating preamplifier for the MuSun experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ryan%2C+R+A">R. A. Ryan</a>, <a href="/search/physics?searchtype=author&query=Wauters%2C+F">F. Wauters</a>, <a href="/search/physics?searchtype=author&query=Gray%2C+F+E">F. E. Gray</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Nadtochy%2C+A">A. Nadtochy</a>, <a href="/search/physics?searchtype=author&query=Peterson%2C+D">D. Peterson</a>, <a href="/search/physics?searchtype=author&query=van+Wechel%2C+T">T. van Wechel</a>, <a href="/search/physics?searchtype=author&query=Gross%2C+E">E. Gross</a>, <a href="/search/physics?searchtype=author&query=Gubanich%2C+M">M. Gubanich</a>, <a href="/search/physics?searchtype=author&query=Kochenda%2C+L">L. Kochenda</a>, <a href="/search/physics?searchtype=author&query=Kravtsov%2C+P">P. Kravtsov</a>, <a href="/search/physics?searchtype=author&query=Murray%2C+M+H">M. H. Murray</a>, <a href="/search/physics?searchtype=author&query=Orozco%2C+D">D. Orozco</a>, <a href="/search/physics?searchtype=author&query=Osofsky%2C+R">R. Osofsky</a>, <a href="/search/physics?searchtype=author&query=Petrov%2C+G+E">G. E. Petrov</a>, <a href="/search/physics?searchtype=author&query=Phillips%2C+J+D">J. D. Phillips</a>, <a href="/search/physics?searchtype=author&query=Stroud%2C+J">J. Stroud</a>, <a href="/search/physics?searchtype=author&query=Trofimov%2C+V">V. Trofimov</a>, <a href="/search/physics?searchtype=author&query=Vasilyev%2C+A">A. Vasilyev</a>, <a href="/search/physics?searchtype=author&query=Vznuzdaev%2C+M">M. Vznuzdaev</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="1404.3251v2-abstract-short" style="display: inline;"> The central detector in the MuSun experiment is a pad-plane time projection ionization chamber that operates without gas amplification in deuterium at 31 K; it is used to measure the rate of the muon capture process $渭^- + d \rightarrow n + n + 谓_渭$. A new charge-sensitive preamplifier, operated at 140 K, has been developed for this detector. It achieved a resolution of 4.5 keV(D$_2$) or 120… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.3251v2-abstract-full').style.display = 'inline'; document.getElementById('1404.3251v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.3251v2-abstract-full" style="display: none;"> The central detector in the MuSun experiment is a pad-plane time projection ionization chamber that operates without gas amplification in deuterium at 31 K; it is used to measure the rate of the muon capture process $渭^- + d \rightarrow n + n + 谓_渭$. A new charge-sensitive preamplifier, operated at 140 K, has been developed for this detector. It achieved a resolution of 4.5 keV(D$_2$) or 120 $e^-$ RMS with zero detector capacitance at 1.1 $渭$s integration time in laboratory tests. In the experimental environment, the electronic resolution is 10 keV(D$_2$) or 250 $e^-$ RMS at a 0.5 $渭$s integration time. The excellent energy resolution of this amplifier has enabled discrimination between signals from muon-catalyzed fusion and muon capture on chemical impurities, which will precisely determine systematic corrections due to these processes. It is also expected to improve the muon tracking and determination of the stopping location. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.3251v2-abstract-full').style.display = 'none'; document.getElementById('1404.3251v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 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">18 pages + title page, 13 figures, to be submitted to JINST; minor corrections, added one reference, updated author list</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.7019">arXiv:1211.7019</a> <span> [<a href="https://arxiv.org/pdf/1211.7019">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Mu2e Conceptual Design Report </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Project%2C+T+M">The Mu2e Project</a>, <a href="/search/physics?searchtype=author&query=Collaboration"> Collaboration</a>, <a href="/search/physics?searchtype=author&query=%3A"> :</a>, <a href="/search/physics?searchtype=author&query=Abrams%2C+R+J">R. J. Abrams</a>, <a href="/search/physics?searchtype=author&query=Alezander%2C+D">D. Alezander</a>, <a href="/search/physics?searchtype=author&query=Ambrosio%2C+G">G. Ambrosio</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+N">N. Andreev</a>, <a href="/search/physics?searchtype=author&query=Ankenbrandt%2C+C+M">C. M. Ankenbrandt</a>, <a href="/search/physics?searchtype=author&query=Asner%2C+D+M">D. M. Asner</a>, <a href="/search/physics?searchtype=author&query=Arnold%2C+D">D. Arnold</a>, <a href="/search/physics?searchtype=author&query=Artikov%2C+A">A. Artikov</a>, <a href="/search/physics?searchtype=author&query=Barnes%2C+E">E. Barnes</a>, <a href="/search/physics?searchtype=author&query=Bartoszek%2C+L">L. Bartoszek</a>, <a href="/search/physics?searchtype=author&query=Bernstein%2C+R+H">R. H. Bernstein</a>, <a href="/search/physics?searchtype=author&query=Biery%2C+K">K. Biery</a>, <a href="/search/physics?searchtype=author&query=Biliyar%2C+V">V. Biliyar</a>, <a href="/search/physics?searchtype=author&query=Bonicalzi%2C+R">R. Bonicalzi</a>, <a href="/search/physics?searchtype=author&query=Bossert%2C+R">R. Bossert</a>, <a href="/search/physics?searchtype=author&query=Bowden%2C+M">M. Bowden</a>, <a href="/search/physics?searchtype=author&query=Brandt%2C+J">J. Brandt</a>, <a href="/search/physics?searchtype=author&query=Brown%2C+D+N">D. N. Brown</a>, <a href="/search/physics?searchtype=author&query=Budagov%2C+J">J. Budagov</a>, <a href="/search/physics?searchtype=author&query=Buehler%2C+M">M. Buehler</a>, <a href="/search/physics?searchtype=author&query=Burov%2C+A">A. Burov</a>, <a href="/search/physics?searchtype=author&query=Carcagno%2C+R">R. Carcagno</a> , et al. (203 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="1211.7019v1-abstract-short" style="display: inline;"> Mu2e at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the LHC. We describe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.7019v1-abstract-full').style.display = 'inline'; document.getElementById('1211.7019v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.7019v1-abstract-full" style="display: none;"> Mu2e at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the LHC. We describe herein the conceptual design of the proposed Mu2e experiment. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-1 approval, which was granted July 11, 2012. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.7019v1-abstract-full').style.display = 'none'; document.getElementById('1211.7019v1-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 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">562 pages, 339 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Fermilab-TM-2545 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.0960">arXiv:1211.0960</a> <span> [<a href="https://arxiv.org/pdf/1211.0960">pdf</a>, <a href="https://arxiv.org/format/1211.0960">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div 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.87.052003">10.1103/PhysRevD.87.052003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Detailed Report of the MuLan Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Tishchenko%2C+V">V. Tishchenko</a>, <a href="/search/physics?searchtype=author&query=Battu%2C+S">S. Battu</a>, <a href="/search/physics?searchtype=author&query=Carey%2C+R+M">R. M. Carey</a>, <a href="/search/physics?searchtype=author&query=Chitwood%2C+D+B">D. B. Chitwood</a>, <a href="/search/physics?searchtype=author&query=Crnkovic%2C+J">J. Crnkovic</a>, <a href="/search/physics?searchtype=author&query=Debevec%2C+P+T">P. T. Debevec</a>, <a href="/search/physics?searchtype=author&query=Dhamija%2C+S">S. Dhamija</a>, <a href="/search/physics?searchtype=author&query=Earle%2C+W">W. Earle</a>, <a href="/search/physics?searchtype=author&query=Gafarov%2C+A">A. Gafarov</a>, <a href="/search/physics?searchtype=author&query=Giovanetti%2C+K">K. Giovanetti</a>, <a href="/search/physics?searchtype=author&query=Gorringe%2C+T+P">T. P. Gorringe</a>, <a href="/search/physics?searchtype=author&query=Gray%2C+F+E">F. E. Gray</a>, <a href="/search/physics?searchtype=author&query=Hartwig%2C+Z">Z. Hartwig</a>, <a href="/search/physics?searchtype=author&query=Hertzog%2C+D+W">D. W. Hertzog</a>, <a href="/search/physics?searchtype=author&query=Johnson%2C+B">B. Johnson</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kiburg%2C+B">B. Kiburg</a>, <a href="/search/physics?searchtype=author&query=Kizilgul%2C+S">S. Kizilgul</a>, <a href="/search/physics?searchtype=author&query=Kunkle%2C+J">J. Kunkle</a>, <a href="/search/physics?searchtype=author&query=Lauss%2C+B">B. Lauss</a>, <a href="/search/physics?searchtype=author&query=Logashenko%2C+I">I. Logashenko</a>, <a href="/search/physics?searchtype=author&query=Lynch%2C+K+R">K. R. Lynch</a>, <a href="/search/physics?searchtype=author&query=McNabb%2C+R">R. McNabb</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+J+P">J. P. Miller</a>, <a href="/search/physics?searchtype=author&query=Mulhauser%2C+F">F. Mulhauser</a> , et al. (8 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="1211.0960v1-abstract-short" style="display: inline;"> We present a detailed report of the method, setup, analysis and results of a precision measurement of the positive muon lifetime. The experiment was conducted at the Paul Scherrer Institute using a time-structured, nearly 100%-polarized, surface muon beam and a segmented, fast-timing, plastic scintillator array. The measurement employed two target arrangements; a magnetized ferromagnetic target wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.0960v1-abstract-full').style.display = 'inline'; document.getElementById('1211.0960v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.0960v1-abstract-full" style="display: none;"> We present a detailed report of the method, setup, analysis and results of a precision measurement of the positive muon lifetime. The experiment was conducted at the Paul Scherrer Institute using a time-structured, nearly 100%-polarized, surface muon beam and a segmented, fast-timing, plastic scintillator array. The measurement employed two target arrangements; a magnetized ferromagnetic target with a ~4 kG internal magnetic field and a crystal quartz target in a 130 G external magnetic field. Approximately 1.6 x 10^{12} positrons were accumulated and together the data yield a muon lifetime of tau_{mu}(MuLan) = 2196980.3(2.2) ps (1.0 ppm), thirty times more precise than previous generations of lifetime experiments. The lifetime measurement yields the most accurate value of the Fermi constant G_F (MuLan) = 1.1663787(6) x 10^{-5} GeV^{-2} (0.5 ppm). It also enables new precision studies of weak interactions via lifetime measurements of muonic atoms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.0960v1-abstract-full').style.display = 'none'; document.getElementById('1211.0960v1-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 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">Submitted for publication in Phys. Rev. D (32 pages, 28 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/1103.0761">arXiv:1103.0761</a> <span> [<a href="https://arxiv.org/pdf/1103.0761">pdf</a>, <a href="https://arxiv.org/format/1103.0761">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/10.1016/j.nima.2011.04.031">10.1016/j.nima.2011.04.031 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The G0 Experiment: Apparatus for Parity-Violating Electron Scattering Measurements at Forward and Backward Angles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=G0+Collaboration"> G0 Collaboration</a>, <a href="/search/physics?searchtype=author&query=Androic%2C+D">D. Androic</a>, <a href="/search/physics?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/physics?searchtype=author&query=Arvieux%2C+J">J. Arvieux</a>, <a href="/search/physics?searchtype=author&query=Asaturyan%2C+R">R. Asaturyan</a>, <a href="/search/physics?searchtype=author&query=Averett%2C+T+D">T. D. Averett</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+S+L">S. L. Bailey</a>, <a href="/search/physics?searchtype=author&query=Batigne%2C+G">G. Batigne</a>, <a href="/search/physics?searchtype=author&query=Beck%2C+D+H">D. H. Beck</a>, <a href="/search/physics?searchtype=author&query=Beise%2C+E+J">E. J. Beise</a>, <a href="/search/physics?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/physics?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/physics?searchtype=author&query=Bimbot%2C+L">L. Bimbot</a>, <a href="/search/physics?searchtype=author&query=Birchall%2C+J">J. Birchall</a>, <a href="/search/physics?searchtype=author&query=Biselli%2C+A">A. Biselli</a>, <a href="/search/physics?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/physics?searchtype=author&query=Breuer%2C+H">H. Breuer</a>, <a href="/search/physics?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/physics?searchtype=author&query=Capuano%2C+C+L">C. L. Capuano</a>, <a href="/search/physics?searchtype=author&query=Carlini%2C+R+D">R. D. Carlini</a>, <a href="/search/physics?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/physics?searchtype=author&query=Chant%2C+N">N. Chant</a>, <a href="/search/physics?searchtype=author&query=Chao%2C+Y+-">Y. -C. Chao</a>, <a href="/search/physics?searchtype=author&query=Clark%2C+R">R. Clark</a>, <a href="/search/physics?searchtype=author&query=Coppens%2C+A">A. Coppens</a> , et al. (105 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="1103.0761v1-abstract-short" style="display: inline;"> In the G0 experiment, performed at Jefferson Lab, the parity-violating elastic scattering of electrons from protons and quasi-elastic scattering from deuterons is measured in order to determine the neutral weak currents of the nucleon. Asymmetries as small as 1 part per million in the scattering of a polarized electron beam are determined using a dedicated apparatus. It consists of specialized bea… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1103.0761v1-abstract-full').style.display = 'inline'; document.getElementById('1103.0761v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1103.0761v1-abstract-full" style="display: none;"> In the G0 experiment, performed at Jefferson Lab, the parity-violating elastic scattering of electrons from protons and quasi-elastic scattering from deuterons is measured in order to determine the neutral weak currents of the nucleon. Asymmetries as small as 1 part per million in the scattering of a polarized electron beam are determined using a dedicated apparatus. It consists of specialized beam-monitoring and control systems, a cryogenic hydrogen (or deuterium) target, and a superconducting, toroidal magnetic spectrometer equipped with plastic scintillation and aerogel Cerenkov detectors, as well as fast readout electronics for the measurement of individual events. The overall design and performance of this experimental system is discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1103.0761v1-abstract-full').style.display = 'none'; document.getElementById('1103.0761v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 March, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">Submitted to Nuclear Instruments and Methods</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instrum. Methods A 646 (2011)59 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/0111019">arXiv:nucl-ex/0111019</a> <span> [<a href="https://arxiv.org/pdf/nucl-ex/0111019">pdf</a>, <a href="https://arxiv.org/ps/nucl-ex/0111019">ps</a>, <a href="https://arxiv.org/format/nucl-ex/0111019">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="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Resonant Scattering of Muonic Hydrogen Atoms and Dynamics of Muonic Molecular Complex </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=TRIUMF+Munoic+Hydrogen+Collaboration"> TRIUMF Munoic Hydrogen Collaboration</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Adamczak%2C+A">A. Adamczak</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+J+M">J. M. Bailey</a>, <a href="/search/physics?searchtype=author&query=Beer%2C+G+A">G. A. Beer</a>, <a href="/search/physics?searchtype=author&query=Beveridge%2C+J+L">J. L. Beveridge</a>, <a href="/search/physics?searchtype=author&query=Faifman%2C+M+P">M. P. Faifman</a>, <a href="/search/physics?searchtype=author&query=Huber%2C+T+M">T. M. Huber</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/physics?searchtype=author&query=Knowles%2C+P+E">P. E. Knowles</a>, <a href="/search/physics?searchtype=author&query=Kunselman%2C+A+R">A. R. Kunselman</a>, <a href="/search/physics?searchtype=author&query=Maier%2C+M">M. Maier</a>, <a href="/search/physics?searchtype=author&query=Markushin%2C+V+E">V. E. Markushin</a>, <a href="/search/physics?searchtype=author&query=Marshall%2C+G+M">G. M. Marshall</a>, <a href="/search/physics?searchtype=author&query=Martoff%2C+C+J">C. J. Martoff</a>, <a href="/search/physics?searchtype=author&query=Mason%2C+G+R">G. R. Mason</a>, <a href="/search/physics?searchtype=author&query=Mulhauser%2C+F">F. Mulhauser</a>, <a href="/search/physics?searchtype=author&query=Olin%2C+A">A. Olin</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</a>, <a href="/search/physics?searchtype=author&query=Porcelli%2C+T+A">T. A. Porcelli</a>, <a href="/search/physics?searchtype=author&query=Wozniak%2C+J">J. Wozniak</a>, <a href="/search/physics?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="nucl-ex/0111019v1-abstract-short" style="display: inline;"> Resonant scattering of muonic hydrogen atoms via back decay of molecular complex, a key process in the understanding of epithermal muonic molecular formation, is analyzed. The limitations of the effective rate approximation are discussed and the importance of the explicit treatment of the back decay is stressed. An expression of the energy distribution for the back-decayed atoms is given. </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/0111019v1-abstract-full" style="display: none;"> Resonant scattering of muonic hydrogen atoms via back decay of molecular complex, a key process in the understanding of epithermal muonic molecular formation, is analyzed. The limitations of the effective rate approximation are discussed and the importance of the explicit treatment of the back decay is stressed. An expression of the energy distribution for the back-decayed atoms is given. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/0111019v1-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/0111019v1-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 November, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2001. </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">5pages, contribution to RIKEN International Symposium on Muon Catalyzed Fusion, to be published in Hyperfine Interactions</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> TRI-PP-01-36 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0104010">arXiv:physics/0104010</a> <span> [<a href="https://arxiv.org/pdf/physics/0104010">pdf</a>, <a href="https://arxiv.org/ps/physics/0104010">ps</a>, <a href="https://arxiv.org/format/physics/0104010">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Physics">physics.gen-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.86.3763">10.1103/PhysRevLett.86.3763 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Resonant $d渭t$ Molecular Formation Rate in Solid HD </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Porcelli%2C+T+A">T. A. Porcelli</a>, <a href="/search/physics?searchtype=author&query=Adamczak%2C+A">A. Adamczak</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+J+M">J. M. Bailey</a>, <a href="/search/physics?searchtype=author&query=Beer%2C+G+A">G. A. Beer</a>, <a href="/search/physics?searchtype=author&query=Douglas%2C+J+L">J. L. Douglas</a>, <a href="/search/physics?searchtype=author&query=Faifman%2C+M+P">M. P. Faifman</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Huber%2C+T+M">T. M. Huber</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/physics?searchtype=author&query=Knowles%2C+P+E">P. E. Knowles</a>, <a href="/search/physics?searchtype=author&query=Kunselman%2C+A+R">A. R. Kunselman</a>, <a href="/search/physics?searchtype=author&query=Maier%2C+M">M. Maier</a>, <a href="/search/physics?searchtype=author&query=kushin%2C+V+E+M">V. E. Mar kushin</a>, <a href="/search/physics?searchtype=author&query=Marshall%2C+G+M">G. M. Marshall</a>, <a href="/search/physics?searchtype=author&query=Mason%2C+G+R">G. R. Mason</a>, <a href="/search/physics?searchtype=author&query=Mulhauser%2C+F">F. Mulhauser</a>, <a href="/search/physics?searchtype=author&query=Olin%2C+A">A. Olin</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</a>, <a href="/search/physics?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="physics/0104010v1-abstract-short" style="display: inline;"> Measurements of muon-catalyzed dt fusion ($d渭t \to ^4He+n+渭^-$) in solid HD have been performed. The theory describing the energy dependent resonant molecular formation rate for the reaction $渭t$ + HD $\to [(d渭t)pee]^*$ is compared to experimental results in a pure solid HD target. Constraints on the rates are inferred through the use of a Monte Carlo model developed specifically for the experim… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0104010v1-abstract-full').style.display = 'inline'; document.getElementById('physics/0104010v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0104010v1-abstract-full" style="display: none;"> Measurements of muon-catalyzed dt fusion ($d渭t \to ^4He+n+渭^-$) in solid HD have been performed. The theory describing the energy dependent resonant molecular formation rate for the reaction $渭t$ + HD $\to [(d渭t)pee]^*$ is compared to experimental results in a pure solid HD target. Constraints on the rates are inferred through the use of a Monte Carlo model developed specifically for the experiment. From the time-of- flight analysis of fusion events in 16 and 37 $渭g\cdot cm^{-2}$ targets, an average formation rate consistent with 0.897$\pm$(0.046)$_{stat}\pm$ (0.166)$_{syst}$ times the theoretical prediction was obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0104010v1-abstract-full').style.display = 'none'; document.getElementById('physics/0104010v1-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 April, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2001. </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">4 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> TRI-PP-01-01 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.86:3763-3766,2001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/0101007">arXiv:nucl-ex/0101007</a> <span> [<a href="https://arxiv.org/pdf/nucl-ex/0101007">pdf</a>, <a href="https://arxiv.org/ps/nucl-ex/0101007">ps</a>, <a href="https://arxiv.org/format/nucl-ex/0101007">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="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Time-of-Flight Spectroscopy of Muonic Hydrogen Atoms and Molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=TRIUMF+Muonic+Hydrogen+Collaboration"> TRIUMF Muonic Hydrogen Collaboration</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Adamczak%2C+A">A. Adamczak</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+J+M">J. M. Bailey</a>, <a href="/search/physics?searchtype=author&query=Beer%2C+G+A">G. A. Beer</a>, <a href="/search/physics?searchtype=author&query=Beveridge%2C+J+L">J. L. Beveridge</a>, <a href="/search/physics?searchtype=author&query=Faifman%2C+M+P">M. P. Faifman</a>, <a href="/search/physics?searchtype=author&query=Huber%2C+T+M">T. M. Huber</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/physics?searchtype=author&query=Knowles%2C+P+E">P. E. Knowles</a>, <a href="/search/physics?searchtype=author&query=Kunselman%2C+A+R">A. R. Kunselman</a>, <a href="/search/physics?searchtype=author&query=Markushin%2C+V+E">V. E. Markushin</a>, <a href="/search/physics?searchtype=author&query=Marshall%2C+G+M">G. M. Marshall</a>, <a href="/search/physics?searchtype=author&query=Mason%2C+G+R">G. R. Mason</a>, <a href="/search/physics?searchtype=author&query=Mulhauser%2C+F">F. Mulhauser</a>, <a href="/search/physics?searchtype=author&query=Olin%2C+A">A. Olin</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</a>, <a href="/search/physics?searchtype=author&query=Porcelli%2C+T+A">T. A. Porcelli</a>, <a href="/search/physics?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="nucl-ex/0101007v1-abstract-short" style="display: inline;"> Studies of muonic hydrogen atoms and molecules have been performed traditionally in bulk targets of gas, liquid or solid. At TRIUMF, Canada's meson facility, we have developed a new type of target system using multilayer thin films of solid hydrogen, which provides a beam of muonic hydrogen atoms in vacuum. Using the time-of-flight of the muonic atoms, the energy-dependent information of muonic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/0101007v1-abstract-full').style.display = 'inline'; document.getElementById('nucl-ex/0101007v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/0101007v1-abstract-full" style="display: none;"> Studies of muonic hydrogen atoms and molecules have been performed traditionally in bulk targets of gas, liquid or solid. At TRIUMF, Canada's meson facility, we have developed a new type of target system using multilayer thin films of solid hydrogen, which provides a beam of muonic hydrogen atoms in vacuum. Using the time-of-flight of the muonic atoms, the energy-dependent information of muonic reactions are obtained in direct manner. We discuss some unique measurements enabled by the new technique, with emphasis on processes relevant to muon catalyzed fusion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/0101007v1-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/0101007v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 January, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2001. </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">Contribution to Hydrogen Atom II --- Precise Physics with Simple Atomic Systems (Springer, Berlin)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> TRI-PP-00-60 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ex/0009005">arXiv:hep-ex/0009005</a> <span> [<a href="https://arxiv.org/pdf/hep-ex/0009005">pdf</a>, <a href="https://arxiv.org/ps/hep-ex/0009005">ps</a>, <a href="https://arxiv.org/format/hep-ex/0009005">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Using Thin Film Targets for Muonic Atoms and Muon Catalyzed Fusion Studies </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=TRIUMF+Munoic+Hydrogen+Collaboration"> TRIUMF Munoic Hydrogen Collaboration</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Adamczak%2C+A">A. Adamczak</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+J+M">J. M. Bailey</a>, <a href="/search/physics?searchtype=author&query=Beer%2C+G+A">G. A. Beer</a>, <a href="/search/physics?searchtype=author&query=Beveridge%2C+J+L">J. L. Beveridge</a>, <a href="/search/physics?searchtype=author&query=Faifman%2C+M+P">M. P. Faifman</a>, <a href="/search/physics?searchtype=author&query=Huber%2C+T+M">T. M. Huber</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/physics?searchtype=author&query=Knowles%2C+P+E">P. E. Knowles</a>, <a href="/search/physics?searchtype=author&query=Kunselman%2C+A+R">A. R. Kunselman</a>, <a href="/search/physics?searchtype=author&query=Markushin%2C+V+E">V. E. Markushin</a>, <a href="/search/physics?searchtype=author&query=Marshall%2C+G+M">G. M. Marshall</a>, <a href="/search/physics?searchtype=author&query=Martoff%2C+C+J">C. J. Martoff</a>, <a href="/search/physics?searchtype=author&query=Mason%2C+G+R">G. R. Mason</a>, <a href="/search/physics?searchtype=author&query=Mulhauser%2C+F">F. Mulhauser</a>, <a href="/search/physics?searchtype=author&query=Olin%2C+A">A. Olin</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</a>, <a href="/search/physics?searchtype=author&query=Porcelli%2C+T+A">T. A. Porcelli</a>, <a href="/search/physics?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="hep-ex/0009005v1-abstract-short" style="display: inline;"> Studies of muonic atoms and muon catalyzed fusion have been conventionally done in a bulk target of gas, liquid or solid hydrogen isotopes. The use of thin film targets developed at TRIUMF have notable advantages in tackling some of the most important questions in the field, which could be further exploited at future high intensity muon sources. We review the technique of the thin film method wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0009005v1-abstract-full').style.display = 'inline'; document.getElementById('hep-ex/0009005v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ex/0009005v1-abstract-full" style="display: none;"> Studies of muonic atoms and muon catalyzed fusion have been conventionally done in a bulk target of gas, liquid or solid hydrogen isotopes. The use of thin film targets developed at TRIUMF have notable advantages in tackling some of the most important questions in the field, which could be further exploited at future high intensity muon sources. We review the technique of the thin film method with emphasis on recent results and a future proposal. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0009005v1-abstract-full').style.display = 'none'; document.getElementById('hep-ex/0009005v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 September, 2000; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2000. </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">Talk given at KEK International Workshop on High Intensity Muon Sources, HIMUS-99</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> TRI-PP-00-51 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/nucl-ex/0008002">arXiv:nucl-ex/0008002</a> <span> [<a href="https://arxiv.org/pdf/nucl-ex/0008002">pdf</a>, <a href="https://arxiv.org/ps/nucl-ex/0008002">ps</a>, <a href="https://arxiv.org/format/nucl-ex/0008002">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="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.85.1642">10.1103/PhysRevLett.85.1642 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Resonant Formation of $d渭t$ Molecules in Deuterium: An Atomic Beam Measurement of Muon Catalyzed dt Fusion </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=TRIUMF+Munoic+Hydrogen+Collaboration"> TRIUMF Munoic Hydrogen Collaboration</a>, <a href="/search/physics?searchtype=author&query=Fujiwara%2C+M+C">M. C. Fujiwara</a>, <a href="/search/physics?searchtype=author&query=Adamczak%2C+A">A. Adamczak</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+J+M">J. M. Bailey</a>, <a href="/search/physics?searchtype=author&query=Beer%2C+G+A">G. A. Beer</a>, <a href="/search/physics?searchtype=author&query=Beveridge%2C+J+L">J. L. Beveridge</a>, <a href="/search/physics?searchtype=author&query=Faifman%2C+M+P">M. P. Faifman</a>, <a href="/search/physics?searchtype=author&query=Huber%2C+T+M">T. M. Huber</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/physics?searchtype=author&query=Knowles%2C+P+E">P. E. Knowles</a>, <a href="/search/physics?searchtype=author&query=Kunselman%2C+A+R">A. R. Kunselman</a>, <a href="/search/physics?searchtype=author&query=Maier%2C+M">M. Maier</a>, <a href="/search/physics?searchtype=author&query=Markushin%2C+V+E">V. E. Markushin</a>, <a href="/search/physics?searchtype=author&query=Marshall%2C+G+M">G. M. Marshall</a>, <a href="/search/physics?searchtype=author&query=Martoff%2C+C+J">C. J. Martoff</a>, <a href="/search/physics?searchtype=author&query=Mason%2C+G+R">G. R. Mason</a>, <a href="/search/physics?searchtype=author&query=Mulhauser%2C+F">F. Mulhauser</a>, <a href="/search/physics?searchtype=author&query=Olin%2C+A">A. Olin</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</a>, <a href="/search/physics?searchtype=author&query=Porcelli%2C+T+A">T. A. Porcelli</a>, <a href="/search/physics?searchtype=author&query=Wozniak%2C+J">J. Wozniak</a>, <a href="/search/physics?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="nucl-ex/0008002v1-abstract-short" style="display: inline;"> Resonant formation of $d渭t$ molecules in collisions of muonic tritium ($渭t$) on D$_2$ was investigated using a beam of $渭t$ atoms, demonstrating a new direct approach in muon catalyzed fusion studies. Strong epithermal resonances in $d渭t$ formation were directly revealed for the first time. From the time-of-flight analysis of $2036\pm 116$ $dt$ fusion events, a formation rate consistent with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/0008002v1-abstract-full').style.display = 'inline'; document.getElementById('nucl-ex/0008002v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="nucl-ex/0008002v1-abstract-full" style="display: none;"> Resonant formation of $d渭t$ molecules in collisions of muonic tritium ($渭t$) on D$_2$ was investigated using a beam of $渭t$ atoms, demonstrating a new direct approach in muon catalyzed fusion studies. Strong epithermal resonances in $d渭t$ formation were directly revealed for the first time. From the time-of-flight analysis of $2036\pm 116$ $dt$ fusion events, a formation rate consistent with $0.73\pm (0.16)_{meas} \pm (0.09)_{model}$ times the theoretical prediction was obtained. For the largest peak at a resonance energy of $0.423 \pm 0.037$ eV, this corresponds to a rate of $(7.1 \pm 1.8) \times 10^9$ s$^{-1}$, more than an order of magnitude larger than those at low energies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('nucl-ex/0008002v1-abstract-full').style.display = 'none'; document.getElementById('nucl-ex/0008002v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 August, 2000; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2000. </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 Phys. Rev. Lett</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> TRI-PP-00-24 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett. 85 (2000) 1642-1645 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/9709029">arXiv:physics/9709029</a> <span> [<a href="https://arxiv.org/pdf/physics/9709029">pdf</a>, <a href="https://arxiv.org/ps/physics/9709029">ps</a>, <a href="https://arxiv.org/format/physics/9709029">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Excited State Muon Transfer in Hydrogen/Deuterium Mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lauss%2C+B">B. Lauss</a>, <a href="/search/physics?searchtype=author&query=Ackerbauer%2C+P">P. Ackerbauer</a>, <a href="/search/physics?searchtype=author&query=Breunlich%2C+W+H">W. H. Breunlich</a>, <a href="/search/physics?searchtype=author&query=Gartner%2C+B">B. Gartner</a>, <a href="/search/physics?searchtype=author&query=Jeitler%2C+M">M. Jeitler</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Marton%2C+J">J. Marton</a>, <a href="/search/physics?searchtype=author&query=Prymas%2C+W">W. Prymas</a>, <a href="/search/physics?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</a>, <a href="/search/physics?searchtype=author&query=Chatellard%2C+D">D. Chatellard</a>, <a href="/search/physics?searchtype=author&query=Egger%2C+J+-">J. -P. Egger</a>, <a href="/search/physics?searchtype=author&query=Jeannet%2C+E">E. Jeannet</a>, <a href="/search/physics?searchtype=author&query=Daniel%2C+H">H. Daniel</a>, <a href="/search/physics?searchtype=author&query=Hartmann%2C+F+J">F. J. Hartmann</a>, <a href="/search/physics?searchtype=author&query=Kosak%2C+A">A. Kosak</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</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="physics/9709029v1-abstract-short" style="display: inline;"> We report the first direct observation of excited state muon transfer in hydrogen/deuterium mixtures by direct measurement of q_1s, the probability that a mu-p atom, which is initially formed in an excited state, reaches the 1s ground state. The dependence of q_1s on deuterium concentration c_d was measured for two different densities at cryogenic temperatures using charge coupled devices (CCDs)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9709029v1-abstract-full').style.display = 'inline'; document.getElementById('physics/9709029v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/9709029v1-abstract-full" style="display: none;"> We report the first direct observation of excited state muon transfer in hydrogen/deuterium mixtures by direct measurement of q_1s, the probability that a mu-p atom, which is initially formed in an excited state, reaches the 1s ground state. The dependence of q_1s on deuterium concentration c_d was measured for two different densities at cryogenic temperatures using charge coupled devices (CCDs) to detect the muonic X rays. First results based on the analysis of the K_alpha-lines of the two isotopes are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9709029v1-abstract-full').style.display = 'none'; document.getElementById('physics/9709029v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 September, 1997; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 1997. </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">4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review Letters 76,25 (1996) 4693-4696 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/9709028">arXiv:physics/9709028</a> <span> [<a href="https://arxiv.org/pdf/physics/9709028">pdf</a>, <a href="https://arxiv.org/ps/physics/9709028">ps</a>, <a href="https://arxiv.org/format/physics/9709028">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.80.3041">10.1103/PhysRevLett.80.3041 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> X-ray emission during the muonic cascade in hydrogen </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lauss%2C+B">B. Lauss</a>, <a href="/search/physics?searchtype=author&query=Ackerbauer%2C+P">P. Ackerbauer</a>, <a href="/search/physics?searchtype=author&query=Breunlich%2C+W+H">W. H. Breunlich</a>, <a href="/search/physics?searchtype=author&query=Gartner%2C+B">B. Gartner</a>, <a href="/search/physics?searchtype=author&query=Jeitler%2C+M">M. Jeitler</a>, <a href="/search/physics?searchtype=author&query=Kammel%2C+P">P. Kammel</a>, <a href="/search/physics?searchtype=author&query=Marton%2C+J">J. Marton</a>, <a href="/search/physics?searchtype=author&query=Prymas%2C+W">W. Prymas</a>, <a href="/search/physics?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</a>, <a href="/search/physics?searchtype=author&query=Chatellard%2C+D">D. Chatellard</a>, <a href="/search/physics?searchtype=author&query=Egger%2C+J+-">J. -P. Egger</a>, <a href="/search/physics?searchtype=author&query=Jeannet%2C+E">E. Jeannet</a>, <a href="/search/physics?searchtype=author&query=Daniel%2C+H">H. Daniel</a>, <a href="/search/physics?searchtype=author&query=Hartmann%2C+F+J">F. J. Hartmann</a>, <a href="/search/physics?searchtype=author&query=Kosak%2C+A">A. Kosak</a>, <a href="/search/physics?searchtype=author&query=Petitjean%2C+C">C. Petitjean</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="physics/9709028v1-abstract-short" style="display: inline;"> We report our investigations of X rays emitted during the muonic cascade in hydrogen employing charge coupled devices as X-ray detectors. The density dependence of the relative X-ray yields for the muonic hydrogen lines (K_alpha, K_beta, K_gamma) has been measured at densities between 0.00115 and 0.97 of liquid hydrogen density. In this density region collisional processes dominate the cascade d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9709028v1-abstract-full').style.display = 'inline'; document.getElementById('physics/9709028v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/9709028v1-abstract-full" style="display: none;"> We report our investigations of X rays emitted during the muonic cascade in hydrogen employing charge coupled devices as X-ray detectors. The density dependence of the relative X-ray yields for the muonic hydrogen lines (K_alpha, K_beta, K_gamma) has been measured at densities between 0.00115 and 0.97 of liquid hydrogen density. In this density region collisional processes dominate the cascade down to low energy levels. A comparison with recent calculations is given in order to demonstrate the influence of Coulomb deexcitation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9709028v1-abstract-full').style.display = 'none'; document.getElementById('physics/9709028v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 September, 1997; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 1997. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, Tex, 4 figures, submitted to Physical Review Letters</span> </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 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