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</div> <div class="control"> <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/2208.04120">arXiv:2208.04120</a> <span> [<a href="https://arxiv.org/pdf/2208.04120">pdf</a>, <a href="https://arxiv.org/format/2208.04120">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Searching for New Physics with DarkLight at the ARIEL Electron-Linac </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+DarkLight+Collaboration"> The DarkLight Collaboration</a>, <a href="/search/physics?searchtype=author&query=Cline%2C+E">E. Cline</a>, <a href="/search/physics?searchtype=author&query=Corliss%2C+R">R. Corliss</a>, <a href="/search/physics?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/physics?searchtype=author&query=Alarcon%2C+R">R. Alarcon</a>, <a href="/search/physics?searchtype=author&query=Baartman%2C+R">R. Baartman</a>, <a href="/search/physics?searchtype=author&query=Benson%2C+S">S. Benson</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Ciarniello%2C+D">D. Ciarniello</a>, <a href="/search/physics?searchtype=author&query=Christopher%2C+A">A. Christopher</a>, <a href="/search/physics?searchtype=author&query=Colon%2C+A">A. Colon</a>, <a href="/search/physics?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/physics?searchtype=author&query=Dehmelt%2C+K">K. Dehmelt</a>, <a href="/search/physics?searchtype=author&query=Deshpande%2C+A">A. Deshpande</a>, <a href="/search/physics?searchtype=author&query=Dilling%2C+J">J. Dilling</a>, <a href="/search/physics?searchtype=author&query=Dongwi%2C+D+H">D. H. Dongwi</a>, <a href="/search/physics?searchtype=author&query=Fisher%2C+P">P. Fisher</a>, <a href="/search/physics?searchtype=author&query=Gautam%2C+T">T. Gautam</a>, <a href="/search/physics?searchtype=author&query=Gericke%2C+M">M. Gericke</a>, <a href="/search/physics?searchtype=author&query=Hasell%2C+D">D. Hasell</a>, <a href="/search/physics?searchtype=author&query=Hasinoff%2C+M">M. Hasinoff</a>, <a href="/search/physics?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/physics?searchtype=author&query=Johnston%2C+R">R. Johnston</a>, <a href="/search/physics?searchtype=author&query=Kanungo%2C+R">R. Kanungo</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">J. Kelsey</a> , et al. (21 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2208.04120v2-abstract-short" style="display: inline;"> The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched for such a particle, but so far it has proven elusive. In recent years the concept of a low mass dark photon has gained popularity in the physics community. Of particular recent interest is the $^8$Be and $^4$He anomaly, w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04120v2-abstract-full').style.display = 'inline'; document.getElementById('2208.04120v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.04120v2-abstract-full" style="display: none;"> The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched for such a particle, but so far it has proven elusive. In recent years the concept of a low mass dark photon has gained popularity in the physics community. Of particular recent interest is the $^8$Be and $^4$He anomaly, which could be explained by a new fifth force carrier with a mass of 17 MeV/$c^2$. The proposed DarkLight experiment would search for this potential low mass force carrier at ARIEL in the 10-20 MeV e$^+$e$^-$ invariant mass range. This proceeding will focus on the experimental design and physics case of the DarkLight experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04120v2-abstract-full').style.display = 'none'; document.getElementById('2208.04120v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures, to be submitted as part of the proceedings on "New Scientific Opportunities with the TRIUMF ARIEL e-linac"</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.11382">arXiv:2205.11382</a> <span> [<a href="https://arxiv.org/pdf/2205.11382">pdf</a>, <a href="https://arxiv.org/format/2205.11382">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/2374/1/012009">10.1088/1742-6596/2374/1/012009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Initial performance of the GlueX DIRC detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/physics?searchtype=author&query=Barbosa%2C+F">F. Barbosa</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/physics?searchtype=author&query=Dzhygadlo%2C+R">R. Dzhygadlo</a>, <a href="/search/physics?searchtype=author&query=Fanelli%2C+C">C. Fanelli</a>, <a href="/search/physics?searchtype=author&query=Frye%2C+J">J. Frye</a>, <a href="/search/physics?searchtype=author&query=Hardin%2C+J">J. Hardin</a>, <a href="/search/physics?searchtype=author&query=Hurley%2C+A">A. Hurley</a>, <a href="/search/physics?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/physics?searchtype=author&query=Kalicy%2C+G">G. Kalicy</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">J. Kelsey</a>, <a href="/search/physics?searchtype=author&query=Li%2C+W+B">W. B. Li</a>, <a href="/search/physics?searchtype=author&query=Patsyuk%2C+M">M. Patsyuk</a>, <a href="/search/physics?searchtype=author&query=Schwiening%2C+J">J. Schwiening</a>, <a href="/search/physics?searchtype=author&query=Shepherd%2C+M">M. Shepherd</a>, <a href="/search/physics?searchtype=author&query=Stevens%2C+J+R">J. R. Stevens</a>, <a href="/search/physics?searchtype=author&query=Whitlatch%2C+T">T. Whitlatch</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+M">M. Williams</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+Y">Y. Yang</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="2205.11382v1-abstract-short" style="display: inline;"> The GlueX experiment at Jefferson Laboratory aims to perform quantitative tests of non-perturbative QCD by studying the spectrum of light-quark mesons and baryons. A Detector of Internally Reflected Cherenkov light (DIRC) was installed to enhance the particle identification (PID) capability of the GlueX experiment by providing clean $蟺$/K separation up to 3.7 GeV/$c$ momentum in the forward region… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.11382v1-abstract-full').style.display = 'inline'; document.getElementById('2205.11382v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.11382v1-abstract-full" style="display: none;"> The GlueX experiment at Jefferson Laboratory aims to perform quantitative tests of non-perturbative QCD by studying the spectrum of light-quark mesons and baryons. A Detector of Internally Reflected Cherenkov light (DIRC) was installed to enhance the particle identification (PID) capability of the GlueX experiment by providing clean $蟺$/K separation up to 3.7 GeV/$c$ momentum in the forward region ($胃<11^{\circ}$), which will allow the study of hybrid mesons decaying into kaon final states with significantly higher efficiency and purity. The new PID system is constructed with radiators from the decommissioned BaBar DIRC counter, combined with new compact photon cameras based on the SuperB FDIRC concept. The full system was successfully installed and commissioned with beam during 2019/2020. The initial PID performance of the system was evaluated and compared to one from Geant4 simulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.11382v1-abstract-full').style.display = 'none'; document.getElementById('2205.11382v1-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 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">International Conference on Technology and Instrumentation in Particle Physics 2021, 5 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.07195">arXiv:2005.07195</a> <span> [<a href="https://arxiv.org/pdf/2005.07195">pdf</a>, <a href="https://arxiv.org/format/2005.07195">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Installation and Commissioning of the GlueX DIRC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/physics?searchtype=author&query=Barbosa%2C+F">F. Barbosa</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/physics?searchtype=author&query=Dzhygadlo%2C+R">R. Dzhygadlo</a>, <a href="/search/physics?searchtype=author&query=Fanelli%2C+C">C. Fanelli</a>, <a href="/search/physics?searchtype=author&query=Frye%2C+J">J. Frye</a>, <a href="/search/physics?searchtype=author&query=Hardin%2C+J">J. Hardin</a>, <a href="/search/physics?searchtype=author&query=Hurley%2C+A">A. Hurley</a>, <a href="/search/physics?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/physics?searchtype=author&query=Kalicy%2C+G">G. Kalicy</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">J. Kelsey</a>, <a href="/search/physics?searchtype=author&query=Li%2C+W+B">W. B. Li</a>, <a href="/search/physics?searchtype=author&query=Patsyuk%2C+M">M. Patsyuk</a>, <a href="/search/physics?searchtype=author&query=Schwiening%2C+J">J. Schwiening</a>, <a href="/search/physics?searchtype=author&query=Shepherd%2C+M">M. Shepherd</a>, <a href="/search/physics?searchtype=author&query=Stevens%2C+J+R">J. R. Stevens</a>, <a href="/search/physics?searchtype=author&query=Whitlatch%2C+T">T. Whitlatch</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+M">M. Williams</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+Y">Y. Yang</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="2005.07195v3-abstract-short" style="display: inline;"> The GlueX experiment takes place in experimental Hall D at Jefferson Lab (JLab). With a linearly polarized photon beam of up to 12 GeV energy, GlueX is a dedicated experiment to search for hybrid mesons via photoproduction reactions. The low-intensity (Phase I) of GlueX was recently completed; the high-intensity (Phase II) started in 2020 including an upgraded particle identification system, known… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.07195v3-abstract-full').style.display = 'inline'; document.getElementById('2005.07195v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.07195v3-abstract-full" style="display: none;"> The GlueX experiment takes place in experimental Hall D at Jefferson Lab (JLab). With a linearly polarized photon beam of up to 12 GeV energy, GlueX is a dedicated experiment to search for hybrid mesons via photoproduction reactions. The low-intensity (Phase I) of GlueX was recently completed; the high-intensity (Phase II) started in 2020 including an upgraded particle identification system, known as the DIRC (Detection of Internally Reflected Cherenkov light), utilizing components from the decommissioned BaBar experiment. The identification and separation of the kaon final states will significantly enhance the GlueX physics program, by adding the capability of accessing the strange quark flavor content of conventional (and potentially hybrid) mesons. In these proceedings, we report that the installation and commissioning of the DIRC detector has been successfully completed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.07195v3-abstract-full').style.display = 'none'; document.getElementById('2005.07195v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.07990">arXiv:2002.07990</a> <span> [<a href="https://arxiv.org/pdf/2002.07990">pdf</a>, <a href="https://arxiv.org/format/2002.07990">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/10.1088/1748-0221/15/04/C04054">10.1088/1748-0221/15/04/C04054 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The GlueX DIRC Program </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/physics?searchtype=author&query=Barbosa%2C+F">F. Barbosa</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/physics?searchtype=author&query=Dzhygadlo%2C+R">R. Dzhygadlo</a>, <a href="/search/physics?searchtype=author&query=Fanelli%2C+C">C. Fanelli</a>, <a href="/search/physics?searchtype=author&query=Frye%2C+J">J. Frye</a>, <a href="/search/physics?searchtype=author&query=Hardin%2C+J">J. Hardin</a>, <a href="/search/physics?searchtype=author&query=Hurley%2C+A">A. Hurley</a>, <a href="/search/physics?searchtype=author&query=Kalicy%2C+G">G. Kalicy</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">J. Kelsey</a>, <a href="/search/physics?searchtype=author&query=Li%2C+W">W. Li</a>, <a href="/search/physics?searchtype=author&query=Patsyuk%2C+M">M. Patsyuk</a>, <a href="/search/physics?searchtype=author&query=Schwarz%2C+C">C. Schwarz</a>, <a href="/search/physics?searchtype=author&query=Schwiening%2C+J">J. Schwiening</a>, <a href="/search/physics?searchtype=author&query=Shepherd%2C+M">M. Shepherd</a>, <a href="/search/physics?searchtype=author&query=Stevens%2C+J+R">J. R. Stevens</a>, <a href="/search/physics?searchtype=author&query=Whitlatch%2C+T">T. Whitlatch</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+M">M. Williams</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+Y">Y. Yang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2002.07990v2-abstract-short" style="display: inline;"> The GlueX experiment is located in experimental Hall D at Jefferson Lab (JLab) and provides a unique capability to search for hybrid mesons in high-energy photoproduction, utilizing a ~9 GeV linearly polarized photon beam. The initial, low-intensity phase of GlueX was recently completed and a high-intensity phase has begun in 2020 which includes an upgraded kaon identification system, known as the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.07990v2-abstract-full').style.display = 'inline'; document.getElementById('2002.07990v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.07990v2-abstract-full" style="display: none;"> The GlueX experiment is located in experimental Hall D at Jefferson Lab (JLab) and provides a unique capability to search for hybrid mesons in high-energy photoproduction, utilizing a ~9 GeV linearly polarized photon beam. The initial, low-intensity phase of GlueX was recently completed and a high-intensity phase has begun in 2020 which includes an upgraded kaon identification system, known as the DIRC (Detection of Internally Reflected Cherenkov light), utilizing components from the decommissioned BaBar DIRC. The identification of kaon final states will significantly enhance the GlueX physics program, to aid in inferring the quark flavor content of conventional (and potentially hybrid) mesons. In these proceedings we describe the installation of the GlueX DIRC and the analysis of initial commissioning data <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.07990v2-abstract-full').style.display = 'none'; document.getElementById('2002.07990v2-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 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.09937">arXiv:1908.09937</a> <span> [<a href="https://arxiv.org/pdf/1908.09937">pdf</a>, <a href="https://arxiv.org/format/1908.09937">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/10.1088/1748-0221/14/11/P11017">10.1088/1748-0221/14/11/P11017 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A New Cryogenic Apparatus to Search for the Neutron Electric Dipole Moment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ahmed%2C+M+W">M. W. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Alarcon%2C+R">R. Alarcon</a>, <a href="/search/physics?searchtype=author&query=Aleksandrova%2C+A">A. Aleksandrova</a>, <a href="/search/physics?searchtype=author&query=Baessler%2C+S">S. Baessler</a>, <a href="/search/physics?searchtype=author&query=Barron-Palos%2C+L">L. Barron-Palos</a>, <a href="/search/physics?searchtype=author&query=Bartoszek%2C+L+M">L. M. Bartoszek</a>, <a href="/search/physics?searchtype=author&query=Beck%2C+D+H">D. H. Beck</a>, <a href="/search/physics?searchtype=author&query=Behzadipour%2C+M">M. Behzadipour</a>, <a href="/search/physics?searchtype=author&query=Berkutov%2C+I">I. Berkutov</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Blatnik%2C+M">M. Blatnik</a>, <a href="/search/physics?searchtype=author&query=Broering%2C+M">M. Broering</a>, <a href="/search/physics?searchtype=author&query=Broussard%2C+L+J">L. J. Broussard</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/physics?searchtype=author&query=Cianciolo%2C+V">V. Cianciolo</a>, <a href="/search/physics?searchtype=author&query=Clayton%2C+S+M">S. M. Clayton</a>, <a href="/search/physics?searchtype=author&query=Cooper%2C+M+D">M. D. Cooper</a>, <a href="/search/physics?searchtype=author&query=Crawford%2C+C">C. Crawford</a>, <a href="/search/physics?searchtype=author&query=Currie%2C+S+A">S. A. Currie</a>, <a href="/search/physics?searchtype=author&query=Daurer%2C+C">C. Daurer</a>, <a href="/search/physics?searchtype=author&query=Dipert%2C+R">R. Dipert</a>, <a href="/search/physics?searchtype=author&query=Dow%2C+K">K. Dow</a>, <a href="/search/physics?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/physics?searchtype=author&query=Efremenko%2C+Y">Y. Efremenko</a> , et al. (69 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="1908.09937v3-abstract-short" style="display: inline;"> A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with a major improvement in sensitivity compared to the existing limit in the search for a neutron Electric Dipole Moment (EDM). It uses superfluid $^4$He to produce a high density of Ultra-Cold Neutrons (UCN) which are contained in a suitably coated pair of measurement cells. The experiment, to be operated at the Spallati… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.09937v3-abstract-full').style.display = 'inline'; document.getElementById('1908.09937v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.09937v3-abstract-full" style="display: none;"> A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with a major improvement in sensitivity compared to the existing limit in the search for a neutron Electric Dipole Moment (EDM). It uses superfluid $^4$He to produce a high density of Ultra-Cold Neutrons (UCN) which are contained in a suitably coated pair of measurement cells. The experiment, to be operated at the Spallation Neutron Source at Oak Ridge National Laboratory, uses polarized $^3$He from an Atomic Beam Source injected into the superfluid $^4$He and transported to the measurement cells as a co-magnetometer. The superfluid $^4$He is also used as an insulating medium allowing significantly higher electric fields, compared to previous experiments, to be maintained across the measurement cells. These features provide an ultimate statistical uncertainty for the EDM of $2-3\times 10^{-28}$ e-cm, with anticipated systematic uncertainties below this level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.09937v3-abstract-full').style.display = 'none'; document.getElementById('1908.09937v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Instrumentation, Vol 14, P11017, 2019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.02700">arXiv:1903.02700</a> <span> [<a href="https://arxiv.org/pdf/1903.02700">pdf</a>, <a href="https://arxiv.org/format/1903.02700">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/10.1051/epjconf/201921902005">10.1051/epjconf/201921902005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The neutron electric dipole moment experiment at the Spallation Neutron Source </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Leung%2C+K+K+H">K. K. H. Leung</a>, <a href="/search/physics?searchtype=author&query=Ahmed%2C+M">M. Ahmed</a>, <a href="/search/physics?searchtype=author&query=Alarcon%2C+R">R. Alarcon</a>, <a href="/search/physics?searchtype=author&query=Aleksandrova%2C+A">A. Aleksandrova</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=Barr%C3%B3n-Palos%2C+L">L. Barr贸n-Palos</a>, <a href="/search/physics?searchtype=author&query=Bartoszek%2C+L">L. Bartoszek</a>, <a href="/search/physics?searchtype=author&query=Beck%2C+D+H">D. H. Beck</a>, <a href="/search/physics?searchtype=author&query=Behzadipour%2C+M">M. Behzadipour</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Blatnik%2C+M+A">M. A. Blatnik</a>, <a href="/search/physics?searchtype=author&query=Broering%2C+M">M. Broering</a>, <a href="/search/physics?searchtype=author&query=Broussard%2C+L+J">L. J. Broussard</a>, <a href="/search/physics?searchtype=author&query=Busch%2C+M">M. Busch</a>, <a href="/search/physics?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/physics?searchtype=author&query=Chu%2C+P+-">P. -H. Chu</a>, <a href="/search/physics?searchtype=author&query=Cianciolo%2C+V">V. Cianciolo</a>, <a href="/search/physics?searchtype=author&query=Clayton%2C+S+M">S. M. Clayton</a>, <a href="/search/physics?searchtype=author&query=Cooper%2C+M+D">M. D. Cooper</a>, <a href="/search/physics?searchtype=author&query=Crawford%2C+C">C. Crawford</a>, <a href="/search/physics?searchtype=author&query=Currie%2C+S+A">S. A. Currie</a>, <a href="/search/physics?searchtype=author&query=Daurer%2C+C">C. Daurer</a>, <a href="/search/physics?searchtype=author&query=Dipert%2C+R">R. Dipert</a>, <a href="/search/physics?searchtype=author&query=Dow%2C+K">K. Dow</a>, <a href="/search/physics?searchtype=author&query=Dutta%2C+D">D. Dutta</a> , et al. (68 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="1903.02700v3-abstract-short" style="display: inline;"> Novel experimental techniques are required to make the next big leap in neutron electric dipole moment experimental sensitivity, both in terms of statistics and systematic error control. The nEDM experiment at the Spallation Neutron Source (nEDM@SNS) will implement the scheme of Golub & Lamoreaux [Phys. Rep., 237, 1 (1994)]. The unique properties of combining polarized ultracold neutrons, polarize… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.02700v3-abstract-full').style.display = 'inline'; document.getElementById('1903.02700v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.02700v3-abstract-full" style="display: none;"> Novel experimental techniques are required to make the next big leap in neutron electric dipole moment experimental sensitivity, both in terms of statistics and systematic error control. The nEDM experiment at the Spallation Neutron Source (nEDM@SNS) will implement the scheme of Golub & Lamoreaux [Phys. Rep., 237, 1 (1994)]. The unique properties of combining polarized ultracold neutrons, polarized $^3$He, and superfluid $^4$He will be exploited to provide a sensitivity to $\sim 10^{-28}\,e{\rm \,\cdot\, cm}$. Our cryogenic apparatus will deploy two small ($3\,{\rm L}$) measurement cells with a high density of ultracold neutrons produced and spin analyzed in situ. The electric field strength, precession time, magnetic shielding, and detected UCN number will all be enhanced compared to previous room temperature Ramsey measurements. Our $^3$He co-magnetometer offers unique control of systematic effects, in particular the Bloch-Siegert induced false EDM. Furthermore, there will be two distinct measurement modes: free precession and dressed spin. This will provide an important self-check of our results. Following five years of "critical component demonstration," our collaboration transitioned to a "large scale integration" phase in 2018. An overview of our measurement techniques, experimental design, and brief updates are described in these proceedings. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.02700v3-abstract-full').style.display = 'none'; document.getElementById('1903.02700v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to proceedings of PPNS 2018 - International Workshop on Particle physics at Neutron Sources (https://www.webofconferences.org/epj-web-of-conferences-forthcoming-conferences/1148-ppns-2018)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.02648">arXiv:1903.02648</a> <span> [<a href="https://arxiv.org/pdf/1903.02648">pdf</a>, <a href="https://arxiv.org/format/1903.02648">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2019.05.071">10.1016/j.nima.2019.05.071 <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 Windowless Gas Target Internal to a Solenoidal Magnet for Use with a Megawatt Electron Beam </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lee%2C+S">S. Lee</a>, <a href="/search/physics?searchtype=author&query=Corliss%2C+R">R. Corliss</a>, <a href="/search/physics?searchtype=author&query=Fri%C5%A1%C4%8Di%C4%87%2C+I">I. Fri拧膷i膰</a>, <a href="/search/physics?searchtype=author&query=Alarcon%2C+R">R. Alarcon</a>, <a href="/search/physics?searchtype=author&query=Aulenbacher%2C+S">S. Aulenbacher</a>, <a href="/search/physics?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/physics?searchtype=author&query=Benson%2C+S">S. Benson</a>, <a href="/search/physics?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Boyce%2C+J">J. Boyce</a>, <a href="/search/physics?searchtype=author&query=Coleman%2C+J">J. Coleman</a>, <a href="/search/physics?searchtype=author&query=Douglas%2C+D">D. Douglas</a>, <a href="/search/physics?searchtype=author&query=Epstein%2C+C+S">C. S. Epstein</a>, <a href="/search/physics?searchtype=author&query=Fisher%2C+P">P. Fisher</a>, <a href="/search/physics?searchtype=author&query=Frierson%2C+S">S. Frierson</a>, <a href="/search/physics?searchtype=author&query=Gar%C3%A7on%2C+M">M. Gar莽on</a>, <a href="/search/physics?searchtype=author&query=Grames%2C+J">J. Grames</a>, <a href="/search/physics?searchtype=author&query=Hasell%2C+D">D. Hasell</a>, <a href="/search/physics?searchtype=author&query=Hernandez-Garcia%2C+C">C. Hernandez-Garcia</a>, <a href="/search/physics?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/physics?searchtype=author&query=Johnston%2C+R">R. Johnston</a>, <a href="/search/physics?searchtype=author&query=Jordan%2C+K">K. Jordan</a>, <a href="/search/physics?searchtype=author&query=Kazimi%2C+R">R. Kazimi</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">J. Kelsey</a>, <a href="/search/physics?searchtype=author&query=Kohl%2C+M">M. Kohl</a> , et al. (15 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1903.02648v4-abstract-short" style="display: inline;"> A windowless hydrogen gas target of nominal thickness $10^{19}$ cm$^{-2}$ is an essential component of the DarkLight experiment, which is designed to utilize the megawatt electron beam at an Energy Recovery Linac (ERL). The design of such a target is challenging because the pressure drops by many orders of magnitude between the central, high-density section of the target and the surrounding beamli… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.02648v4-abstract-full').style.display = 'inline'; document.getElementById('1903.02648v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.02648v4-abstract-full" style="display: none;"> A windowless hydrogen gas target of nominal thickness $10^{19}$ cm$^{-2}$ is an essential component of the DarkLight experiment, which is designed to utilize the megawatt electron beam at an Energy Recovery Linac (ERL). The design of such a target is challenging because the pressure drops by many orders of magnitude between the central, high-density section of the target and the surrounding beamline, resulting in laminar, transitional, and finally molecular flow regimes. The target system was assembled and operated at Jefferson Lab's Low Energy Recirculator Facility (LERF) in 2016, and subsequently underwent several revisions and calibration tests at MIT Bates in 2017. The system at dynamic equilibrium was simulated in COMSOL to provide a better understanding of its optimal operation at other working points. We have determined that a windowless gas target with sufficiently high density for DarkLight's experimental needs is feasible in an ERL environment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.02648v4-abstract-full').style.display = 'none'; document.getElementById('1903.02648v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 14 figures; v2: minor improvements; v3: author list updated; v4: minor revision</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instrum. Methods Phys. Res. A, 939 (2019), pp. 46-54 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1606.05645">arXiv:1606.05645</a> <span> [<a href="https://arxiv.org/pdf/1606.05645">pdf</a>, <a href="https://arxiv.org/format/1606.05645">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/10.1088/1748-0221/11/07/C07010">10.1088/1748-0221/11/07/C07010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The GlueX DIRC Project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Stevens%2C+J">Justin Stevens</a>, <a href="/search/physics?searchtype=author&query=Barbosa%2C+F">Fernando Barbosa</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">Jason Bessuille</a>, <a href="/search/physics?searchtype=author&query=Chudakov%2C+E">Eugene Chudakov</a>, <a href="/search/physics?searchtype=author&query=Dzhygadlo%2C+R">Roman Dzhygadlo</a>, <a href="/search/physics?searchtype=author&query=Fanelli%2C+C">Cristiano Fanelli</a>, <a href="/search/physics?searchtype=author&query=Frye%2C+J">John Frye</a>, <a href="/search/physics?searchtype=author&query=Hardin%2C+J">John Hardin</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">Jim Kelsey</a>, <a href="/search/physics?searchtype=author&query=Patsyuk%2C+M">Maria Patsyuk</a>, <a href="/search/physics?searchtype=author&query=Schwartz%2C+C">Carsten Schwartz</a>, <a href="/search/physics?searchtype=author&query=Schwiening%2C+J">Jochen Schwiening</a>, <a href="/search/physics?searchtype=author&query=Shepherd%2C+M">Matthew Shepherd</a>, <a href="/search/physics?searchtype=author&query=Whitlatch%2C+T">Tim Whitlatch</a>, <a href="/search/physics?searchtype=author&query=Williams%2C+M">Michael Williams</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="1606.05645v2-abstract-short" style="display: inline;"> The GlueX experiment was designed to search for and study the pattern of gluonic excitations in the meson spectrum produced through photoproduction reactions at a new tagged photon beam facility in Hall D at Jefferson Laboratory. The particle identification capabilities of the GlueX experiment will be enhanced by constructing a DIRC (Detection of Internally Reflected Cherenkov light) detector, uti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.05645v2-abstract-full').style.display = 'inline'; document.getElementById('1606.05645v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1606.05645v2-abstract-full" style="display: none;"> The GlueX experiment was designed to search for and study the pattern of gluonic excitations in the meson spectrum produced through photoproduction reactions at a new tagged photon beam facility in Hall D at Jefferson Laboratory. The particle identification capabilities of the GlueX experiment will be enhanced by constructing a DIRC (Detection of Internally Reflected Cherenkov light) detector, utilizing components of the decommissioned BaBar DIRC. The DIRC will allow systematic studies of kaon final states that are essential for inferring the quark flavor content of both hybrid and conventional mesons. The design for the GlueX DIRC is presented, including the new expansion volumes that are currently under development. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.05645v2-abstract-full').style.display = 'none'; document.getElementById('1606.05645v2-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 July, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">8 pages, 6 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/1412.4717">arXiv:1412.4717</a> <span> [<a href="https://arxiv.org/pdf/1412.4717">pdf</a>, <a href="https://arxiv.org/format/1412.4717">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> The DarkLight Experiment: A Precision Search for New Physics at Low Energies </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/physics?searchtype=author&query=Bernauer%2C+J">J. Bernauer</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Corliss%2C+R">R. Corliss</a>, <a href="/search/physics?searchtype=author&query=Cowan%2C+R">R. Cowan</a>, <a href="/search/physics?searchtype=author&query=Epstein%2C+C">C. Epstein</a>, <a href="/search/physics?searchtype=author&query=Fisher%2C+P">P. Fisher</a>, <a href="/search/physics?searchtype=author&query=Hasell%2C+D">D. Hasell</a>, <a href="/search/physics?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/physics?searchtype=author&query=Kahn%2C+Y">Y. Kahn</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">J. Kelsey</a>, <a href="/search/physics?searchtype=author&query=Milner%2C+R">R. Milner</a>, <a href="/search/physics?searchtype=author&query=Steadman%2C+S">S. Steadman</a>, <a href="/search/physics?searchtype=author&query=Thaler%2C+J">J. Thaler</a>, <a href="/search/physics?searchtype=author&query=Tschalaer%2C+C">C. Tschalaer</a>, <a href="/search/physics?searchtype=author&query=Vidal%2C+C">C. Vidal</a>, <a href="/search/physics?searchtype=author&query=Benson%2C+S">S. Benson</a>, <a href="/search/physics?searchtype=author&query=Boyce%2C+J">J. Boyce</a>, <a href="/search/physics?searchtype=author&query=Douglas%2C+D">D. Douglas</a>, <a href="/search/physics?searchtype=author&query=Evtushenko%2C+P">P. Evtushenko</a>, <a href="/search/physics?searchtype=author&query=Hernandez-Garcia%2C+C">C. Hernandez-Garcia</a>, <a href="/search/physics?searchtype=author&query=Keith%2C+C">C. Keith</a>, <a href="/search/physics?searchtype=author&query=Tennant%2C+C">C. Tennant</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+S">S. Zhang</a>, <a href="/search/physics?searchtype=author&query=Alarcon%2C+R">R. Alarcon</a> , et al. (15 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1412.4717v1-abstract-short" style="display: inline;"> We describe the current status of the DarkLight experiment at Jefferson Laboratory. DarkLight is motivated by the possibility that a dark photon in the mass range 10 to 100 MeV/c$^2$ could couple the dark sector to the Standard Model. DarkLight will precisely measure electron proton scattering using the 100 MeV electron beam of intensity 5 mA at the Jefferson Laboratory energy recovering linac inc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.4717v1-abstract-full').style.display = 'inline'; document.getElementById('1412.4717v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1412.4717v1-abstract-full" style="display: none;"> We describe the current status of the DarkLight experiment at Jefferson Laboratory. DarkLight is motivated by the possibility that a dark photon in the mass range 10 to 100 MeV/c$^2$ could couple the dark sector to the Standard Model. DarkLight will precisely measure electron proton scattering using the 100 MeV electron beam of intensity 5 mA at the Jefferson Laboratory energy recovering linac incident on a windowless gas target of molecular hydrogen. The complete final state including scattered electron, recoil proton, and e+e- pair will be detected. A phase-I experiment has been funded and is expected to take data in the next eighteen months. The complete phase-II experiment is under final design and could run within two years after phase-I is completed. The DarkLight experiment drives development of new technology for beam, target, and detector and provides a new means to carry out electron scattering experiments at low momentum transfers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.4717v1-abstract-full').style.display = 'none'; document.getElementById('1412.4717v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 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">Whitepaper submitted to Town Meeting on Fundamental and Symmetries and Neutrinos, O'Hare airport, Chicago, IL</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1409.7100">arXiv:1409.7100</a> <span> [<a href="https://arxiv.org/pdf/1409.7100">pdf</a>, <a href="https://arxiv.org/format/1409.7100">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> <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"> The Q_weak Experimental Apparatus </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Qweak+Collaboration"> Qweak Collaboration</a>, <a href="/search/physics?searchtype=author&query=Allison%2C+T">T. Allison</a>, <a href="/search/physics?searchtype=author&query=Anderson%2C+M">M. Anderson</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=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/physics?searchtype=author&query=Averett%2C+T+D">T. D. Averett</a>, <a href="/search/physics?searchtype=author&query=Averill%2C+R">R. Averill</a>, <a href="/search/physics?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/physics?searchtype=author&query=Beaufait%2C+J">J. Beaufait</a>, <a href="/search/physics?searchtype=author&query=Beminiwattha%2C+R+S">R. S. Beminiwattha</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=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Birchall%2C+J">J. Birchall</a>, <a href="/search/physics?searchtype=author&query=Bonnell%2C+E">E. Bonnell</a>, <a href="/search/physics?searchtype=author&query=Bowman%2C+J">J. Bowman</a>, <a href="/search/physics?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/physics?searchtype=author&query=Brown%2C+D+B">D. B. Brown</a>, <a href="/search/physics?searchtype=author&query=Carlini%2C+R+D">R. D. Carlini</a>, <a href="/search/physics?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/physics?searchtype=author&query=Cavness%2C+B">B. Cavness</a>, <a href="/search/physics?searchtype=author&query=Clark%2C+G">G. Clark</a>, <a href="/search/physics?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/physics?searchtype=author&query=Dusa%2C+S+C">S. Covrig Dusa</a> , et al. (104 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="1409.7100v2-abstract-short" style="display: inline;"> The Jefferson Lab Q_weak experiment determined the weak charge of the proton by measuring the parity-violating elastic scattering asymmetry of longitudinally polarized electrons from an unpolarized liquid hydrogen target at small momentum transfer. A custom apparatus was designed for this experiment to meet the technical challenges presented by the smallest and most precise ${\vec{e}}$p asymmetry… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.7100v2-abstract-full').style.display = 'inline'; document.getElementById('1409.7100v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1409.7100v2-abstract-full" style="display: none;"> The Jefferson Lab Q_weak experiment determined the weak charge of the proton by measuring the parity-violating elastic scattering asymmetry of longitudinally polarized electrons from an unpolarized liquid hydrogen target at small momentum transfer. A custom apparatus was designed for this experiment to meet the technical challenges presented by the smallest and most precise ${\vec{e}}$p asymmetry ever measured. Technical milestones were achieved at Jefferson Lab in target power, beam current, beam helicity reversal rate, polarimetry, detected rates, and control of helicity-correlated beam properties. The experiment employed 180 microA of 89% longitudinally polarized electrons whose helicity was reversed 960 times per second. The electrons were accelerated to 1.16 GeV and directed to a beamline with extensive instrumentation to measure helicity-correlated beam properties that can induce false asymmetries. Moller and Compton polarimetry were used to measure the electron beam polarization to better than 1%. The electron beam was incident on a 34.4 cm liquid hydrogen target. After passing through a triple collimator system, scattered electrons between 5.8 degrees and 11.6 degrees were bent in the toroidal magnetic field of a resistive copper-coil magnet. The electrons inside this acceptance were focused onto eight fused silica Cerenkov detectors arrayed symmetrically around the beam axis. A total scattered electron rate of about 7 GHz was incident on the detector array. The detectors were read out in integrating mode by custom-built low-noise pre-amplifiers and 18-bit sampling ADC modules. The momentum transfer Q^2 = 0.025 GeV^2 was determined using dedicated low-current (~100 pA) measurements with a set of drift chambers before (and a set of drift chambers and trigger scintillation counters after) the toroidal magnet. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.7100v2-abstract-full').style.display = 'none'; document.getElementById('1409.7100v2-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 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">48 pages, 36 figures. Accepted by Nuclear Instruments and Methods A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLab-PHY-14-1959 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1409.6954">arXiv:1409.6954</a> <span> [<a href="https://arxiv.org/pdf/1409.6954">pdf</a>, <a href="https://arxiv.org/format/1409.6954">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> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevSTAB.17.120701">10.1103/PhysRevSTAB.17.120701 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Compact x-ray source based on burst-mode inverse Compton scattering at 100 kHz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Graves%2C+W+S">W. S. Graves</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Brown%2C+P">P. Brown</a>, <a href="/search/physics?searchtype=author&query=Carbajo%2C+S">S. Carbajo</a>, <a href="/search/physics?searchtype=author&query=Dolgashev%2C+V">V. Dolgashev</a>, <a href="/search/physics?searchtype=author&query=Hong%2C+K+-">K. -H. Hong</a>, <a href="/search/physics?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/physics?searchtype=author&query=Khaykovich%2C+B">B. Khaykovich</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+H">H. Lin</a>, <a href="/search/physics?searchtype=author&query=Murari%2C+K">K. Murari</a>, <a href="/search/physics?searchtype=author&query=Nanni%2C+E+A">E. A. Nanni</a>, <a href="/search/physics?searchtype=author&query=Resta%2C+G">G. Resta</a>, <a href="/search/physics?searchtype=author&query=Tantawi%2C+S">S. Tantawi</a>, <a href="/search/physics?searchtype=author&query=Zapata%2C+L+E">L. E. Zapata</a>, <a href="/search/physics?searchtype=author&query=K%C3%A4rtner%2C+F+X">F. X. K盲rtner</a>, <a href="/search/physics?searchtype=author&query=Moncton%2C+D+E">D. E. Moncton</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="1409.6954v2-abstract-short" style="display: inline;"> A design for a compact x-ray light source (CXLS) with flux and brilliance orders of magnitude beyond existing laboratory scale sources is presented. The source is based on inverse Compton scattering of a high brightness electron bunch on a picosecond laser pulse. The accelerator is a novel high-efficiency standing-wave linac and RF photoinjector powered by a single ultrastable RF transmitter at x-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.6954v2-abstract-full').style.display = 'inline'; document.getElementById('1409.6954v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1409.6954v2-abstract-full" style="display: none;"> A design for a compact x-ray light source (CXLS) with flux and brilliance orders of magnitude beyond existing laboratory scale sources is presented. The source is based on inverse Compton scattering of a high brightness electron bunch on a picosecond laser pulse. The accelerator is a novel high-efficiency standing-wave linac and RF photoinjector powered by a single ultrastable RF transmitter at x-band RF frequency. The high efficiency permits operation at repetition rates up to 1 kHz, which is further boosted to 100 kHz by operating with trains of 100 bunches of 100 pC charge, each separated by 5 ns. The entire accelerator is approximately 1 meter long and produces hard x-rays tunable over a wide range of photon energies. The colliding laser is a Yb:YAG solid-state amplifier producing 1030 nm, 100 mJ pulses at the same 1 kHz repetition rate as the accelerator. The laser pulse is frequency-doubled and stored for many passes in a ringdown cavity to match the linac pulse structure. At a photon energy of 12.4 keV, the predicted x-ray flux is $5 \times 10^{11}$ photons/second in a 5% bandwidth and the brilliance is $2 \times 10^{12}\mathrm{photons/(sec\ mm^2\ mrad^2\ 0.1\%)}$ in pulses with RMS pulse length of 490 fs. The nominal electron beam parameters are 18 MeV kinetic energy, 10 microamp average current, 0.5 microsecond macropulse length, resulting in average electron beam power of 180 W. Optimization of the x-ray output is presented along with design of the accelerator, laser, and x-ray optic components that are specific to the particular characteristics of the Compton scattered x-ray pulses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.6954v2-abstract-full').style.display = 'none'; document.getElementById('1409.6954v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">25 pages, 24 figures, 54 references</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.0993">arXiv:1404.0993</a> <span> [<a href="https://arxiv.org/pdf/1404.0993">pdf</a>, <a href="https://arxiv.org/format/1404.0993">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Design and Fabrication of a Highly Integrated Silicon Detector for the STAR Experiment at Brookhaven National Laboratory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Buck%2C+B">Benjamin Buck</a>, <a href="/search/physics?searchtype=author&query=Anderssen%2C+E">Eric Anderssen</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">Jason Bessuille</a>, <a href="/search/physics?searchtype=author&query=Cepeda%2C+M">Mario Cepeda</a>, <a href="/search/physics?searchtype=author&query=Johnson%2C+T">Thomas Johnson</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">James Kelsey</a>, <a href="/search/physics?searchtype=author&query=van+Nieuwenhuizen%2C+G">Gerrit van Nieuwenhuizen</a>, <a href="/search/physics?searchtype=author&query=Visser%2C+G">Gerard Visser</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="1404.0993v1-abstract-short" style="display: inline;"> We present the design of a detector used as a particle tracking device in the STAR experiment at the RHIC collider of Brookhaven National Laboratories. The "stave," 24 of which make up the completed detector, is a highly mechanically integrated design comprised of 6 custom silicon sensors mounted on a Kapton substrate. 4608 wire bonds connect these sensors to 36 analog front-end chips which are mo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.0993v1-abstract-full').style.display = 'inline'; document.getElementById('1404.0993v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.0993v1-abstract-full" style="display: none;"> We present the design of a detector used as a particle tracking device in the STAR experiment at the RHIC collider of Brookhaven National Laboratories. The "stave," 24 of which make up the completed detector, is a highly mechanically integrated design comprised of 6 custom silicon sensors mounted on a Kapton substrate. 4608 wire bonds connect these sensors to 36 analog front-end chips which are mounted on the same substrate. Power and signal connectivity from the hybrid to the front-end chips is provided by wire bonds. The entire circuit is mounted on a carbon fiber base co-cured to the Kapton substrate. We present the unique design challenges for this detector and some novel techniques for overcoming them. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.0993v1-abstract-full').style.display = 'none'; document.getElementById('1404.0993v1-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 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">14 Pages, 17 Figures. Submitted to New England iMAPS 2014 Symposium and Expo</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.1730">arXiv:1312.1730</a> <span> [<a href="https://arxiv.org/pdf/1312.1730">pdf</a>, <a href="https://arxiv.org/format/1312.1730">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2013.12.035">10.1016/j.nima.2013.12.035 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The OLYMPUS Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Milner%2C+R">R. Milner</a>, <a href="/search/physics?searchtype=author&query=Hasell%2C+D+K">D. K. Hasell</a>, <a href="/search/physics?searchtype=author&query=Kohl%2C+M">M. Kohl</a>, <a href="/search/physics?searchtype=author&query=Schneekloth%2C+U">U. Schneekloth</a>, <a href="/search/physics?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/physics?searchtype=author&query=Alarcon%2C+R">R. Alarcon</a>, <a href="/search/physics?searchtype=author&query=Andreev%2C+V+A">V. A. Andreev</a>, <a href="/search/physics?searchtype=author&query=Ates%2C+O">O. Ates</a>, <a href="/search/physics?searchtype=author&query=Avetisyan%2C+A">A. Avetisyan</a>, <a href="/search/physics?searchtype=author&query=Bayadilov%2C+D">D. Bayadilov</a>, <a href="/search/physics?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/physics?searchtype=author&query=Belostotski%2C+S">S. Belostotski</a>, <a href="/search/physics?searchtype=author&query=Bernauer%2C+J+C">J. C. Bernauer</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Brinker%2C+F">F. Brinker</a>, <a href="/search/physics?searchtype=author&query=Buck%2C+B">B. Buck</a>, <a href="/search/physics?searchtype=author&query=Calarco%2C+J+R">J. R. Calarco</a>, <a href="/search/physics?searchtype=author&query=Carassiti%2C+V">V. Carassiti</a>, <a href="/search/physics?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/physics?searchtype=author&query=Ciullo%2C+G">G. Ciullo</a>, <a href="/search/physics?searchtype=author&query=Contalbrigo%2C+M">M. Contalbrigo</a>, <a href="/search/physics?searchtype=author&query=D%27Ascenzo%2C+N">N. D'Ascenzo</a>, <a href="/search/physics?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/physics?searchtype=author&query=Diefenbach%2C+J">J. Diefenbach</a>, <a href="/search/physics?searchtype=author&query=Donnelly%2C+T+W">T. W. Donnelly</a> , et al. (48 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1312.1730v1-abstract-short" style="display: inline;"> The OLYMPUS experiment was designed to measure the ratio between the positron-proton and electron-proton elastic scattering cross sections, with the goal of determining the contribution of two-photon exchange to the elastic cross section. Two-photon exchange might resolve the discrepancy between measurements of the proton form factor ratio, $渭_p G^p_E/G^p_M$, made using polarization techniques and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.1730v1-abstract-full').style.display = 'inline'; document.getElementById('1312.1730v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.1730v1-abstract-full" style="display: none;"> The OLYMPUS experiment was designed to measure the ratio between the positron-proton and electron-proton elastic scattering cross sections, with the goal of determining the contribution of two-photon exchange to the elastic cross section. Two-photon exchange might resolve the discrepancy between measurements of the proton form factor ratio, $渭_p G^p_E/G^p_M$, made using polarization techniques and those made in unpolarized experiments. OLYMPUS operated on the DORIS storage ring at DESY, alternating between 2.01~GeV electron and positron beams incident on an internal hydrogen gas target. The experiment used a toroidal magnetic spectrometer instrumented with drift chambers and time-of-flight detectors to measure rates for elastic scattering over the polar angular range of approximately $25^\circ$--$75^\circ$. Symmetric M酶ller/Bhabha calorimeters at $1.29^\circ$ and telescopes of GEM and MWPC detectors at $12^\circ$ served as luminosity monitors. A total luminosity of approximately 4.5~fb$^{-1}$ was collected over two running periods in 2012. This paper provides details on the accelerator, target, detectors, and operation of the experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.1730v1-abstract-full').style.display = 'none'; document.getElementById('1312.1730v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">40 pages, 26 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Inst. and Methods in Physics Research, A (2014) pp. 1-17 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.4432">arXiv:1307.4432</a> <span> [<a href="https://arxiv.org/pdf/1307.4432">pdf</a>, <a href="https://arxiv.org/format/1307.4432">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"> DarkLight: A Search for Dark Forces at the Jefferson Laboratory Free-Electron Laser Facility </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/physics?searchtype=author&query=Bernauer%2C+J">J. Bernauer</a>, <a href="/search/physics?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/physics?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/physics?searchtype=author&query=Buck%2C+B">B. Buck</a>, <a href="/search/physics?searchtype=author&query=Cowan%2C+R">R. Cowan</a>, <a href="/search/physics?searchtype=author&query=Dow%2C+K">K. Dow</a>, <a href="/search/physics?searchtype=author&query=Epstein%2C+C">C. Epstein</a>, <a href="/search/physics?searchtype=author&query=Fisher%2C+P">P. Fisher</a>, <a href="/search/physics?searchtype=author&query=Gilad%2C+S">S. Gilad</a>, <a href="/search/physics?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/physics?searchtype=author&query=Kahn%2C+Y">Y. Kahn</a>, <a href="/search/physics?searchtype=author&query=Kelleher%2C+A">A. Kelleher</a>, <a href="/search/physics?searchtype=author&query=Kelsey%2C+J">J. Kelsey</a>, <a href="/search/physics?searchtype=author&query=Milner%2C+R">R. Milner</a>, <a href="/search/physics?searchtype=author&query=Moran%2C+C">C. Moran</a>, <a href="/search/physics?searchtype=author&query=Ou%2C+L">L. Ou</a>, <a href="/search/physics?searchtype=author&query=Russell%2C+R">R. Russell</a>, <a href="/search/physics?searchtype=author&query=Schmookler%2C+B">B. Schmookler</a>, <a href="/search/physics?searchtype=author&query=Thaler%2C+J">J. Thaler</a>, <a href="/search/physics?searchtype=author&query=Tschal%C3%A4r%2C+C">C. Tschal盲r</a>, <a href="/search/physics?searchtype=author&query=Vidal%2C+C">C. Vidal</a>, <a href="/search/physics?searchtype=author&query=Winnebeck%2C+A">A. Winnebeck</a>, <a href="/search/physics?searchtype=author&query=Benson%2C+S">S. Benson</a>, <a href="/search/physics?searchtype=author&query=Gould%2C+C">C. Gould</a> , et al. (42 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1307.4432v2-abstract-short" style="display: inline;"> We give a short overview of the DarkLight detector concept which is designed to search for a heavy photon A' with a mass in the range 10 MeV/c^2 < m(A') < 90 MeV/c^2 and which decays to lepton pairs. We describe the intended operating environment, the Jefferson Laboratory free electon laser, and a way to extend DarkLight's reach using A' --> invisible decays. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.4432v2-abstract-full" style="display: none;"> We give a short overview of the DarkLight detector concept which is designed to search for a heavy photon A' with a mass in the range 10 MeV/c^2 < m(A') < 90 MeV/c^2 and which decays to lepton pairs. We describe the intended operating environment, the Jefferson Laboratory free electon laser, and a way to extend DarkLight's reach using A' --> invisible decays. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.4432v2-abstract-full').style.display = 'none'; document.getElementById('1307.4432v2-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 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 figures, contributed to the Community Summer Study 2013 "Snowmass on the Mississippi" in the New, Light, Weakly Coupled Particles (NLWCP) subgroup of the Intensity Frontier</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 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 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