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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/2308.01658">arXiv:2308.01658</a> <span> [<a href="https://arxiv.org/pdf/2308.01658">pdf</a>, <a href="https://arxiv.org/format/2308.01658">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2023.168579">10.1016/j.nima.2023.168579 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Long term experience with perfluorobutane in COMPASS RICH </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/nucl-ex?searchtype=author&query=Crespo%2C+M+L">M. L. Crespo</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Florian%2C+W">W. Florian</a>, <a href="/search/nucl-ex?searchtype=author&query=Ordonez%2C+L+G">L. Garcia Ordonez</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Kerbizi%2C+A">A. Kerbizi</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Molina%2C+R+S">R. S. Molina</a>, <a href="/search/nucl-ex?searchtype=author&query=Moretti%2C+A">A. Moretti</a>, <a href="/search/nucl-ex?searchtype=author&query=Tessarotto%2C+F">F. Tessarotto</a>, <a href="/search/nucl-ex?searchtype=author&query=Triloki"> Triloki</a>, <a href="/search/nucl-ex?searchtype=author&query=Valinoti%2C+B">B. Valinoti</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="2308.01658v1-abstract-short" style="display: inline;"> COMPASS RICH-1 has used high-purity perfluorobutane as radiator gas since 2001. The operation and control of the radiator gas has evolved over years with continuous improvements. We report on the experience gained in the 20 year-long operation of perfluorobutane as COMPASS RICH radiator. Very accurate values for the radiator gas refractive index are needed for high-performance particle identificat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.01658v1-abstract-full').style.display = 'inline'; document.getElementById('2308.01658v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.01658v1-abstract-full" style="display: none;"> COMPASS RICH-1 has used high-purity perfluorobutane as radiator gas since 2001. The operation and control of the radiator gas has evolved over years with continuous improvements. We report on the experience gained in the 20 year-long operation of perfluorobutane as COMPASS RICH radiator. Very accurate values for the radiator gas refractive index are needed for high-performance particle identification. The procedure has evolved over years and the one presently in use, which provides refractive index estimate at the 1 ppm level, is discussed. Perfluorobutane procurement is becoming challenging, and the minimization of material waste is now a priority for the protection of the environment. Commercially available perfluorobutane needs dedicated filtering before usage and typical material losses in the filtering procedure were around 30%. Recent efforts allowed us to reduce them to about 5%. A potential alternative to fluorocarbon radiators in gaseous RICHes is also presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.01658v1-abstract-full').style.display = 'none'; document.getElementById('2308.01658v1-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 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 3 figures 2 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/2210.09048">arXiv:2210.09048</a> <span> [<a href="https://arxiv.org/pdf/2210.09048">pdf</a>, <a href="https://arxiv.org/format/2210.09048">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"> ATHENA Detector Proposal -- A Totally Hermetic Electron Nucleus Apparatus proposed for IP6 at the Electron-Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=ATHENA+Collaboration"> ATHENA Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Agrawal%2C+N">N. Agrawal</a>, <a href="/search/nucl-ex?searchtype=author&query=Aidala%2C+C">C. Aidala</a>, <a href="/search/nucl-ex?searchtype=author&query=Akers%2C+W">W. Akers</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+M">M. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Allen%2C+M+M">M. M. Allen</a>, <a href="/search/nucl-ex?searchtype=author&query=Ameli%2C+F">F. Ameli</a>, <a href="/search/nucl-ex?searchtype=author&query=Angerami%2C+A">A. Angerami</a>, <a href="/search/nucl-ex?searchtype=author&query=Antonioli%2C+P">P. Antonioli</a>, <a href="/search/nucl-ex?searchtype=author&query=Apadula%2C+N+J">N. J. Apadula</a>, <a href="/search/nucl-ex?searchtype=author&query=Aprahamian%2C+A">A. Aprahamian</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arratia%2C+M">M. Arratia</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J+R">J. R. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/nucl-ex?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Baldanza%2C+C">C. Baldanza</a>, <a href="/search/nucl-ex?searchtype=author&query=Bansal%2C+M">M. Bansal</a>, <a href="/search/nucl-ex?searchtype=author&query=Barbosa%2C+F">F. Barbosa</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a> , et al. (415 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.09048v1-abstract-short" style="display: inline;"> ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine tracking and momentum resolution, high performance electromagnetic and hadronic calorimetry, hadron identification over a wide kinematic range, and near-complete hermeticity. This article describes the detector design and its e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.09048v1-abstract-full').style.display = 'inline'; document.getElementById('2210.09048v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.09048v1-abstract-full" style="display: none;"> ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine tracking and momentum resolution, high performance electromagnetic and hadronic calorimetry, hadron identification over a wide kinematic range, and near-complete hermeticity. This article describes the detector design and its expected performance in the most relevant physics channels. It includes an evaluation of detector technology choices, the technical challenges to realizing the detector and the R&D required to meet those challenges. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.09048v1-abstract-full').style.display = 'none'; document.getElementById('2210.09048v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 17 (2022) 10, P10019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.05419">arXiv:2103.05419</a> <span> [<a href="https://arxiv.org/pdf/2103.05419">pdf</a>, <a href="https://arxiv.org/format/2103.05419">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="High Energy Physics - Phenomenology">hep-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="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nuclphysa.2022.122447">10.1016/j.nuclphysa.2022.122447 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Khalek%2C+R+A">R. Abdul Khalek</a>, <a href="/search/nucl-ex?searchtype=author&query=Accardi%2C+A">A. Accardi</a>, <a href="/search/nucl-ex?searchtype=author&query=Adam%2C+J">J. Adam</a>, <a href="/search/nucl-ex?searchtype=author&query=Adamiak%2C+D">D. Adamiak</a>, <a href="/search/nucl-ex?searchtype=author&query=Akers%2C+W">W. Akers</a>, <a href="/search/nucl-ex?searchtype=author&query=Albaladejo%2C+M">M. Albaladejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Al-bataineh%2C+A">A. Al-bataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Ameli%2C+F">F. Ameli</a>, <a href="/search/nucl-ex?searchtype=author&query=Antonioli%2C+P">P. Antonioli</a>, <a href="/search/nucl-ex?searchtype=author&query=Armesto%2C+N">N. Armesto</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W+R">W. R. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arratia%2C+M">M. Arratia</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Asai%2C+M">M. Asai</a>, <a href="/search/nucl-ex?searchtype=author&query=Aschenauer%2C+E+C">E. C. Aschenauer</a>, <a href="/search/nucl-ex?searchtype=author&query=Aune%2C+S">S. Aune</a>, <a href="/search/nucl-ex?searchtype=author&query=Avagyan%2C+H">H. Avagyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Azmoun%2C+B">B. Azmoun</a>, <a href="/search/nucl-ex?searchtype=author&query=Bacchetta%2C+A">A. Bacchetta</a>, <a href="/search/nucl-ex?searchtype=author&query=Baker%2C+M+D">M. D. Baker</a>, <a href="/search/nucl-ex?searchtype=author&query=Barbosa%2C+F">F. Barbosa</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a> , et al. (390 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="2103.05419v3-abstract-short" style="display: inline;"> This report describes the physics case, the resulting detector requirements, and the evolving detector concepts for the experimental program at the Electron-Ion Collider (EIC). The EIC will be a powerful new high-luminosity facility in the United States with the capability to collide high-energy electron beams with high-energy proton and ion beams, providing access to those regions in the nucleon… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.05419v3-abstract-full').style.display = 'inline'; document.getElementById('2103.05419v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.05419v3-abstract-full" style="display: none;"> This report describes the physics case, the resulting detector requirements, and the evolving detector concepts for the experimental program at the Electron-Ion Collider (EIC). The EIC will be a powerful new high-luminosity facility in the United States with the capability to collide high-energy electron beams with high-energy proton and ion beams, providing access to those regions in the nucleon and nuclei where their structure is dominated by gluons. Moreover, polarized beams in the EIC will give unprecedented access to the spatial and spin structure of the proton, neutron, and light ions. The studies leading to this document were commissioned and organized by the EIC User Group with the objective of advancing the state and detail of the physics program and developing detector concepts that meet the emerging requirements in preparation for the realization of the EIC. The effort aims to provide the basis for further development of concepts for experimental equipment best suited for the science needs, including the importance of two complementary detectors and interaction regions. This report consists of three volumes. Volume I is an executive summary of our findings and developed concepts. In Volume II we describe studies of a wide range of physics measurements and the emerging requirements on detector acceptance and performance. Volume III discusses general-purpose detector concepts and the underlying technologies to meet the physics requirements. These considerations will form the basis for a world-class experimental program that aims to increase our understanding of the fundamental structure of all visible matter <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.05419v3-abstract-full').style.display = 'none'; document.getElementById('2103.05419v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">902 pages, 415 authors, 151 institutions</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> BNL-220990-2021-FORE, JLAB-PHY-21-3198, LA-UR-21-20953 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Phys. A 1026 (2022) 122447 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.11791">arXiv:2003.11791</a> <span> [<a href="https://arxiv.org/pdf/2003.11791">pdf</a>, <a href="https://arxiv.org/format/2003.11791">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2020.135600">10.1016/j.physletb.2020.135600 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Antiproton over proton and K$^-$ over K$^+$ multiplicity ratios at high $z$ in DIS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/nucl-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Antequera%2C+J+B">J. Berenguer Antequera</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a>, <a href="/search/nucl-ex?searchtype=author&query=Burtsev%2C+V+E">V. E. Burtsev</a>, <a href="/search/nucl-ex?searchtype=author&query=Chang%2C+W+-">W. -C. Chang</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a> , et al. (174 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="2003.11791v1-abstract-short" style="display: inline;"> The $\bar{\rm p} $ over p multiplicity ratio is measured in deep-inelastic scattering for the first time using (anti-) protons carrying a large fraction of the virtual-photon energy, $z>0.5$. The data were obtained by the COMPASS Collaboration using a 160 GeV muon beam impinging on an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2$ > 1 (GeV/$c$)$^2$… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.11791v1-abstract-full').style.display = 'inline'; document.getElementById('2003.11791v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.11791v1-abstract-full" style="display: none;"> The $\bar{\rm p} $ over p multiplicity ratio is measured in deep-inelastic scattering for the first time using (anti-) protons carrying a large fraction of the virtual-photon energy, $z>0.5$. The data were obtained by the COMPASS Collaboration using a 160 GeV muon beam impinging on an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2$ > 1 (GeV/$c$)$^2$ for the photon virtuality and $W > 5$ GeV/$c^2$ for the invariant mass of the produced hadronic system. The range in Bjorken-$x$ is restricted to $0.01 < x < 0.40$. Protons and antiprotons are identified in the momentum range $20 梅60$ GeV/$c$. In the whole studied $z$-region, the $\bar{\rm p}$ over p multiplicity ratio is found to be below the lower limit expected from calculations based on leading-order perturbative Quantum Chromodynamics (pQCD). Extending our earlier analysis of the K$^-$ over K$^+$ multiplicity ratio by including now events with larger virtual-photon energies, this ratio becomes closer to the expectation of next-to-leading order pQCD. The results of both analyses strengthen our earlier conclusion that the phase space available for hadronisation should be taken into account in the pQCD formalism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.11791v1-abstract-full').style.display = 'none'; document.getElementById('2003.11791v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 7 figures, 3 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2020-041 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.10482">arXiv:1907.10482</a> <span> [<a href="https://arxiv.org/pdf/1907.10482">pdf</a>, <a href="https://arxiv.org/format/1907.10482">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/1498/1/012006">10.1088/1742-6596/1498/1/012006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The MPGD-Based Photon Detectors for the upgrade of COMPASS RICH-1 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M">M. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Buchele%2C+M">M. Buchele</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S">S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisov%2C+O">O. Denisov</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger Jr</a>, <a href="/search/nucl-ex?searchtype=author&query=Fischer%2C+H">H. Fischer</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamar%2C+G">G. Hamar</a>, <a href="/search/nucl-ex?searchtype=author&query=Herrmann%2C+F">F. Herrmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Panzieri%2C+D">D. Panzieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Sbrizzai%2C+G">G. Sbrizzai</a>, <a href="/search/nucl-ex?searchtype=author&query=Schopferer%2C+S">S. Schopferer</a>, <a href="/search/nucl-ex?searchtype=author&query=Slunecka%2C+M">M. Slunecka</a> , et al. (4 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="1907.10482v1-abstract-short" style="display: inline;"> After pioneering gaseous detectors of single photon for RICH applications using CsI solid state photocathodes in MWPCs within the RD26 collaboration and by the constructions for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four novel photon detectors, covering a total active area of 1.5~m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.10482v1-abstract-full').style.display = 'inline'; document.getElementById('1907.10482v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.10482v1-abstract-full" style="display: none;"> After pioneering gaseous detectors of single photon for RICH applications using CsI solid state photocathodes in MWPCs within the RD26 collaboration and by the constructions for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four novel photon detectors, covering a total active area of 1.5~m$^2$, have been installed in order to cope with the challenging efficiency and stability requirements of the COMPASS physics programme. They are the first application in an experiment of MPGD-based single photon detectors. All aspects of the upgrade are presented, including engineering, mass production, quality assessment and performance. Perspectives for further developments in the field of gaseous single photon detectors are also indicated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.10482v1-abstract-full').style.display = 'none'; document.getElementById('1907.10482v1-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 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">MPGD2019 proceedings, presented by Silvia Dalla Torre. arXiv admin note: substantial text overlap with arXiv:1807.00816</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.02385">arXiv:1907.02385</a> <span> [<a href="https://arxiv.org/pdf/1907.02385">pdf</a>, <a href="https://arxiv.org/format/1907.02385">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2019.162378">10.1016/j.nima.2019.162378 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The high voltage system with pressure and temperature corrections for the novel MPGD-based photon detectors of COMPASS RICH-1 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Bari%2C+M">M. Bari</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Crespo%2C+M">M. Crespo</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S">S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gobbo%2C+B">B. Gobbo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamar%2C+G">G. Hamar</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Rizzuto%2C+L+B">L. B. Rizzuto</a>, <a href="/search/nucl-ex?searchtype=author&query=Triloki"> Triloki</a>, <a href="/search/nucl-ex?searchtype=author&query=Tessarotto%2C+F">F. Tessarotto</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+Y+X">Y. X. 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="1907.02385v1-abstract-short" style="display: inline;"> The novel MPGD-based photon detectors of COMPASS RICH-1 consist of large-size hybrid MPGDs with multi-layer architecture including two layers of Thick-GEMs and a bulk resistive MicroMegas. The top surface of the first THGEM is coated with a CsI film which also acts as photo-cathode. These detectors have been successfully in operation at COMPASS since 2016. Concerning bias-voltage supply, the Thick… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.02385v1-abstract-full').style.display = 'inline'; document.getElementById('1907.02385v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.02385v1-abstract-full" style="display: none;"> The novel MPGD-based photon detectors of COMPASS RICH-1 consist of large-size hybrid MPGDs with multi-layer architecture including two layers of Thick-GEMs and a bulk resistive MicroMegas. The top surface of the first THGEM is coated with a CsI film which also acts as photo-cathode. These detectors have been successfully in operation at COMPASS since 2016. Concerning bias-voltage supply, the Thick-GEMs are segmented in order to reduce the energy released in case of occasional discharges, while the MicroMegas anode is segmented into pads individually biased with positive voltage while the micromesh is grounded. In total, there are about ten different electrode types and more than 20000 electrodes supplied by more than 100 HV channels, where appropriate correlations among the applied voltages are required for the correct operation of the detectors. Therefore, a robust control system is mandatory, implemented by a custom designed software package, while commercial power supply units are used. This sophisticated control system allows to protect the detectors against errors by the operator, to monitor and log voltages and currents at 1 Hz rate, and automatically react to detector misbehaviour. In addition, a voltage compensation system has been developed to automatically adjust the biasing voltage according to environmental pressure and temperature variations, to achieve constant gain over time. This development answers to a more general need. In fact, voltage compensation is always a requirement for the stability of gaseous detectors and its need is enhanced in multi-layer ones. In this paper, the HV system and its performance are described in details, as well as the stability of the novel MPGD-based photon detectors during the physics data taking at COMPASS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.02385v1-abstract-full').style.display = 'none'; document.getElementById('1907.02385v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, NIM.A paper</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.06971">arXiv:1812.06971</a> <span> [<a href="https://arxiv.org/pdf/1812.06971">pdf</a>, <a href="https://arxiv.org/format/1812.06971">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> The Hybrid MPGD-based photon detectors of COMPASS RICH-1 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M">M. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/nucl-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Crespo%2C+M+L">M. L. Crespo</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S">S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisov%2C+O">O. Denisov</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger Jr.</a>, <a href="/search/nucl-ex?searchtype=author&query=Fischer%2C+H">H. Fischer</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamar%2C+G">G. Hamar</a>, <a href="/search/nucl-ex?searchtype=author&query=Herrmann%2C+F">F. Herrmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Panzieri%2C+D">D. Panzieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Sbrizzai%2C+G">G. Sbrizzai</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1812.06971v1-abstract-short" style="display: inline;"> Novel gaseous detectors of single photons for RICH applications have been developed and installed on COMPASS RICH-1 in 2016. They have a hybrid architecture consisting of two staggered THGEM layers (one equipped with a CsI photoconverting layer) and a bulk Micromegas; they cover a total area of 1.4 squared meters and operate stably and efficiently. They provide a single photon angular resolution o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.06971v1-abstract-full').style.display = 'inline'; document.getElementById('1812.06971v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.06971v1-abstract-full" style="display: none;"> Novel gaseous detectors of single photons for RICH applications have been developed and installed on COMPASS RICH-1 in 2016. They have a hybrid architecture consisting of two staggered THGEM layers (one equipped with a CsI photoconverting layer) and a bulk Micromegas; they cover a total area of 1.4 squared meters and operate stably and efficiently. They provide a single photon angular resolution of ~ 1.8 mrad and about 10 detected photons per ring at saturation. The main aspects of their construction and commissioning, their characterization and performance figures are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.06971v1-abstract-full').style.display = 'none'; document.getElementById('1812.06971v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of RICH 2018 Workshop</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instr. Methods A 2018 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1807.01897">arXiv:1807.01897</a> <span> [<a href="https://arxiv.org/pdf/1807.01897">pdf</a>, <a href="https://arxiv.org/format/1807.01897">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2018.10.185">10.1016/j.nima.2018.10.185 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Optimized MPGD-based Photon Detectors for high momentum particle identification at the Electron-Ion Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S">S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Tessarotto%2C+F">F. Tessarotto</a>, <a href="/search/nucl-ex?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="1807.01897v1-abstract-short" style="display: inline;"> Particle IDentification (PID) is a central requirement of the experiments at the future EIC. Hadron PID at high momenta by RICH techniques requires the use of low density gaseous radiators, where the challenge is the limited length of the radiator region available at a collider experiment. By selecting a photon wavelength range in the far UV domain, around 120 nm, the number of detectable photons… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.01897v1-abstract-full').style.display = 'inline'; document.getElementById('1807.01897v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1807.01897v1-abstract-full" style="display: none;"> Particle IDentification (PID) is a central requirement of the experiments at the future EIC. Hadron PID at high momenta by RICH techniques requires the use of low density gaseous radiators, where the challenge is the limited length of the radiator region available at a collider experiment. By selecting a photon wavelength range in the far UV domain, around 120 nm, the number of detectable photons can be increased. Ideal sensors are gaseous Photon Detectors (PD) with CsI photocathode, where the status of the art is represented by the MPGD-based PDs at COMPASS RICH. Detector optimization is required for the application at EIC. Here we report about a dedicated prototype where the sensor pad-size has been reduced to preserve the angular resolution. A new DAQ system based on the SRS readout electronics has been developed for the laboratory and test beam studies of the prototype. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.01897v1-abstract-full').style.display = 'none'; document.getElementById('1807.01897v1-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 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings for PM2018- 14th Pisa Meeting on Advanced Detectors</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1807.00816">arXiv:1807.00816</a> <span> [<a href="https://arxiv.org/pdf/1807.00816">pdf</a>, <a href="https://arxiv.org/format/1807.00816">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2018.10.092">10.1016/j.nima.2018.10.092 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The MPGD-Based Photon Detectors for the upgrade of COMPASS RICH-1 and beyond </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M">M. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Buchele%2C+M">M. Buchele</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S">S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisov%2C+O">O. Denisov</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger Jr</a>, <a href="/search/nucl-ex?searchtype=author&query=Fischer%2C+H">H. Fischer</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamar%2C+G">G. Hamar</a>, <a href="/search/nucl-ex?searchtype=author&query=Herrmann%2C+F">F. Herrmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Panzieri%2C+D">D. Panzieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Sbrizzai%2C+G">G. Sbrizzai</a>, <a href="/search/nucl-ex?searchtype=author&query=Schopferer%2C+S">S. Schopferer</a>, <a href="/search/nucl-ex?searchtype=author&query=Slunecka%2C+M">M. Slunecka</a> , et al. (4 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="1807.00816v1-abstract-short" style="display: inline;"> After pioneering gaseous detectors of single photon for RICH applications using CsI solid state photocathodes in MWPCs within the RD26 collaboration and by the constructions for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four novel photon detectors, covering a total active area of 1.5~m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.00816v1-abstract-full').style.display = 'inline'; document.getElementById('1807.00816v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1807.00816v1-abstract-full" style="display: none;"> After pioneering gaseous detectors of single photon for RICH applications using CsI solid state photocathodes in MWPCs within the RD26 collaboration and by the constructions for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four novel photon detectors, covering a total active area of 1.5~m$^2$, have been installed in order to cope with the challenging efficiency and stability requirements of the COMPASS physics programme. These detectors are the first application in an experiment of MPGD-based single photon detectors. All aspects of the upgrade are presented, including engineering, mass production, quality assessment and performance. Perspectives for further developments in the field of gaseous single photon detectors are also presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.00816v1-abstract-full').style.display = 'none'; document.getElementById('1807.00816v1-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 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings for PM18-14th Pisa meeting on Advanced Detectors (presentation by Silvia Dalla Torre)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.05765">arXiv:1804.05765</a> <span> [<a href="https://arxiv.org/pdf/1804.05765">pdf</a>, <a href="https://arxiv.org/format/1804.05765">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> The novel photon detectors based on MPGD technologies for the upgrade of COMPASS RICH-1 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M">M. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/nucl-ex?searchtype=author&query=Cicuttin%2C+A">A. Cicuttin</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Crespo%2C+M+L">M. L. Crespo</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S+S">S. S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisov%2C+O">O. Denisov</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger Jr.</a>, <a href="/search/nucl-ex?searchtype=author&query=Gobbo%2C+B">B. Gobbo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamar%2C+G">G. Hamar</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Maggiora%2C+A">A. Maggiora</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Novy%2C+J">J. Novy</a>, <a href="/search/nucl-ex?searchtype=author&query=Panzieri%2C+D">D. Panzieri</a> , et al. (10 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="1804.05765v1-abstract-short" style="display: inline;"> The RICH-1 Detector of the COMPASS experiment at CERN SPS has undergone an important upgrade in 2016. Four new photon detectors, based on MPGD technology and covering a total active area larger than 1.2~$m^2$ have replaced the previously used MWPC-based photon detectors. The new detector architecture, resulting from a dedicated, eight years long, R\&D program, consists in a hybrid MPGD combination… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.05765v1-abstract-full').style.display = 'inline'; document.getElementById('1804.05765v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.05765v1-abstract-full" style="display: none;"> The RICH-1 Detector of the COMPASS experiment at CERN SPS has undergone an important upgrade in 2016. Four new photon detectors, based on MPGD technology and covering a total active area larger than 1.2~$m^2$ have replaced the previously used MWPC-based photon detectors. The new detector architecture, resulting from a dedicated, eight years long, R\&D program, consists in a hybrid MPGD combination of two THGEMs and a Micromegas stage; the first THGEM, coated with a CsI layer, acts as a reflective photocathode. The signals are extracted from the anode pads by capacitive coupling and read-out by analog front-end electronics based on the APV25 chip. The new COMPASS RICH-1 photon detectors are described in detail: the detector design, the engineering aspects, the mass production, and the quality assessment are discussed. The assembly of the MPGD components and the installation of the new detectors are illustrated together with the main aspects of the commissioning. Preliminary indication of performance results are also presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.05765v1-abstract-full').style.display = 'none'; document.getElementById('1804.05765v1-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 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </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">5th International Conference on Micro-Pattern Gas Detectors (MPGD2017), speaker: F.Tessarotto (INFN -Trieste)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1803.01667">arXiv:1803.01667</a> <span> [<a href="https://arxiv.org/pdf/1803.01667">pdf</a>, <a href="https://arxiv.org/format/1803.01667">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> The high voltage system for the novel MPGD-based photon detectors of COMPASS RICH-1 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Chatterjee%2C+C">C. Chatterjee</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S">S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gobbo%2C+B">B. Gobbo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamar%2C+G">G. Hamar</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Tessarotto%2C+F">F. Tessarotto</a>, <a href="/search/nucl-ex?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="1803.01667v1-abstract-short" style="display: inline;"> The architecture of the novel MPGD-based photon detectors of COMPASS RICH-1 consists in a large-size hybrid MPGD multilayer layout combining two layers of Thick-GEMs and a bulk resistive MICROMEGAS. Concerning biasing voltage, the Thick-GEMs are segmented in order to reduce the energy released in case of occasional discharges, while the MICROMEGAS anode is segmented in pads individually biased at… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.01667v1-abstract-full').style.display = 'inline'; document.getElementById('1803.01667v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1803.01667v1-abstract-full" style="display: none;"> The architecture of the novel MPGD-based photon detectors of COMPASS RICH-1 consists in a large-size hybrid MPGD multilayer layout combining two layers of Thick-GEMs and a bulk resistive MICROMEGAS. Concerning biasing voltage, the Thick-GEMs are segmented in order to reduce the energy released in case of occasional discharges, while the MICROMEGAS anode is segmented in pads individually biased at positive voltage, while the micromesh is grounded. In total, there are ten different electrode types and more than 20000 electrodes supplied by more than 100 HV channels. Commercial power supply units are used. The original elements of the power supply system are the architecture of the voltage distribution net, the compensation, by voltage adjustment, of the effects of pressure and temperature variation affecting the detector gain and a sophisticated control software, which allows to protect the detectors against errors by the operator, to monitor and log voltages and current at 1 Hz rate and to automatically react to detector misbehaviors. The HV system and its performance are described in detail as well as the electrical stability of the detector during the operation at COMPASS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.01667v1-abstract-full').style.display = 'none'; document.getElementById('1803.01667v1-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 March, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2018. </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">5th international conference on Micro-Pattern Gas Detectors (MPGD2017),presentation by Silvia Dalla Torre</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.02739">arXiv:1802.02739</a> <span> [<a href="https://arxiv.org/pdf/1802.02739">pdf</a>, <a href="https://arxiv.org/format/1802.02739">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2019.04.038">10.1016/j.physletb.2019.04.038 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/nucl-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a> , et al. (202 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="1802.02739v2-abstract-short" style="display: inline;"> We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $渭^+$ and $渭^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured $渭^+$ and $渭^-$ cross sections for deeply virtual Compton scattering on the squared four-momentum transfer $t$ from the initial to the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.02739v2-abstract-full').style.display = 'inline'; document.getElementById('1802.02739v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.02739v2-abstract-full" style="display: none;"> We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $渭^+$ and $渭^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured $渭^+$ and $渭^-$ cross sections for deeply virtual Compton scattering on the squared four-momentum transfer $t$ from the initial to the final final proton. The slope $B$ of the $t$-dependence is fitted with a single exponential function, which yields $B=(4.3 \ \pm \ 0.6_{\text{stat}}\_{- \ 0.3}^{+ \ 0.1}\big\rvert_{\text{sys}}) (\text{GeV}/c)^{-2}$. This result can be converted into an average transverse extension of partons in the proton, $\sqrt{\langle r_{\perp}^2 \rangle} = (0.58 \ \pm \ 0.04_{\text{stat}}\_{- \ 0.02}^{+ \ 0.01}\big\rvert_{\text{sys}})\text{fm}$. For this measurement, the average virtuality of the photon mediating the interaction is $\langle Q^2 \rangle = 1.8\,(\text{GeV/}c)^2$ and the average value of the Bjorken variable is $\langle x_{\text{Bj}} \rangle = 0.056$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.02739v2-abstract-full').style.display = 'none'; document.getElementById('1802.02739v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </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">13 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2018-016 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.09274">arXiv:1710.09274</a> <span> [<a href="https://arxiv.org/pdf/1710.09274">pdf</a>, <a href="https://arxiv.org/format/1710.09274">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1051/epjconf/201817401004">10.1051/epjconf/201817401004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Status of COMPASS RICH-1 Upgrade with MPGD-based Photon Detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M">M. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Chiosso%2C+M">M. Chiosso</a>, <a href="/search/nucl-ex?searchtype=author&query=Ciliberti%2C+P">P. Ciliberti</a>, <a href="/search/nucl-ex?searchtype=author&query=Torre%2C+S+D">S. Dalla Torre</a>, <a href="/search/nucl-ex?searchtype=author&query=Dasgupta%2C+S">S. Dasgupta</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisov%2C+O">O. Denisov</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger</a>, <a href="/search/nucl-ex?searchtype=author&query=Finger%2C+M">M. Finger Jr</a>, <a href="/search/nucl-ex?searchtype=author&query=Fishcher%2C+H">H. Fishcher</a>, <a href="/search/nucl-ex?searchtype=author&query=Gobbo%2C+B">B. Gobbo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gregori%2C+M">M. Gregori</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamar%2C+G">G. Hamar</a>, <a href="/search/nucl-ex?searchtype=author&query=Herrmann%2C+F">F. Herrmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Koenigsmann%2C+K">K. Koenigsmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Levorato%2C+S">S. Levorato</a>, <a href="/search/nucl-ex?searchtype=author&query=Maggiora%2C+A">A. Maggiora</a>, <a href="/search/nucl-ex?searchtype=author&query=Makke%2C+N">N. Makke</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+A">A. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Menon%2C+G">G. Menon</a>, <a href="/search/nucl-ex?searchtype=author&query=Novy%2C+J">J. Novy</a>, <a href="/search/nucl-ex?searchtype=author&query=Panzieri%2C+D">D. Panzieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Pereira%2C+F+A">F. A. Pereira</a> , et al. (10 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="1710.09274v1-abstract-short" style="display: inline;"> A Set of new MPGD-based Photon Detectors is being built for the upgrade of COMPASS RICH-1. The detectors cover a total active area of 1.4 m$^2$ and are based on a hybrid architecture consisting of two THGEM layers and a Micromegas. A CsI film on one THGEM acts as a reflective photocathode. The characteristics of the detector, the production of the components and their validation tests are describe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.09274v1-abstract-full').style.display = 'inline'; document.getElementById('1710.09274v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.09274v1-abstract-full" style="display: none;"> A Set of new MPGD-based Photon Detectors is being built for the upgrade of COMPASS RICH-1. The detectors cover a total active area of 1.4 m$^2$ and are based on a hybrid architecture consisting of two THGEM layers and a Micromegas. A CsI film on one THGEM acts as a reflective photocathode. The characteristics of the detector, the production of the components and their validation tests are described in detail. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.09274v1-abstract-full').style.display = 'none'; document.getElementById('1710.09274v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">MPGD 2015 Proceedings</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.07374">arXiv:1709.07374</a> <span> [<a href="https://arxiv.org/pdf/1709.07374">pdf</a>, <a href="https://arxiv.org/format/1709.07374">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.97.032006">10.1103/PhysRevD.97.032006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Antoshkin%2C+A">A. Antoshkin</a>, <a href="/search/nucl-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/nucl-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a> , et al. (206 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="1709.07374v1-abstract-short" style="display: inline;"> A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality $Q^{2}>1$ (GeV/$c$)$^2$, invariant mass of the hadronic system $W > 5$ GeV/$c^2$, Bjorken scaling variable in the range… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.07374v1-abstract-full').style.display = 'inline'; document.getElementById('1709.07374v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.07374v1-abstract-full" style="display: none;"> A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality $Q^{2}>1$ (GeV/$c$)$^2$, invariant mass of the hadronic system $W > 5$ GeV/$c^2$, Bjorken scaling variable in the range $0.003 < x < 0.4$, fraction of the virtual photon energy carried by the hadron in the range $0.2 < z < 0.8$, square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 (GeV/$c)^2 < P_{\rm{hT}}^{2} < 3$ (GeV/$c$)$^2$. The multiplicities are presented as a function of $P_{\rm{hT}}^{2}$ in three-dimensional bins of $x$, $Q^2$, $z$ and compared to previous semi-inclusive measurements. We explore the small-$P_{\rm{hT}}^{2}$ region, i.e. $P_{\rm{hT}}^{2} < 1$ (GeV/$c$)$^2$, where hadron transverse momenta are expected to arise from non-perturbative effects, and also the domain of larger $P_{\rm{hT}}^{2}$, where contributions from higher-order perturbative QCD are expected to dominate. The multiplicities are fitted using a single-exponential function at small $P_{\rm{hT}}^{2}$ to study the dependence of the average transverse momentum $\langle P_{\rm{hT}}^{2}\rangle$ on $x$, $Q^2$ and $z$. The power-law behaviour of the multiplicities at large $P_{\rm{hT}}^{2}$ is investigated using various functional forms. The fits describe the data reasonably well over the full measured range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.07374v1-abstract-full').style.display = 'none'; document.getElementById('1709.07374v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">28 pages, 20 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2017-253 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 97, 032006 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.02149">arXiv:1610.02149</a> <span> [<a href="https://arxiv.org/pdf/1610.02149">pdf</a>, <a href="https://arxiv.org/format/1610.02149">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.95.032003">10.1103/PhysRevD.95.032003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Feasibility study for the measurement of $蟺N$ TDAs at PANDA in $\bar{p}p\to J/蠄蟺^0$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=PANDA+Collaboration"> PANDA Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Singh%2C+B">B. Singh</a>, <a href="/search/nucl-ex?searchtype=author&query=Erni%2C+W">W. Erni</a>, <a href="/search/nucl-ex?searchtype=author&query=Krusche%2C+B">B. Krusche</a>, <a href="/search/nucl-ex?searchtype=author&query=Steinacher%2C+M">M. Steinacher</a>, <a href="/search/nucl-ex?searchtype=author&query=Walford%2C+N">N. Walford</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+H">H. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+Z">Z. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+B">B. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Shen%2C+X">X. Shen</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+C">C. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+J">J. Zhao</a>, <a href="/search/nucl-ex?searchtype=author&query=Albrecht%2C+M">M. Albrecht</a>, <a href="/search/nucl-ex?searchtype=author&query=Erlen%2C+T">T. Erlen</a>, <a href="/search/nucl-ex?searchtype=author&query=Fink%2C+M">M. Fink</a>, <a href="/search/nucl-ex?searchtype=author&query=Heinsius%2C+F+H">F. H. Heinsius</a>, <a href="/search/nucl-ex?searchtype=author&query=Held%2C+T">T. Held</a>, <a href="/search/nucl-ex?searchtype=author&query=Holtmann%2C+T">T. Holtmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Jasper%2C+S">S. Jasper</a>, <a href="/search/nucl-ex?searchtype=author&query=Keshk%2C+I">I. Keshk</a>, <a href="/search/nucl-ex?searchtype=author&query=Koch%2C+H">H. Koch</a>, <a href="/search/nucl-ex?searchtype=author&query=Kopf%2C+B">B. Kopf</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhlmann%2C+M">M. Kuhlmann</a>, <a href="/search/nucl-ex?searchtype=author&query=K%C3%BCmmel%2C+M">M. K眉mmel</a>, <a href="/search/nucl-ex?searchtype=author&query=Leiber%2C+S">S. Leiber</a> , et al. (488 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1610.02149v1-abstract-short" style="display: inline;"> The exclusive charmonium production process in $\bar{p}p$ annihilation with an associated $蟺^0$ meson $\bar{p}p\to J/蠄蟺^0$ is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the $J/蠄\to e^+e^-$ decay channel with the PANDA (AntiProton ANnihilation at DArmstadt) experiment is investigated. Simulations on signal reconstruction efficiency as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02149v1-abstract-full').style.display = 'inline'; document.getElementById('1610.02149v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.02149v1-abstract-full" style="display: none;"> The exclusive charmonium production process in $\bar{p}p$ annihilation with an associated $蟺^0$ meson $\bar{p}p\to J/蠄蟺^0$ is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the $J/蠄\to e^+e^-$ decay channel with the PANDA (AntiProton ANnihilation at DArmstadt) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the $\bar{p}p\to蟺^+蟺^-蟺^0$ and $\bar{p}p\to J/蠄蟺^0蟺^0$ reactions are performed with PandaRoot, the simulation and analysis software framework of the PANDA experiment. It is shown that the measurement can be done at PANDA with significant constraining power under the assumption of an integrated luminosity attainable in four to five months of data taking at the maximum design luminosity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02149v1-abstract-full').style.display = 'none'; document.getElementById('1610.02149v1-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">25 pages, 22 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 95, 032003 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.06760">arXiv:1608.06760</a> <span> [<a href="https://arxiv.org/pdf/1608.06760">pdf</a>, <a href="https://arxiv.org/format/1608.06760">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2017.01.053">10.1016/j.physletb.2017.01.053 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Augsten%2C+K">K. Augsten</a>, <a href="/search/nucl-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Ball%2C+M">M. Ball</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a> , et al. (202 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="1608.06760v1-abstract-short" style="display: inline;"> Precise measurements of charged-kaon multiplicities in deep inelastic scattering were performed. The results are presented in three-dimensional bins of the Bjorken scaling variable x, the relative virtual-photon energy y, and the fraction z of the virtual-photon energy carried by the produced hadron. The data were obtained by the COMPASS Collaboration by scattering 160 GeV muons off an isoscalar 6… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.06760v1-abstract-full').style.display = 'inline'; document.getElementById('1608.06760v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.06760v1-abstract-full" style="display: none;"> Precise measurements of charged-kaon multiplicities in deep inelastic scattering were performed. The results are presented in three-dimensional bins of the Bjorken scaling variable x, the relative virtual-photon energy y, and the fraction z of the virtual-photon energy carried by the produced hadron. The data were obtained by the COMPASS Collaboration by scattering 160 GeV muons off an isoscalar 6 LiD target. They cover the kinematic domain 1 (GeV/c)2 < Q2 < 60 (GeV/c)^2 in the photon virtuality, 0.004 < x < 0.4, 0.1 < y < 0.7, 0.20 < z < 0.85, and W > 5 GeV/c^2 in the invariant mass of the hadronic system. The results from the sum of the z-integrated K+ and K- multiplicities at high x point to a value of the non-strange quark fragmentation function larger than obtained by the earlier DSS fit. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.06760v1-abstract-full').style.display = 'none'; document.getElementById('1608.06760v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">10 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2016--206 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1606.03725">arXiv:1606.03725</a> <span> [<a href="https://arxiv.org/pdf/1606.03725">pdf</a>, <a href="https://arxiv.org/format/1606.03725">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div 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.nuclphysb.2016.12.015">10.1016/j.nuclphysb.2016.12.015 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exclusive $蠅$ meson muoproduction on transversely polarised protons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bisplinghoff%2C+J">J. Bisplinghoff</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Boer%2C+M">M. Boer</a> , et al. (204 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="1606.03725v2-abstract-short" style="display: inline;"> Exclusive production of $蠅$ mesons was studied at the COMPASS experiment by scattering $160~\mathrm{GeV}/\mathit{c}$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured in the range of photon virtuality $1~(\mathrm{GeV}/\mathit{c})^2 < Q^2 < 10~(\mathrm{GeV}/\mathit{c})^2$, Bjorken scaling variable $0.003 < x_{\mathit{Bj}} < 0.3$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.03725v2-abstract-full').style.display = 'inline'; document.getElementById('1606.03725v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1606.03725v2-abstract-full" style="display: none;"> Exclusive production of $蠅$ mesons was studied at the COMPASS experiment by scattering $160~\mathrm{GeV}/\mathit{c}$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured in the range of photon virtuality $1~(\mathrm{GeV}/\mathit{c})^2 < Q^2 < 10~(\mathrm{GeV}/\mathit{c})^2$, Bjorken scaling variable $0.003 < x_{\mathit{Bj}} < 0.3$ and transverse momentum squared of the $蠅$ meson $0.05~(\mathrm{GeV}/\mathit{c})^2 < p_{T}^{2} < 0.5~(\mathrm{GeV}/\mathit{c})^2$. The measured asymmetries are sensitive to the nucleon helicity-flip Generalised Parton Distributions (GPD) $E$ that are related to the orbital angular momentum of quarks, the chiral-odd GPDs $H_{T}$ that are related to the transversity Parton Distribution Functions, and the sign of the $蟺蠅$ transition form factor. The results are compared to recent calculations of a GPD-based model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.03725v2-abstract-full').style.display = 'none'; document.getElementById('1606.03725v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 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">23 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2016-157 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1606.01118">arXiv:1606.01118</a> <span> [<a href="https://arxiv.org/pdf/1606.01118">pdf</a>, <a href="https://arxiv.org/ps/1606.01118">ps</a>, <a href="https://arxiv.org/format/1606.01118">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Feasibility studies of time-like proton electromagnetic form factors at PANDA at FAIR </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=PANDA+Collaboration"> PANDA Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Singh%2C+B">B. Singh</a>, <a href="/search/nucl-ex?searchtype=author&query=Erni%2C+W">W. Erni</a>, <a href="/search/nucl-ex?searchtype=author&query=Krusche%2C+B">B. Krusche</a>, <a href="/search/nucl-ex?searchtype=author&query=Steinacher%2C+M">M. Steinacher</a>, <a href="/search/nucl-ex?searchtype=author&query=Walford%2C+N">N. Walford</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+B">B. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+H">H. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+Z">Z. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Shen%2C+X">X. Shen</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+C">C. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+J">J. Zhao</a>, <a href="/search/nucl-ex?searchtype=author&query=Albrecht%2C+M">M. Albrecht</a>, <a href="/search/nucl-ex?searchtype=author&query=Erlen%2C+T">T. Erlen</a>, <a href="/search/nucl-ex?searchtype=author&query=Fink%2C+M">M. Fink</a>, <a href="/search/nucl-ex?searchtype=author&query=Heinsius%2C+F">F. Heinsius</a>, <a href="/search/nucl-ex?searchtype=author&query=Held%2C+T">T. Held</a>, <a href="/search/nucl-ex?searchtype=author&query=Holtmann%2C+T">T. Holtmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Jasper%2C+S">S. Jasper</a>, <a href="/search/nucl-ex?searchtype=author&query=Keshk%2C+I">I. Keshk</a>, <a href="/search/nucl-ex?searchtype=author&query=Koch%2C+H">H. Koch</a>, <a href="/search/nucl-ex?searchtype=author&query=Kopf%2C+B">B. Kopf</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhlmann%2C+M">M. Kuhlmann</a>, <a href="/search/nucl-ex?searchtype=author&query=K%C3%BCmmel%2C+M">M. K眉mmel</a>, <a href="/search/nucl-ex?searchtype=author&query=Leiber%2C+S">S. Leiber</a> , et al. (482 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="1606.01118v2-abstract-short" style="display: inline;"> Simulation results for future measurements of electromagnetic proton form factors at \PANDA (FAIR) within the PandaRoot software framework are reported. The statistical precision with which the proton form factors can be determined is estimated. The signal channel $\bar p p \to e^+ e^-$ is studied on the basis of two different but consistent procedures. The suppression of the main background chann… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.01118v2-abstract-full').style.display = 'inline'; document.getElementById('1606.01118v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1606.01118v2-abstract-full" style="display: none;"> Simulation results for future measurements of electromagnetic proton form factors at \PANDA (FAIR) within the PandaRoot software framework are reported. The statistical precision with which the proton form factors can be determined is estimated. The signal channel $\bar p p \to e^+ e^-$ is studied on the basis of two different but consistent procedures. The suppression of the main background channel, $\textit{i.e.}$ $\bar p p \to 蟺^+ 蟺^-$, is studied. Furthermore, the background versus signal efficiency, statistical and systematical uncertainties on the extracted proton form factors are evaluated using two different procedures. The results are consistent with those of a previous simulation study using an older, simplified framework. However, a slightly better precision is achieved in the PandaRoot study in a large range of momentum transfer, assuming the nominal beam conditions and detector performance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.01118v2-abstract-full').style.display = 'none'; document.getElementById('1606.01118v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1604.02695">arXiv:1604.02695</a> <span> [<a href="https://arxiv.org/pdf/1604.02695">pdf</a>, <a href="https://arxiv.org/format/1604.02695">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2016.09.042">10.1016/j.physletb.2016.09.042 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multiplicities of charged pions and unidentified charged hadrons from deep-inelastic scattering of muons off an isoscalar target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Agarwala%2C+J">J. Agarwala</a>, <a href="/search/nucl-ex?searchtype=author&query=Aghasyan%2C+M">M. Aghasyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anfimov%2C+N+V">N. V. Anfimov</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Augustyniak%2C+W">W. Augustyniak</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bisplinghoff%2C+J">J. Bisplinghoff</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Boer%2C+M">M. Boer</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="1604.02695v2-abstract-short" style="display: inline;"> Multiplicities of charged pions and unidentified hadrons produced in deep-inelastic scattering were measured in bins of the Bjorken scaling variable $x$, the relative virtual-photon energy $y$ and the relative hadron energy $z$. Data were obtained by the COMPASS Collaboration using a 160 GeV muon beam and an isoscalar target ($^6$LiD). They cover the kinematic domain in the photon virtuality… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.02695v2-abstract-full').style.display = 'inline'; document.getElementById('1604.02695v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1604.02695v2-abstract-full" style="display: none;"> Multiplicities of charged pions and unidentified hadrons produced in deep-inelastic scattering were measured in bins of the Bjorken scaling variable $x$, the relative virtual-photon energy $y$ and the relative hadron energy $z$. Data were obtained by the COMPASS Collaboration using a 160 GeV muon beam and an isoscalar target ($^6$LiD). They cover the kinematic domain in the photon virtuality $Q^2$ > 1(GeV/c$)^2$, $0.004 < x < 0.4$, $0.2 < z < 0.85$ and $0.1 < y < 0.7$. In addition, a leading-order pQCD analysis was performed using the pion multiplicity results to extract quark fragmentation functions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.02695v2-abstract-full').style.display = 'none'; document.getElementById('1604.02695v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2016-095 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1409.0865">arXiv:1409.0865</a> <span> [<a href="https://arxiv.org/pdf/1409.0865">pdf</a>, <a href="https://arxiv.org/ps/1409.0865">ps</a>, <a href="https://arxiv.org/format/1409.0865">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="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Experimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=PANDA+Collaboration"> PANDA Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Singh%2C+B+P">B. P. Singh</a>, <a href="/search/nucl-ex?searchtype=author&query=Erni%2C+W">W. Erni</a>, <a href="/search/nucl-ex?searchtype=author&query=Keshelashvili%2C+I">I. Keshelashvili</a>, <a href="/search/nucl-ex?searchtype=author&query=Krusche%2C+B">B. Krusche</a>, <a href="/search/nucl-ex?searchtype=author&query=%25%2C+M+S">M. Steinacher %</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+B">B. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+H">H. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+Z">Z. Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Shen%2C+X">X. Shen</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+C">C. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=%25%2C+J+Z">J. Zhao %</a>, <a href="/search/nucl-ex?searchtype=author&query=Albrecht%2C+M">M. Albrecht</a>, <a href="/search/nucl-ex?searchtype=author&query=Fink%2C+M">M. Fink</a>, <a href="/search/nucl-ex?searchtype=author&query=Heinsius%2C+F+H">F. H. Heinsius</a>, <a href="/search/nucl-ex?searchtype=author&query=Held%2C+T">T. Held</a>, <a href="/search/nucl-ex?searchtype=author&query=Holtmann%2C+T">T. Holtmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Koch%2C+H">H. Koch</a>, <a href="/search/nucl-ex?searchtype=author&query=Kopf%2C+B">B. Kopf</a>, <a href="/search/nucl-ex?searchtype=author&query=K%C3%BCmmel%2C+M">M. K眉mmel</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhl%2C+G">G. Kuhl</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhlmann%2C+M">M. Kuhlmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Leyhe%2C+M">M. Leyhe</a>, <a href="/search/nucl-ex?searchtype=author&query=Mikirtychyants%2C+M">M. Mikirtychyants</a>, <a href="/search/nucl-ex?searchtype=author&query=Musiol%2C+P">P. Musiol</a> , et al. (511 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="1409.0865v2-abstract-short" style="display: inline;"> Baryon-to-meson Transition Distribution Amplitudes (TDAs) encoding valuable new information on hadron structure appear as building blocks in the collinear factorized description for several types of hard exclusive reactions. In this paper, we address the possibility of accessing nucleon-to-pion ($蟺N$) TDAs from $\bar{p}p \to e^+e^- 蟺^0$ reaction with the future PANDA detector at the FAIR facility.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.0865v2-abstract-full').style.display = 'inline'; document.getElementById('1409.0865v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1409.0865v2-abstract-full" style="display: none;"> Baryon-to-meson Transition Distribution Amplitudes (TDAs) encoding valuable new information on hadron structure appear as building blocks in the collinear factorized description for several types of hard exclusive reactions. In this paper, we address the possibility of accessing nucleon-to-pion ($蟺N$) TDAs from $\bar{p}p \to e^+e^- 蟺^0$ reaction with the future PANDA detector at the FAIR facility. At high center of mass energy and high invariant mass squared of the lepton pair $q^2$, the amplitude of the signal channel $\bar{p}p \to e^+e^- 蟺^0$ admits a QCD factorized description in terms of $蟺N$ TDAs and nucleon Distribution Amplitudes (DAs) in the forward and backward kinematic regimes. Assuming the validity of this factorized description, we perform feasibility studies for measuring $\bar{p}p \to e^+e^- 蟺^0$ with the PANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. $\bar{p}p \to 蟺^+蟺^- 蟺^0$ were performed for the center of mass energy squared $s = 5$ GeV$^2$ and $s = 10$ GeV$^2$, in the kinematic regions $3.0 < q^2 < 4.3$ GeV$^2$ and $5 < q^2 < 9$ GeV$^2$, respectively, with a neutral pion scattered in the forward or backward cone $| \cos胃_{蟺^0}| > 0.5 $ in the proton-antiproton center of mass frame. Results of the simulation show that the particle identification capabilities of the PANDA detector will allow to achieve a background rejection factor of $5\cdot 10^7$ ($1\cdot 10^7$) at low (high) $q^2$ for $s=5$ GeV$^2$, and of $1\cdot 10^8$ ($6\cdot 10^6$) at low (high) $q^2$ for $s=10$ GeV$^2$, while keeping the signal reconstruction efficiency at around $40\%$. At both energies, a clean lepton signal can be reconstructed with the expected statistics corresponding to $2$ fb$^{-1}$ of integrated luminosity. (.../...) <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.0865v2-abstract-full').style.display = 'none'; document.getElementById('1409.0865v2-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 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 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">19 pages, 7 figures (some multiple), 2 tables (each double), preprint of an article for epj - v2</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1408.4286">arXiv:1408.4286</a> <span> [<a href="https://arxiv.org/pdf/1408.4286">pdf</a>, <a href="https://arxiv.org/format/1408.4286">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2014.11.058">10.1016/j.physletb.2014.11.058 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Odd and Even Partial Waves of $畏蟺^-$ and $畏'蟺^-$ in $蟺^-p\to畏^{(\prime)}蟺^-p$ at $191\,\textrm{GeV}/c$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Baum%2C+G">G. Baum</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Berlin%2C+A">A. Berlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielert%2C+E+R">E. R. Bielert</a>, <a href="/search/nucl-ex?searchtype=author&query=Bieling%2C+J">J. Bieling</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bisplinghoff%2C+J">J. Bisplinghoff</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a> , et al. (184 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="1408.4286v1-abstract-short" style="display: inline;"> Exclusive production of $畏蟺^-$ and $畏'蟺^-$ has been studied with a $191\,\textrm{GeV}/c$ $蟺^-$ beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ($L$) characteristics in the inspected invariant mass range up to $3\,\textrm{GeV}/c^2$. A striking similarity between the two systems is observed for the $L=2,4,6$ intensities (scaled… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1408.4286v1-abstract-full').style.display = 'inline'; document.getElementById('1408.4286v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1408.4286v1-abstract-full" style="display: none;"> Exclusive production of $畏蟺^-$ and $畏'蟺^-$ has been studied with a $191\,\textrm{GeV}/c$ $蟺^-$ beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ($L$) characteristics in the inspected invariant mass range up to $3\,\textrm{GeV}/c^2$. A striking similarity between the two systems is observed for the $L=2,4,6$ intensities (scaled by kinematical factors) and the relative phases. The known resonances $a_2(1320)$ and $a_4(2040)$ are in line with this similarity. In contrast, a strong enhancement of $畏'蟺^-$ over $畏蟺^-$ is found for the $L=1,3,5$ waves, which carry non-$q\bar q$ quantum numbers. The $L=1$ intensity peaks at $1.7\,\textrm{GeV}/c^2$ in $畏'蟺^-$ and at $1.4\,\textrm{GeV}/c^2$ in $畏蟺^-$, the corresponding phase motions with respect to $L=2$ are different. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1408.4286v1-abstract-full').style.display = 'none'; document.getElementById('1408.4286v1-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 August, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">16 pages, 5 figures and 1 table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.6377">arXiv:1405.6377</a> <span> [<a href="https://arxiv.org/pdf/1405.6377">pdf</a>, <a href="https://arxiv.org/format/1405.6377">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div 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.114.062002">10.1103/PhysRevLett.114.062002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the charged-pion polarisability </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Baum%2C+G">G. Baum</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Berlin%2C+A">A. Berlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bieling%2C+J">J. Bieling</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bisplinghoff%2C+J">J. Bisplinghoff</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Braun%2C+C">C. Braun</a> , et al. (188 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1405.6377v2-abstract-short" style="display: inline;"> The COMPASS collaboration at CERN has investigated pion Compton scattering, $蟺^-纬\rightarrow 蟺^-纬$, at centre-of-mass energy below 3.5 pion masses. The process is embedded in the reaction $蟺^-\mathrm{Ni}\rightarrow蟺^-纬\;\mathrm{Ni}$, which is initiated by 190\,GeV pions impinging on a nickel target. The exchange of quasi-real photons is selected by isolating the sharp Coulomb peak observed at smal… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.6377v2-abstract-full').style.display = 'inline'; document.getElementById('1405.6377v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.6377v2-abstract-full" style="display: none;"> The COMPASS collaboration at CERN has investigated pion Compton scattering, $蟺^-纬\rightarrow 蟺^-纬$, at centre-of-mass energy below 3.5 pion masses. The process is embedded in the reaction $蟺^-\mathrm{Ni}\rightarrow蟺^-纬\;\mathrm{Ni}$, which is initiated by 190\,GeV pions impinging on a nickel target. The exchange of quasi-real photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, $Q^2<0.0015$\,(GeV/$c$)$^2$. From a sample of 63\,000 events the pion electric polarisability is determined to be $伪_蟺 =\ (\,2.0\ \pm\ 0.6_{\mbox{\scriptsize stat}}\ \pm\ 0.7_{\mbox{\scriptsize syst}}\,) \times 10^{-4}\,\mbox{fm}^3$ under the assumption $伪_蟺=-尾_蟺$, which relates the electric and magnetic dipole polarisabilities. It is the most precise measurement of this fundamental low-energy parameter of strong interaction, that has been addressed since long by various methods with conflicting outcomes. While this result is in tension with previous dedicated measurements, it is found in agreement with the expectation from chiral perturbation theory. An additional measurement replacing pions by muons, for which the cross-section behavior is unambigiously known, was performed for an independent estimate of the systematic uncertainty. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.6377v2-abstract-full').style.display = 'none'; document.getElementById('1405.6377v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 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">Published version: 9 pages, 3 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 114, 062002 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.6376">arXiv:1405.6376</a> <span> [<a href="https://arxiv.org/pdf/1405.6376">pdf</a>, <a href="https://arxiv.org/format/1405.6376">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div 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.nuclphysb.2014.07.020">10.1016/j.nuclphysb.2014.07.020 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin alignment and violation of the OZI rule in exclusive $蠅$ and $蠁$ production in pp collisions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Akhunzyanov%2C+R">R. Akhunzyanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+M+G">M. G. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Anosov%2C+V">V. Anosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Baum%2C+G">G. Baum</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+R">R. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Berlin%2C+A">A. Berlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bieling%2C+J">J. Bieling</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bisplinghoff%2C+J">J. Bisplinghoff</a>, <a href="/search/nucl-ex?searchtype=author&query=Bodlak%2C+M">M. Bodlak</a>, <a href="/search/nucl-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Braun%2C+C">C. Braun</a> , et al. (184 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1405.6376v1-abstract-short" style="display: inline;"> Exclusive production of the isoscalar vector mesons $蠅$ and $蠁$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on $x_{F}$ and on the invariant mass… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.6376v1-abstract-full').style.display = 'inline'; document.getElementById('1405.6376v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.6376v1-abstract-full" style="display: none;"> Exclusive production of the isoscalar vector mesons $蠅$ and $蠁$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on $x_{F}$ and on the invariant mass $M_{p\mathrm{V}}$ of the system formed by fast proton $p_\mathrm{fast}$ and vector meson $V$ is discussed in terms of diffractive production of $p_\mathrm{fast}V$ resonances in competition with central production. The measurement of the spin density matrix element $蟻_{00}$ of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on $x_{F}$ and on $M_{p\mathrm{V}}$ are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to $蠅$ production which are absent in the case of the $蠁$ meson. Removing the low-mass $M_{p\mathrm{V}}$ resonant region, the OZI rule is found to be violated by a factor of eight, independently of $x_\mathrm{F}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.6376v1-abstract-full').style.display = 'none'; document.getElementById('1405.6376v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 May, 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">23 pages, 13 figures and 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/1310.1454">arXiv:1310.1454</a> <span> [<a href="https://arxiv.org/pdf/1310.1454">pdf</a>, <a href="https://arxiv.org/format/1310.1454">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2014.02.005">10.1016/j.physletb.2014.02.005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse target spin asymmetries in exclusive $蟻^0$ muoproduction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+M+G">M. G. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexakhin%2C+V+Y">V. Yu. Alexakhin</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexandrov%2C+Y">Yu. Alexandrov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieux%2C+V">V. Andrieux</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badellek%2C+B">B. Badellek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Baum%2C+G">G. Baum</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Berlin%2C+A">A. Berlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertini%2C+R">R. Bertini</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bieling%2C+J">J. Bieling</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bisplinghoff%2C+J">J. Bisplinghoff</a>, <a href="/search/nucl-ex?searchtype=author&query=Boer%2C+M">M. Boer</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Braun%2C+C">C. Braun</a>, <a href="/search/nucl-ex?searchtype=author&query=Bravar%2C+A">A. Bravar</a> , et al. (188 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1310.1454v2-abstract-short" style="display: inline;"> Exclusive production of $蟻^0$ mesons was studied at the COMPASS experiment by scattering 160 GeV/$c$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured as a function of $Q^2$, $x_{Bj}$, or $p_{T}^{2}$. The $\sin 蠁_S$ asymmetry is found to be $-0.019 \pm 0.008(stat.) \pm 0.003(syst.)$. All other asymmetries are also found to be of sm… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.1454v2-abstract-full').style.display = 'inline'; document.getElementById('1310.1454v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1310.1454v2-abstract-full" style="display: none;"> Exclusive production of $蟻^0$ mesons was studied at the COMPASS experiment by scattering 160 GeV/$c$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured as a function of $Q^2$, $x_{Bj}$, or $p_{T}^{2}$. The $\sin 蠁_S$ asymmetry is found to be $-0.019 \pm 0.008(stat.) \pm 0.003(syst.)$. All other asymmetries are also found to be of small magnitude and consistent with zero within experimental uncertainties. Very recent calculations using a GPD-based model agree well with the present results. The data is interpreted as evidence for the existence of chiral-odd, transverse generalized parton distributions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1310.1454v2-abstract-full').style.display = 'none'; document.getElementById('1310.1454v2-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, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">14 pages, two tables, 5 figures, bibliography updated</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1304.0952">arXiv:1304.0952</a> <span> [<a href="https://arxiv.org/pdf/1304.0952">pdf</a>, <a href="https://arxiv.org/format/1304.0952">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-013-2581-9">10.1140/epjc/s10052-013-2581-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of 危(1385) and 螢(1321) hyperon and antihyperon production in deep inelastic muon scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adolph%2C+C">C. Adolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Alekseev%2C+M">M. Alekseev</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexakhin%2C+V+Y">V. Yu. Alexakhin</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexandrov%2C+Y">Yu. Alexandrov</a>, <a href="/search/nucl-ex?searchtype=author&query=Alexeev%2C+G+D">G. D. Alexeev</a>, <a href="/search/nucl-ex?searchtype=author&query=Amoroso%2C+A">A. Amoroso</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Badelek%2C+B">B. Badelek</a>, <a href="/search/nucl-ex?searchtype=author&query=Balestra%2C+F">F. Balestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Barth%2C+J">J. Barth</a>, <a href="/search/nucl-ex?searchtype=author&query=Baum%2C+G">G. Baum</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedfer%2C+Y">Y. Bedfer</a>, <a href="/search/nucl-ex?searchtype=author&query=Berlin%2C+A">A. Berlin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bernhard%2C+J">J. Bernhard</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertini%2C+R">R. Bertini</a>, <a href="/search/nucl-ex?searchtype=author&query=Bicker%2C+K">K. Bicker</a>, <a href="/search/nucl-ex?searchtype=author&query=Bieling%2C+J">J. Bieling</a>, <a href="/search/nucl-ex?searchtype=author&query=Birsa%2C+R">R. Birsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bisplinghoff%2C+J">J. Bisplinghoff</a>, <a href="/search/nucl-ex?searchtype=author&query=Bordalo%2C+P">P. Bordalo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradamante%2C+F">F. Bradamante</a>, <a href="/search/nucl-ex?searchtype=author&query=Braun%2C+C">C. Braun</a>, <a href="/search/nucl-ex?searchtype=author&query=Bravar%2C+A">A. Bravar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bressan%2C+A">A. Bressan</a>, <a href="/search/nucl-ex?searchtype=author&query=Buechele%2C+M">M. Buechele</a> , et al. (182 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1304.0952v2-abstract-short" style="display: inline;"> Large samples of 螞, 危(1385) and 螢(1321) hyperons produced in deep-inelastic muon scattering off a ^6LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of 危(1385)^+, 危(1385)^-, \bar危(1385)^-, \bar危(1385)^+, 螢(1321)^-, and \bar螢(1321)^+ hyperons decaying into 螞(\bar螞)蟺were measured. The heavy hyperon to 螞and heavy antihyperon to \bar螞 yield ratios were found t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.0952v2-abstract-full').style.display = 'inline'; document.getElementById('1304.0952v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1304.0952v2-abstract-full" style="display: none;"> Large samples of 螞, 危(1385) and 螢(1321) hyperons produced in deep-inelastic muon scattering off a ^6LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of 危(1385)^+, 危(1385)^-, \bar危(1385)^-, \bar危(1385)^+, 螢(1321)^-, and \bar螢(1321)^+ hyperons decaying into 螞(\bar螞)蟺were measured. The heavy hyperon to 螞and heavy antihyperon to \bar螞 yield ratios were found to be in the range 3.8% to 5.6% with a relative uncertainty of about 10%. They were used to tune the parameters relevant for strange particle production of the LEPTO Monte Carlo generator. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.0952v2-abstract-full').style.display = 'none'; document.getElementById('1304.0952v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 April, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">13 pages, 4 figures and 3 tables, 1 Appendix with 3 figures. Version accepted by the Editor</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 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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