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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.07704">arXiv:2311.07704</a> <span> [<a href="https://arxiv.org/pdf/2311.07704">pdf</a>, <a href="https://arxiv.org/format/2311.07704">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Cosmic-ray searches with the MATHUSLA detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alpigiani%2C+C">Cristiano Alpigiani</a>, <a href="/search/physics?searchtype=author&query=Arteaga-Vel%C3%A1zquez%2C+J+C">J. C. Arteaga-Vel谩zquez</a>, <a href="/search/physics?searchtype=author&query=Blanco-Lira%2C+D">Daniela Blanco-Lira</a>, <a href="/search/physics?searchtype=author&query=Boscherini%2C+D">Davide Boscherini</a>, <a href="/search/physics?searchtype=author&query=Caballero-Mora%2C+K+S">K. S. Caballero-Mora</a>, <a href="/search/physics?searchtype=author&query=Camarri%2C+P">Paolo Camarri</a>, <a href="/search/physics?searchtype=author&query=Cardarelli%2C+R">Roberto Cardarelli</a>, <a href="/search/physics?searchtype=author&query=Ram%C3%ADrez%2C+D+C">Dennis Cazar Ram铆rez</a>, <a href="/search/physics?searchtype=author&query=Di+Sciascio%2C+G">Giuseppe Di Sciascio</a>, <a href="/search/physics?searchtype=author&query=T%C3%A9llez%2C+A+F">Arturo Fern谩ndez T茅llez</a>, <a href="/search/physics?searchtype=author&query=Lubatti%2C+H+J">H. J. Lubatti</a>, <a href="/search/physics?searchtype=author&query=Morales-Olivares%2C+O+G">O. G. Morales-Olivares</a>, <a href="/search/physics?searchtype=author&query=Mamani%2C+P+A+P">Piter Amador Paye Mamani</a>, <a href="/search/physics?searchtype=author&query=Rangel%2C+D+R">David Rivera Rangel</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez-Cahuantzi%2C+M">Mario Rodr铆guez-Cahuantzi</a>, <a href="/search/physics?searchtype=author&query=Santonico%2C+R">Rinaldo Santonico</a>, <a href="/search/physics?searchtype=author&query=V%C3%A1zquez%2C+M+A+S">Martin Alfonso Subieta V谩zquez</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="2311.07704v1-abstract-short" style="display: inline;"> The performance of the proposed MATHUSLA detector as an instrument for studying the physics of cosmic rays by measuring extensive air showers is presented. The MATHUSLA detector is designed to observe and study the decay of long-lived particles produced at the pp interaction point of the CMS detector at CERN during the HL-LHC data-taking period. The proposed MATHUSLA detector will be composed of m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.07704v1-abstract-full').style.display = 'inline'; document.getElementById('2311.07704v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.07704v1-abstract-full" style="display: none;"> The performance of the proposed MATHUSLA detector as an instrument for studying the physics of cosmic rays by measuring extensive air showers is presented. The MATHUSLA detector is designed to observe and study the decay of long-lived particles produced at the pp interaction point of the CMS detector at CERN during the HL-LHC data-taking period. The proposed MATHUSLA detector will be composed of many layers of long scintillating bars that cannot measure more than one hit per bar and correctly report the hit coordinate in case of multiple hits. This study shows that adding a layer of RPC detectors with both analogue and digital readout significantly enhances the capabilities of MATHUSLA to measure the local densities and arrival times of charged particles at the front of air showers. We discuss open issues in cosmic-ray physics that the proposed MATHUSLA detector with an additional layer of RPC detectors could address and conclude by comparing with other air-shower facilities that measure cosmic rays in the PeV energy range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.07704v1-abstract-full').style.display = 'none'; document.getElementById('2311.07704v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">64 pages, 58 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.07789">arXiv:2201.07789</a> <span> [<a href="https://arxiv.org/pdf/2201.07789">pdf</a>, <a href="https://arxiv.org/format/2201.07789">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</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="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjqt/s40507-022-00147-w">10.1140/epjqt/s40507-022-00147-w <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Cold Atoms in Space: Community Workshop Summary and Proposed Road-Map </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alonso%2C+I">Ivan Alonso</a>, <a href="/search/physics?searchtype=author&query=Alpigiani%2C+C">Cristiano Alpigiani</a>, <a href="/search/physics?searchtype=author&query=Altschul%2C+B">Brett Altschul</a>, <a href="/search/physics?searchtype=author&query=Araujo%2C+H">Henrique Araujo</a>, <a href="/search/physics?searchtype=author&query=Arduini%2C+G">Gianluigi Arduini</a>, <a href="/search/physics?searchtype=author&query=Arlt%2C+J">Jan Arlt</a>, <a href="/search/physics?searchtype=author&query=Badurina%2C+L">Leonardo Badurina</a>, <a href="/search/physics?searchtype=author&query=Balaz%2C+A">Antun Balaz</a>, <a href="/search/physics?searchtype=author&query=Bandarupally%2C+S">Satvika Bandarupally</a>, <a href="/search/physics?searchtype=author&query=Barone%2C+B+C+B+M">Barry C Barish Michele Barone</a>, <a href="/search/physics?searchtype=author&query=Barsanti%2C+M">Michele Barsanti</a>, <a href="/search/physics?searchtype=author&query=Bass%2C+S">Steven Bass</a>, <a href="/search/physics?searchtype=author&query=Bassi%2C+A">Angelo Bassi</a>, <a href="/search/physics?searchtype=author&query=Battelier%2C+B">Baptiste Battelier</a>, <a href="/search/physics?searchtype=author&query=Baynham%2C+C+F+A">Charles F. A. Baynham</a>, <a href="/search/physics?searchtype=author&query=Beaufils%2C+Q">Quentin Beaufils</a>, <a href="/search/physics?searchtype=author&query=Belic%2C+A">Aleksandar Belic</a>, <a href="/search/physics?searchtype=author&query=Berge%2C+J">Joel Berge</a>, <a href="/search/physics?searchtype=author&query=Bernabeu%2C+J">Jose Bernabeu</a>, <a href="/search/physics?searchtype=author&query=Bertoldi%2C+A">Andrea Bertoldi</a>, <a href="/search/physics?searchtype=author&query=Bingham%2C+R">Robert Bingham</a>, <a href="/search/physics?searchtype=author&query=Bize%2C+S">Sebastien Bize</a>, <a href="/search/physics?searchtype=author&query=Blas%2C+D">Diego Blas</a>, <a href="/search/physics?searchtype=author&query=Bongs%2C+K">Kai Bongs</a>, <a href="/search/physics?searchtype=author&query=Bouyer%2C+P">Philippe Bouyer</a> , et al. (224 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="2201.07789v1-abstract-short" style="display: inline;"> We summarize the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space. The cold atom technologies discussed include atomic clocks, quantum gravimeters and accelerometers, a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.07789v1-abstract-full').style.display = 'inline'; document.getElementById('2201.07789v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.07789v1-abstract-full" style="display: none;"> We summarize the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space. The cold atom technologies discussed include atomic clocks, quantum gravimeters and accelerometers, and atom interferometers. Prospective applications include metrology, geodesy and measurement of terrestrial mass change due to, e.g., climate change, and fundamental science experiments such as tests of the equivalence principle, searches for dark matter, measurements of gravitational waves and tests of quantum mechanics. We review the current status of cold atom technologies and outline the requirements for their space qualification, including the development paths and the corresponding technical milestones, and identifying possible pathfinder missions to pave the way for missions to exploit the full potential of cold atoms in space. Finally, we present a first draft of a possible road-map for achieving these goals, that we propose for discussion by the interested cold atom, Earth Observation, fundamental physics and other prospective scientific user communities, together with ESA and national space and research funding agencies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.07789v1-abstract-full').style.display = 'none'; document.getElementById('2201.07789v1-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 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Summary of the Community Workshop on Cold Atoms in Space and corresponding Road-map: https://indico.cern.ch/event/1064855/</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> EPJ Quantum Technol. 9, 30 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.01693">arXiv:2009.01693</a> <span> [<a href="https://arxiv.org/pdf/2009.01693">pdf</a>, <a href="https://arxiv.org/format/2009.01693">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> </div> </div> <p class="title is-5 mathjax"> An Update to the Letter of Intent for MATHUSLA: Search for Long-Lived Particles at the HL-LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alpigiani%2C+C">Cristiano Alpigiani</a>, <a href="/search/physics?searchtype=author&query=Arteaga-Vel%C3%A1zquez%2C+J+C">Juan Carlos Arteaga-Vel谩zquez</a>, <a href="/search/physics?searchtype=author&query=Ball%2C+A">Austin Ball</a>, <a href="/search/physics?searchtype=author&query=Barak%2C+L">Liron Barak</a>, <a href="/search/physics?searchtype=author&query=Barron%2C+J">Jared Barron</a>, <a href="/search/physics?searchtype=author&query=Batell%2C+B">Brian Batell</a>, <a href="/search/physics?searchtype=author&query=Beacham%2C+J">James Beacham</a>, <a href="/search/physics?searchtype=author&query=Benhammo%2C+Y">Yan Benhammo</a>, <a href="/search/physics?searchtype=author&query=Caballero-Mora%2C+K+S">Karen Salom茅 Caballero-Mora</a>, <a href="/search/physics?searchtype=author&query=Camarri%2C+P">Paolo Camarri</a>, <a href="/search/physics?searchtype=author&query=Cardarelli%2C+R">Roberto Cardarelli</a>, <a href="/search/physics?searchtype=author&query=Chou%2C+J+P">John Paul Chou</a>, <a href="/search/physics?searchtype=author&query=Cui%2C+W">Wentao Cui</a>, <a href="/search/physics?searchtype=author&query=Curtin%2C+D">David Curtin</a>, <a href="/search/physics?searchtype=author&query=Diamond%2C+M">Miriam Diamond</a>, <a href="/search/physics?searchtype=author&query=Dienes%2C+K+R">Keith R. Dienes</a>, <a href="/search/physics?searchtype=author&query=Dougherty%2C+L+A">Liam Andrew Dougherty</a>, <a href="/search/physics?searchtype=author&query=Di+Sciascio%2C+G">Giuseppe Di Sciascio</a>, <a href="/search/physics?searchtype=author&query=Drewes%2C+M">Marco Drewes</a>, <a href="/search/physics?searchtype=author&query=Etzion%2C+E">Erez Etzion</a>, <a href="/search/physics?searchtype=author&query=Essig%2C+R">Rouven Essig</a>, <a href="/search/physics?searchtype=author&query=Evans%2C+J">Jared Evans</a>, <a href="/search/physics?searchtype=author&query=T%C3%A9llez%2C+A+F">Arturo Fern谩ndez T茅llez</a>, <a href="/search/physics?searchtype=author&query=Fischer%2C+O">Oliver Fischer</a>, <a href="/search/physics?searchtype=author&query=Freeman%2C+J">Jim Freeman</a> , et al. (58 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2009.01693v1-abstract-short" style="display: inline;"> We report on recent progress in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC, updating the information in the original Letter of Intent (LoI), see CDS:LHCC-I-031, arXiv:1811.00927. A suitable site has been identified at LHC Point 5 that is closer to the CMS Interaction Point (IP) than assumed in the LoI. The decay volume has been increased from 20 m to 25 m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.01693v1-abstract-full').style.display = 'inline'; document.getElementById('2009.01693v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.01693v1-abstract-full" style="display: none;"> We report on recent progress in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC, updating the information in the original Letter of Intent (LoI), see CDS:LHCC-I-031, arXiv:1811.00927. A suitable site has been identified at LHC Point 5 that is closer to the CMS Interaction Point (IP) than assumed in the LoI. The decay volume has been increased from 20 m to 25 m in height. Engineering studies have been made in order to locate much of the decay volume below ground, bringing the detector even closer to the IP. With these changes, a 100 m x 100 m detector has the same physics reach for large c$蟿$ as the 200 m x 200 m detector described in the LoI and other studies. The performance for small c$蟿$ is improved because of the proximity to the IP. Detector technology has also evolved while retaining the strip-like sensor geometry in Resistive Plate Chambers (RPC) described in the LoI. The present design uses extruded scintillator bars read out using wavelength shifting fibers and silicon photomultipliers (SiPM). Operations will be simpler and more robust with much lower operating voltages and without the use of greenhouse gases. Manufacturing is straightforward and should result in cost savings. Understanding of backgrounds has also significantly advanced, thanks to new simulation studies and measurements taken at the MATHUSLA test stand operating above ATLAS in 2018. We discuss next steps for the MATHUSLA collaboration, and identify areas where new members can make particularly important contributions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.01693v1-abstract-full').style.display = 'none'; document.getElementById('2009.01693v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">22 pages + references, 12 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-LHCC-2020-014, LHCC-I-031-ADD-1 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.00788">arXiv:2006.00788</a> <span> [<a href="https://arxiv.org/pdf/2006.00788">pdf</a>, <a href="https://arxiv.org/format/2006.00788">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 Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/15/09/C09048">10.1088/1748-0221/15/09/C09048 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exploring the lifetime and cosmic frontier with the MATHUSLA detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alpigiani%2C+C">Cristiano Alpigiani</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="2006.00788v2-abstract-short" style="display: inline;"> The MATHUSLA detector to be installed on the surface above and somewhat displaced from the CMS interaction point (IP) will cover an area of $100\times 100$ m$^2$ containing many layers of scintillators planes to establish the space and time coordinates of charged particle tracks. This is an unprecedented detector in terms of size and continuous sensitivity over an area of $10^4$ m$^2$. This docume… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00788v2-abstract-full').style.display = 'inline'; document.getElementById('2006.00788v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.00788v2-abstract-full" style="display: none;"> The MATHUSLA detector to be installed on the surface above and somewhat displaced from the CMS interaction point (IP) will cover an area of $100\times 100$ m$^2$ containing many layers of scintillators planes to establish the space and time coordinates of charged particle tracks. This is an unprecedented detector in terms of size and continuous sensitivity over an area of $10^4$ m$^2$. This document describes the present MATHUSLA detector concept that is sensitive to both long-lived particles produced in the LHC collisions in CMS and cosmic ray extended air showers (EAS). The ability to improve significantly cosmic ray studies by adding a $10^4$ m$^2$ layer of RPCs that have both digital and analogue readout similar to the ARGO-YBJ experiment will be discussed with focus on large zenith angle EAS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00788v2-abstract-full').style.display = 'none'; document.getElementById('2006.00788v2-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 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.02018">arXiv:2005.02018</a> <span> [<a href="https://arxiv.org/pdf/2005.02018">pdf</a>, <a href="https://arxiv.org/format/2005.02018">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2020.164661">10.1016/j.nima.2020.164661 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The MATHUSLA Test Stand </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alidra%2C+M">Maf Alidra</a>, <a href="/search/physics?searchtype=author&query=Alpigiani%2C+C">Cristiano Alpigiani</a>, <a href="/search/physics?searchtype=author&query=Ball%2C+A">Austin Ball</a>, <a href="/search/physics?searchtype=author&query=Camarri%2C+P">Paolo Camarri</a>, <a href="/search/physics?searchtype=author&query=Cardarelli%2C+R">Roberto Cardarelli</a>, <a href="/search/physics?searchtype=author&query=Chou%2C+J+P">John Paul Chou</a>, <a href="/search/physics?searchtype=author&query=Curtin%2C+D">David Curtin</a>, <a href="/search/physics?searchtype=author&query=Etzion%2C+E">Erez Etzion</a>, <a href="/search/physics?searchtype=author&query=Garabaglu%2C+A">Ali Garabaglu</a>, <a href="/search/physics?searchtype=author&query=Gomes%2C+B">Brandon Gomes</a>, <a href="/search/physics?searchtype=author&query=Guida%2C+R">Roberto Guida</a>, <a href="/search/physics?searchtype=author&query=Kuykendall%2C+W">W. Kuykendall</a>, <a href="/search/physics?searchtype=author&query=Kvam%2C+A">Audrey Kvam</a>, <a href="/search/physics?searchtype=author&query=Lazic%2C+D">Dragoslav Lazic</a>, <a href="/search/physics?searchtype=author&query=Lubatti%2C+H+J">H. J. Lubatti</a>, <a href="/search/physics?searchtype=author&query=Marsella%2C+G">Giovanni Marsella</a>, <a href="/search/physics?searchtype=author&query=Mizrachi%2C+G">Gilad Mizrachi</a>, <a href="/search/physics?searchtype=author&query=Policicchio%2C+A">Antonio Policicchio</a>, <a href="/search/physics?searchtype=author&query=Proffitt%2C+M">Mason Proffitt</a>, <a href="/search/physics?searchtype=author&query=Rothberg%2C+J">Joe Rothberg</a>, <a href="/search/physics?searchtype=author&query=Santonico%2C+R">Rinaldo Santonico</a>, <a href="/search/physics?searchtype=author&query=Silver%2C+Y">Yiftah Silver</a>, <a href="/search/physics?searchtype=author&query=Thayil%2C+S+A">Steffie Ann Thayil</a>, <a href="/search/physics?searchtype=author&query=Torro-Pastor%2C+E">Emma Torro-Pastor</a>, <a href="/search/physics?searchtype=author&query=Watts%2C+G">Gordon Watts</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2005.02018v2-abstract-short" style="display: inline;"> The rate of muons from LHC $pp$ collisions reaching the surface above the ATLAS interaction point is measured and compared with expected rates from decays of $W$ and $Z$ bosons and $b$- and $c$-quark jets. In addition, data collected during periods without beams circulating in the LHC provide a measurement of the background from cosmic ray inelastic backscattering that is compared to simulation pr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.02018v2-abstract-full').style.display = 'inline'; document.getElementById('2005.02018v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.02018v2-abstract-full" style="display: none;"> The rate of muons from LHC $pp$ collisions reaching the surface above the ATLAS interaction point is measured and compared with expected rates from decays of $W$ and $Z$ bosons and $b$- and $c$-quark jets. In addition, data collected during periods without beams circulating in the LHC provide a measurement of the background from cosmic ray inelastic backscattering that is compared to simulation predictions. Data were recorded during 2018 in a 2.5 $\times$ 2.5 $\times$ 6.5~$\rm{m}^3$ active volume MATHUSLA test stand detector unit consisting of two scintillator planes, one at the top and one at the bottom, which defined the trigger, and six layers of RPCs between them, grouped into three $(x,y)$-measuring layers separated by 1.74 m from each other. Triggers selecting both upward-going tracks and downward-going tracks were used. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.02018v2-abstract-full').style.display = 'none'; document.getElementById('2005.02018v2-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 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 11 figures, 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/1908.00802">arXiv:1908.00802</a> <span> [<a href="https://arxiv.org/pdf/1908.00802">pdf</a>, <a href="https://arxiv.org/format/1908.00802">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="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="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjqt/s40507-020-0080-0">10.1140/epjqt/s40507-020-0080-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=El-Neaj%2C+Y+A">Yousef Abou El-Neaj</a>, <a href="/search/physics?searchtype=author&query=Alpigiani%2C+C">Cristiano Alpigiani</a>, <a href="/search/physics?searchtype=author&query=Amairi-Pyka%2C+S">Sana Amairi-Pyka</a>, <a href="/search/physics?searchtype=author&query=Araujo%2C+H">Henrique Araujo</a>, <a href="/search/physics?searchtype=author&query=Balaz%2C+A">Antun Balaz</a>, <a href="/search/physics?searchtype=author&query=Bassi%2C+A">Angelo Bassi</a>, <a href="/search/physics?searchtype=author&query=Bathe-Peters%2C+L">Lars Bathe-Peters</a>, <a href="/search/physics?searchtype=author&query=Battelier%2C+B">Baptiste Battelier</a>, <a href="/search/physics?searchtype=author&query=Belic%2C+A">Aleksandar Belic</a>, <a href="/search/physics?searchtype=author&query=Bentine%2C+E">Elliot Bentine</a>, <a href="/search/physics?searchtype=author&query=Bernabeu%2C+J">Jose Bernabeu</a>, <a href="/search/physics?searchtype=author&query=Bertoldi%2C+A">Andrea Bertoldi</a>, <a href="/search/physics?searchtype=author&query=Bingham%2C+R">Robert Bingham</a>, <a href="/search/physics?searchtype=author&query=Blas%2C+D">Diego Blas</a>, <a href="/search/physics?searchtype=author&query=Bolpasi%2C+V">Vasiliki Bolpasi</a>, <a href="/search/physics?searchtype=author&query=Bongs%2C+K">Kai Bongs</a>, <a href="/search/physics?searchtype=author&query=Bose%2C+S">Sougato Bose</a>, <a href="/search/physics?searchtype=author&query=Bouyer%2C+P">Philippe Bouyer</a>, <a href="/search/physics?searchtype=author&query=Bowcock%2C+T">Themis Bowcock</a>, <a href="/search/physics?searchtype=author&query=Bowden%2C+W">William Bowden</a>, <a href="/search/physics?searchtype=author&query=Buchmueller%2C+O">Oliver Buchmueller</a>, <a href="/search/physics?searchtype=author&query=Burrage%2C+C">Clare Burrage</a>, <a href="/search/physics?searchtype=author&query=Calmet%2C+X">Xavier Calmet</a>, <a href="/search/physics?searchtype=author&query=Canuel%2C+B">Benjamin Canuel</a>, <a href="/search/physics?searchtype=author&query=Caramete%2C+L">Laurentiu-Ioan Caramete</a> , et al. (107 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.00802v2-abstract-short" style="display: inline;"> We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of LISA and the terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment for Dark Matter and Gravity Exploration (AEDGE), will also compl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.00802v2-abstract-full').style.display = 'inline'; document.getElementById('1908.00802v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.00802v2-abstract-full" style="display: none;"> We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of LISA and the terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment for Dark Matter and Gravity Exploration (AEDGE), will also complement other planned searches for dark matter, and exploit synergies with other gravitational wave detectors. We give examples of the extended range of sensitivity to ultra-light dark matter offered by AEDGE, and how its gravitational-wave measurements could explore the assembly of super-massive black holes, first-order phase transitions in the early universe and cosmic strings. AEDGE will be based upon technologies now being developed for terrestrial experiments using cold atoms, and will benefit from the space experience obtained with, e.g., LISA and cold atom experiments in microgravity. This paper is based on a submission (v1) in response to the Call for White Papers for the Voyage 2050 long-term plan in the ESA Science Programme. ESA limited the number of White Paper authors to 30. However, in this version (v2) we have welcomed as supporting authors participants in the Workshop on Atomic Experiments for Dark Matter and Gravity Exploration held at CERN: ({\tt https://indico.cern.ch/event/830432/}), as well as other interested scientists, and have incorporated additional material. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.00802v2-abstract-full').style.display = 'none'; document.getElementById('1908.00802v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">V2 -- added support authors</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> KCL-PH-TH/2019-65, CERN-TH-2019-126 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> EPJ Quantum Technol. 7, 6 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.00927">arXiv:1811.00927</a> <span> [<a href="https://arxiv.org/pdf/1811.00927">pdf</a>, <a href="https://arxiv.org/format/1811.00927">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> A Letter of Intent for MATHUSLA: a dedicated displaced vertex detector above ATLAS or CMS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alpigiani%2C+C">Cristiano Alpigiani</a>, <a href="/search/physics?searchtype=author&query=Ball%2C+A">Austin Ball</a>, <a href="/search/physics?searchtype=author&query=Barak%2C+L">Liron Barak</a>, <a href="/search/physics?searchtype=author&query=Beacham%2C+J">James Beacham</a>, <a href="/search/physics?searchtype=author&query=Benhammo%2C+Y">Yan Benhammo</a>, <a href="/search/physics?searchtype=author&query=Cao%2C+T">Tingting Cao</a>, <a href="/search/physics?searchtype=author&query=Camarri%2C+P">Paolo Camarri</a>, <a href="/search/physics?searchtype=author&query=Cardarelli%2C+R">Roberto Cardarelli</a>, <a href="/search/physics?searchtype=author&query=Rodriguez-Cahuantzi%2C+M">Mario Rodriguez-Cahuantzi</a>, <a href="/search/physics?searchtype=author&query=Chou%2C+J+P">John Paul Chou</a>, <a href="/search/physics?searchtype=author&query=Curtin%2C+D">David Curtin</a>, <a href="/search/physics?searchtype=author&query=Diamond%2C+M">Miriam Diamond</a>, <a href="/search/physics?searchtype=author&query=Di+Sciascio%2C+G">Giuseppe Di Sciascio</a>, <a href="/search/physics?searchtype=author&query=Drewes%2C+M">Marco Drewes</a>, <a href="/search/physics?searchtype=author&query=Eno%2C+S+C">Sarah C. Eno</a>, <a href="/search/physics?searchtype=author&query=Etzion%2C+E">Erez Etzion</a>, <a href="/search/physics?searchtype=author&query=Essig%2C+R">Rouven Essig</a>, <a href="/search/physics?searchtype=author&query=Evans%2C+J">Jared Evans</a>, <a href="/search/physics?searchtype=author&query=Fischer%2C+O">Oliver Fischer</a>, <a href="/search/physics?searchtype=author&query=Giagu%2C+S">Stefano Giagu</a>, <a href="/search/physics?searchtype=author&query=Gomes%2C+B">Brandon Gomes</a>, <a href="/search/physics?searchtype=author&query=Haas%2C+A">Andy Haas</a>, <a href="/search/physics?searchtype=author&query=Heng%2C+Y">Yuekun Heng</a>, <a href="/search/physics?searchtype=author&query=Iaselli%2C+G">Giuseppe Iaselli</a>, <a href="/search/physics?searchtype=author&query=Johns%2C+K">Ken Johns</a> , et al. (39 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="1811.00927v1-abstract-short" style="display: inline;"> In this Letter of Intent (LOI) we propose the construction of MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles), a dedicated large-volume displaced vertex detector for the HL-LHC on the surface above ATLAS or CMS. Such a detector, which can be built using existing technologies with a reasonable budget in time for the HL-LHC upgrade, could search for neutral long-lived particle… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.00927v1-abstract-full').style.display = 'inline'; document.getElementById('1811.00927v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.00927v1-abstract-full" style="display: none;"> In this Letter of Intent (LOI) we propose the construction of MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles), a dedicated large-volume displaced vertex detector for the HL-LHC on the surface above ATLAS or CMS. Such a detector, which can be built using existing technologies with a reasonable budget in time for the HL-LHC upgrade, could search for neutral long-lived particles (LLPs) with up to several orders of magnitude better sensitivity than ATLAS or CMS, while also acting as a cutting-edge cosmic ray telescope at CERN to explore many open questions in cosmic ray and astro-particle physics. We review the physics motivations for MATHUSLA and summarize its LLP reach for several different possible detector geometries, as well as outline the cosmic ray physics program. We present several updated background studies for MATHUSLA, which help inform a first detector-design concept utilizing modular construction with Resistive Plate Chambers (RPCs) as the primary tracking technology. We present first efficiency and reconstruction studies to verify the viability of this design concept, and we explore some aspects of its total cost. We end with a summary of recent progress made on the MATHUSLA test stand, a small-scale demonstrator experiment currently taking data at CERN Point 1, and finish with a short comment on future work. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.00927v1-abstract-full').style.display = 'none'; document.getElementById('1811.00927v1-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 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-LHCC-2018-025, LHCC-I-031 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 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