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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.07511">arXiv:2409.07511</a> <span> [<a href="https://arxiv.org/pdf/2409.07511">pdf</a>, <a href="https://arxiv.org/format/2409.07511">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 Astrophysical Phenomena">astro-ph.HE</span> </div> </div> <p class="title is-5 mathjax"> Initial performance of the Radar Echo Telescope for Cosmic Rays, RET-CR </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J">J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D">D. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Cummings%2C+A">A. Cummings</a>, <a href="/search/hep-ex?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/hep-ex?searchtype=author&query=De+Kockere%2C+S">S. De Kockere</a>, <a href="/search/hep-ex?searchtype=author&query=de+Vries%2C+K+D">K. D. de Vries</a>, <a href="/search/hep-ex?searchtype=author&query=Frikken%2C+D">D. Frikken</a>, <a href="/search/hep-ex?searchtype=author&query=Hast%2C+C">C. Hast</a>, <a href="/search/hep-ex?searchtype=author&query=Santiago%2C+E+H">E. Huesca Santiago</a>, <a href="/search/hep-ex?searchtype=author&query=Kuo%2C+C+-">C. -Y. Kuo</a>, <a href="/search/hep-ex?searchtype=author&query=Kyriacou%2C+A">A. Kyriacou</a>, <a href="/search/hep-ex?searchtype=author&query=Latif%2C+U+A">U. A. Latif</a>, <a href="/search/hep-ex?searchtype=author&query=Loonen%2C+J">J. Loonen</a>, <a href="/search/hep-ex?searchtype=author&query=Loudon%2C+I">I. Loudon</a>, <a href="/search/hep-ex?searchtype=author&query=Lukic%2C+V">V. Lukic</a>, <a href="/search/hep-ex?searchtype=author&query=McLennan%2C+C">C. McLennan</a>, <a href="/search/hep-ex?searchtype=author&query=Mulrey%2C+K">K. Mulrey</a>, <a href="/search/hep-ex?searchtype=author&query=Nam%2C+J">J. Nam</a>, <a href="/search/hep-ex?searchtype=author&query=Nivedita%2C+K">K. Nivedita</a>, <a href="/search/hep-ex?searchtype=author&query=Nozdrina%2C+A">A. Nozdrina</a>, <a href="/search/hep-ex?searchtype=author&query=Oberla%2C+E">E. Oberla</a>, <a href="/search/hep-ex?searchtype=author&query=Prohira%2C+S">S. Prohira</a>, <a href="/search/hep-ex?searchtype=author&query=Ralston%2C+J+P">J. P. Ralston</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="2409.07511v1-abstract-short" style="display: inline;"> The Radar Echo Telescope for Cosmic Rays (RET-CR), a pathfinder instrument for the radar echo method of ultrahigh energy (UHE) neutrino detection, was initially deployed near Summit Station, Greenland, in May 2023. After a 4 week commissioning period, 9 days of data were taken before the instrument went offline. In this article, we describe the instrument as it was deployed, and the initial perfor… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.07511v1-abstract-full').style.display = 'inline'; document.getElementById('2409.07511v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.07511v1-abstract-full" style="display: none;"> The Radar Echo Telescope for Cosmic Rays (RET-CR), a pathfinder instrument for the radar echo method of ultrahigh energy (UHE) neutrino detection, was initially deployed near Summit Station, Greenland, in May 2023. After a 4 week commissioning period, 9 days of data were taken before the instrument went offline. In this article, we describe the instrument as it was deployed, and the initial performance of the detector. We show that the technical aspects of running a radar based particle cascade detector in the ice have been demonstrated. Analysis of the 2023 data informed improvements that were incorporated into the May-August 2024 deployment, which has just concluded at time of writing. Results from the 2024 run will be presented in forthcoming publications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.07511v1-abstract-full').style.display = 'none'; document.getElementById('2409.07511v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To be submitted to PRD</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.09689">arXiv:2307.09689</a> <span> [<a href="https://arxiv.org/pdf/2307.09689">pdf</a>, <a href="https://arxiv.org/format/2307.09689">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="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.2023.168549">10.1016/j.nima.2023.168549 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electron-beam Calibration of Aerogel Tiles for the HELIX RICH Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Baiocchi%2C+M">M. Baiocchi</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Beaufore%2C+L">L. Beaufore</a>, <a href="/search/hep-ex?searchtype=author&query=Calderone%2C+D+H">D. H. Calderone</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Coutu%2C+S">S. Coutu</a>, <a href="/search/hep-ex?searchtype=author&query=Ellingwood%2C+E">E. Ellingwood</a>, <a href="/search/hep-ex?searchtype=author&query=Green%2C+N">N. Green</a>, <a href="/search/hep-ex?searchtype=author&query=Hanna%2C+D">D. Hanna</a>, <a href="/search/hep-ex?searchtype=author&query=Jeon%2C+H+B">H. B. Jeon</a>, <a href="/search/hep-ex?searchtype=author&query=Mbarek%2C+R">R. Mbarek</a>, <a href="/search/hep-ex?searchtype=author&query=McBride%2C+K">K. McBride</a>, <a href="/search/hep-ex?searchtype=author&query=Mognet%2C+I">I. Mognet</a>, <a href="/search/hep-ex?searchtype=author&query=Musser%2C+J">J. Musser</a>, <a href="/search/hep-ex?searchtype=author&query=Nutter%2C+S">S. Nutter</a>, <a href="/search/hep-ex?searchtype=author&query=O%27Brien%2C+S">S. O'Brien</a>, <a href="/search/hep-ex?searchtype=author&query=Park%2C+N">N. Park</a>, <a href="/search/hep-ex?searchtype=author&query=Rosin%2C+T">T. Rosin</a>, <a href="/search/hep-ex?searchtype=author&query=Tabata%2C+M">M. Tabata</a>, <a href="/search/hep-ex?searchtype=author&query=Tarl%C3%A9%2C+G">G. Tarl茅</a>, <a href="/search/hep-ex?searchtype=author&query=Visser%2C+G">G. Visser</a>, <a href="/search/hep-ex?searchtype=author&query=Wakely%2C+S+P">S. P. Wakely</a>, <a href="/search/hep-ex?searchtype=author&query=Yu%2C+M">M. Yu</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="2307.09689v1-abstract-short" style="display: inline;"> The HELIX cosmic-ray detector is a balloon-borne instrument designed to measure the flux of light isotopes in the energy range from 0.2 GeV/n to beyond 3 GeV/n. It will rely on a ring-imaging Cherenkov (RICH) detector for particle identification at energies greater than 1 GeV/n and will use aerogel tiles with refractive index near 1.15 as the radiator. To achieve the performance goals of the exper… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.09689v1-abstract-full').style.display = 'inline'; document.getElementById('2307.09689v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.09689v1-abstract-full" style="display: none;"> The HELIX cosmic-ray detector is a balloon-borne instrument designed to measure the flux of light isotopes in the energy range from 0.2 GeV/n to beyond 3 GeV/n. It will rely on a ring-imaging Cherenkov (RICH) detector for particle identification at energies greater than 1 GeV/n and will use aerogel tiles with refractive index near 1.15 as the radiator. To achieve the performance goals of the experiment it is necessary to know the refractive index and its position dependence over the lateral extent of the tiles to a precision of O(10$^{-4}). In this paper we describe the apparatus and methods developed to calibrate the HELIX tiles in an electron beam, in order to meet this requirement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.09689v1-abstract-full').style.display = 'none'; document.getElementById('2307.09689v1-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 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">27 pages and 16 figures. Accepted for publication in Nuclear Instruments and Methods A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.07846">arXiv:2201.07846</a> <span> [<a href="https://arxiv.org/pdf/2201.07846">pdf</a>, <a href="https://arxiv.org/format/2201.07846">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="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/10.1017/jog.2022.40">10.1017/jog.2022.40 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> In situ, broadband measurement of the radio frequency attenuation length at Summit Station, Greenland </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Aguilar%2C+J+A">J. A. Aguilar</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D">D. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Bishop%2C+A">A. Bishop</a>, <a href="/search/hep-ex?searchtype=author&query=Botner%2C+O">O. Botner</a>, <a href="/search/hep-ex?searchtype=author&query=Bouma%2C+S">S. Bouma</a>, <a href="/search/hep-ex?searchtype=author&query=Buitink%2C+S">S. Buitink</a>, <a href="/search/hep-ex?searchtype=author&query=Cataldo%2C+M">M. Cataldo</a>, <a href="/search/hep-ex?searchtype=author&query=Clark%2C+B+A">B. A. Clark</a>, <a href="/search/hep-ex?searchtype=author&query=Curtis-Ginsberg%2C+Z">Z. Curtis-Ginsberg</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Dasgupta%2C+P">P. Dasgupta</a>, <a href="/search/hep-ex?searchtype=author&query=de+Kockere%2C+S">S. de Kockere</a>, <a href="/search/hep-ex?searchtype=author&query=de+Vries%2C+K+D">K. D. de Vries</a>, <a href="/search/hep-ex?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/hep-ex?searchtype=author&query=DuVernois%2C+M+A">M. A. DuVernois</a>, <a href="/search/hep-ex?searchtype=author&query=Glaser%2C+C">C. Glaser</a>, <a href="/search/hep-ex?searchtype=author&query=Hallgren%2C+A">A. Hallgren</a>, <a href="/search/hep-ex?searchtype=author&query=Hallmann%2C+S">S. Hallmann</a>, <a href="/search/hep-ex?searchtype=author&query=Hanson%2C+J+C">J. C. Hanson</a>, <a href="/search/hep-ex?searchtype=author&query=Hendricks%2C+B">B. Hendricks</a>, <a href="/search/hep-ex?searchtype=author&query=Hornhuber%2C+C">C. Hornhuber</a>, <a href="/search/hep-ex?searchtype=author&query=Hughes%2C+K">K. Hughes</a>, <a href="/search/hep-ex?searchtype=author&query=Karle%2C+A">A. Karle</a> , et al. (36 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.07846v2-abstract-short" style="display: inline;"> Over the last 25 years, radiowave detection of neutrino-generated signals, using cold polar ice as the neutrino target, has emerged as perhaps the most promising technique for detection of extragalactic ultra-high energy neutrinos (corresponding to neutrino energies in excess of 0.01 Joules, or $10^{17}$ electron volts). During the summer of 2021 and in tandem with the initial deployment of the Ra… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.07846v2-abstract-full').style.display = 'inline'; document.getElementById('2201.07846v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.07846v2-abstract-full" style="display: none;"> Over the last 25 years, radiowave detection of neutrino-generated signals, using cold polar ice as the neutrino target, has emerged as perhaps the most promising technique for detection of extragalactic ultra-high energy neutrinos (corresponding to neutrino energies in excess of 0.01 Joules, or $10^{17}$ electron volts). During the summer of 2021 and in tandem with the initial deployment of the Radio Neutrino Observatory in Greenland (RNO-G), we conducted radioglaciological measurements at Summit Station, Greenland to refine our understanding of the ice target. We report the result of one such measurement, the radio-frequency electric field attenuation length $L_伪$. We find an approximately linear dependence of $L_伪$ on frequency with the best fit of the average field attenuation for the upper 1500 m of ice: $\langle L_伪\rangle = \big( (1154 \pm 121) - (0.81 \pm 0.14) (谓/$MHz$)\big)$ m for frequencies $谓\in [145 - 350]$ MHz. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.07846v2-abstract-full').style.display = 'none'; document.getElementById('2201.07846v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 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">13 pages, 8 figures, Accepted to Journal of Glaciology</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.07069">arXiv:2112.07069</a> <span> [<a href="https://arxiv.org/pdf/2112.07069">pdf</a>, <a href="https://arxiv.org/format/2112.07069">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 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/10.1103/PhysRevD.105.042001">10.1103/PhysRevD.105.042001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Analysis of a Tau Neutrino Origin for the Near-Horizon Air Shower Events Observed by the Fourth Flight of the Antarctic Impulsive Transient Antenna (ANITA) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Prechelt%2C+R">R. Prechelt</a>, <a href="/search/hep-ex?searchtype=author&query=Wissel%2C+S+A">S. A. Wissel</a>, <a href="/search/hep-ex?searchtype=author&query=Romero-Wolf%2C+A">A. Romero-Wolf</a>, <a href="/search/hep-ex?searchtype=author&query=Burch%2C+C">C. Burch</a>, <a href="/search/hep-ex?searchtype=author&query=Gorham%2C+P+W">P. W. Gorham</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+O">O. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Batten%2C+L">L. Batten</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Belov%2C+K">K. Belov</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D+Z">D. Z. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Binns%2C+W+R">W. R. Binns</a>, <a href="/search/hep-ex?searchtype=author&query=Bugaev%2C+V">V. Bugaev</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+P">P. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Carvalho%2C+W">W. Carvalho Jr.</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+C+H">C. H. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+P">P. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Clem%2C+J+M">J. M. Clem</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Cremonesi%2C+L">L. Cremonesi</a>, <a href="/search/hep-ex?searchtype=author&query=Dailey%2C+B">B. Dailey</a>, <a href="/search/hep-ex?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/hep-ex?searchtype=author&query=Dowkontt%2C+P+F">P. F. Dowkontt</a> , et al. (43 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="2112.07069v1-abstract-short" style="display: inline;"> We study in detail the sensitivity of the Antarctic Impulsive Transient Antenna (ANITA) to possible $谓_蟿$ point source fluxes detected via $蟿$-lepton-induced air showers. This investigation is framed around the observation of four upward-going extensive air shower events very close to the horizon seen in ANITA-IV. We find that these four upgoing events are not observationally inconsistent with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.07069v1-abstract-full').style.display = 'inline'; document.getElementById('2112.07069v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.07069v1-abstract-full" style="display: none;"> We study in detail the sensitivity of the Antarctic Impulsive Transient Antenna (ANITA) to possible $谓_蟿$ point source fluxes detected via $蟿$-lepton-induced air showers. This investigation is framed around the observation of four upward-going extensive air shower events very close to the horizon seen in ANITA-IV. We find that these four upgoing events are not observationally inconsistent with $蟿$-induced EASs from Earth-skimming $谓_蟿$, both in their spectral properties as well as in their observed locations on the sky. These four events, as well as the overall diffuse and point source exposure to Earth-skimming $谓_蟿$, are also compared against published ultrahigh-energy neutrino limits from the Pierre Auger Observatory. While none of these four events occurred at sky locations simultaneously visible by Auger, the implied fluence necessary for ANITA to observe these events is in strong tension with limits set by Auger across a wide range of energies and is additionally in tension with ANITA's Askaryan in-ice neutrino channel above $10^{19}$ eV. We conclude by discussing some of the technical challenges with simulating and analyzing these near horizon events and the potential for future observatories to observe similar events. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.07069v1-abstract-full').style.display = 'none'; document.getElementById('2112.07069v1-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 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 22 figures, will be published in Physical Review D (PRD)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.00459">arXiv:2104.00459</a> <span> [<a href="https://arxiv.org/pdf/2104.00459">pdf</a>, <a href="https://arxiv.org/format/2104.00459">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="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/10.1103/PhysRevD.104.102006">10.1103/PhysRevD.104.102006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Radar Echo Telescope for Cosmic Rays: Pathfinder Experiment for a Next-Generation Neutrino Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Prohira%2C+S">S. Prohira</a>, <a href="/search/hep-ex?searchtype=author&query=de+Vries%2C+K+D">K. D. de Vries</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J">J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D">D. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Dasgupta%2C+P">P. Dasgupta</a>, <a href="/search/hep-ex?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/hep-ex?searchtype=author&query=De+Kockere%2C+S">S. De Kockere</a>, <a href="/search/hep-ex?searchtype=author&query=Frikken%2C+D">D. Frikken</a>, <a href="/search/hep-ex?searchtype=author&query=Hast%2C+C">C. Hast</a>, <a href="/search/hep-ex?searchtype=author&query=Santiago%2C+E+H">E. Huesca Santiago</a>, <a href="/search/hep-ex?searchtype=author&query=Kuo%2C+C+-">C. -Y. Kuo</a>, <a href="/search/hep-ex?searchtype=author&query=Latif%2C+U+A">U. A. Latif</a>, <a href="/search/hep-ex?searchtype=author&query=Lukic%2C+V">V. Lukic</a>, <a href="/search/hep-ex?searchtype=author&query=Meures%2C+T">T. Meures</a>, <a href="/search/hep-ex?searchtype=author&query=Mulrey%2C+K">K. Mulrey</a>, <a href="/search/hep-ex?searchtype=author&query=Nam%2C+J">J. Nam</a>, <a href="/search/hep-ex?searchtype=author&query=Nozdrina%2C+A">A. Nozdrina</a>, <a href="/search/hep-ex?searchtype=author&query=Oberla%2C+E">E. Oberla</a>, <a href="/search/hep-ex?searchtype=author&query=Ralston%2C+J+P">J. P. Ralston</a>, <a href="/search/hep-ex?searchtype=author&query=Sbrocco%2C+C">C. Sbrocco</a>, <a href="/search/hep-ex?searchtype=author&query=Stanley%2C+R+S">R. S. Stanley</a>, <a href="/search/hep-ex?searchtype=author&query=Torres%2C+J">J. Torres</a>, <a href="/search/hep-ex?searchtype=author&query=Toscano%2C+S">S. Toscano</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.00459v2-abstract-short" style="display: inline;"> The Radar Echo Telescope for Cosmic Rays (RET-CR) is a recently initiated experiment designed to detect the englacial cascade of a cosmic-ray initiated air shower via in-ice radar, toward the goal of a full-scale, next-generation experiment to detect ultra high energy neutrinos in polar ice. For cosmic rays with a primary energy greater than 10 PeV, roughly 10% of an air-shower's energy reaches th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.00459v2-abstract-full').style.display = 'inline'; document.getElementById('2104.00459v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.00459v2-abstract-full" style="display: none;"> The Radar Echo Telescope for Cosmic Rays (RET-CR) is a recently initiated experiment designed to detect the englacial cascade of a cosmic-ray initiated air shower via in-ice radar, toward the goal of a full-scale, next-generation experiment to detect ultra high energy neutrinos in polar ice. For cosmic rays with a primary energy greater than 10 PeV, roughly 10% of an air-shower's energy reaches the surface of a high elevation ice-sheet ($\gtrsim$2 km) concentrated into a radius of roughly 10 cm. This penetrating shower core creates an in-ice cascade many orders of magnitude more dense than the preceding in-air cascade. This dense cascade can be detected via the radar echo technique, where transmitted radio is reflected from the ionization deposit left in the wake of the cascade. RET-CR will test the radar echo method in nature, with the in-ice cascade of a cosmic-ray initiated air-shower serving as a test beam. We present the projected event rate and sensitivity based upon a three part simulation using CORSIKA, GEANT4, and RadioScatter. RET-CR expects $\sim$1 radar echo event per day. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.00459v2-abstract-full').style.display = 'none'; document.getElementById('2104.00459v2-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 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.02892">arXiv:2010.02892</a> <span> [<a href="https://arxiv.org/pdf/2010.02892">pdf</a>, <a href="https://arxiv.org/format/2010.02892">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="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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/16/08/P08035">10.1088/1748-0221/16/08/P08035 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Payload for Ultrahigh Energy Observations (PUEO): A White Paper </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abarr%2C+Q">Q. Abarr</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Yebra%2C+J+A">J. Ammerman Yebra</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D+Z">D. Z. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+P">P. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Clem%2C+J+M">J. M. Clem</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Cremonesi%2C+L">L. Cremonesi</a>, <a href="/search/hep-ex?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/hep-ex?searchtype=author&query=Flaherty%2C+J">J. Flaherty</a>, <a href="/search/hep-ex?searchtype=author&query=Frikken%2C+D">D. Frikken</a>, <a href="/search/hep-ex?searchtype=author&query=Gorham%2C+P+W">P. W. Gorham</a>, <a href="/search/hep-ex?searchtype=author&query=Hast%2C+C">C. Hast</a>, <a href="/search/hep-ex?searchtype=author&query=Hornhuber%2C+C">C. Hornhuber</a>, <a href="/search/hep-ex?searchtype=author&query=Huang%2C+J+J">J. J. Huang</a>, <a href="/search/hep-ex?searchtype=author&query=Hughes%2C+K">K. Hughes</a>, <a href="/search/hep-ex?searchtype=author&query=Hynous%2C+A">A. Hynous</a>, <a href="/search/hep-ex?searchtype=author&query=Ku%2C+Y">Y. Ku</a>, <a href="/search/hep-ex?searchtype=author&query=Kuo%2C+C+-">C. -Y. Kuo</a>, <a href="/search/hep-ex?searchtype=author&query=Liu%2C+T+C">T. C. Liu</a>, <a href="/search/hep-ex?searchtype=author&query=Martin%2C+Z">Z. Martin</a>, <a href="/search/hep-ex?searchtype=author&query=Miki%2C+C">C. Miki</a> , et al. (25 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="2010.02892v3-abstract-short" style="display: inline;"> The Payload for Ultrahigh Energy Observations (PUEO) long-duration balloon experiment is designed to have world-leading sensitivity to ultrahigh-energy neutrinos at energies above 1 EeV. Probing this energy region is essential for understanding the extreme-energy universe at all distance scales. PUEO leverages experience from and supersedes the successful Antarctic Impulsive Transient Antenna (ANI… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.02892v3-abstract-full').style.display = 'inline'; document.getElementById('2010.02892v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.02892v3-abstract-full" style="display: none;"> The Payload for Ultrahigh Energy Observations (PUEO) long-duration balloon experiment is designed to have world-leading sensitivity to ultrahigh-energy neutrinos at energies above 1 EeV. Probing this energy region is essential for understanding the extreme-energy universe at all distance scales. PUEO leverages experience from and supersedes the successful Antarctic Impulsive Transient Antenna (ANITA) program, with an improved design that drastically improves sensitivity by more than an order of magnitude at energies below 30 EeV. PUEO will either make the first significant detection of or set the best limits on ultrahigh-energy neutrino fluxes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.02892v3-abstract-full').style.display = 'none'; document.getElementById('2010.02892v3-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 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">40 pages, 17 figures. Version accepted to JINST</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 16 (2021) 08, P08035 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.02869">arXiv:2010.02869</a> <span> [<a href="https://arxiv.org/pdf/2010.02869">pdf</a>, <a href="https://arxiv.org/format/2010.02869">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 Astrophysical Phenomena">astro-ph.HE</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> </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/10.1088/1475-7516/2021/04/017">10.1088/1475-7516/2021/04/017 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A search for ultrahigh-energy neutrinos associated with astrophysical sources using the third flight of ANITA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/hep-ex?searchtype=author&query=Batten%2C+L">L. Batten</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+O">O. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Belov%2C+K">K. Belov</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D+Z">D. Z. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Binns%2C+W+R">W. R. Binns</a>, <a href="/search/hep-ex?searchtype=author&query=Bugaev%2C+V">V. Bugaev</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+P">P. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+C+H">C. H. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+P">P. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Clem%2C+J+M">J. M. Clem</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Cremonesi%2C+L">L. Cremonesi</a>, <a href="/search/hep-ex?searchtype=author&query=Dailey%2C+B">B. Dailey</a>, <a href="/search/hep-ex?searchtype=author&query=Dowkontt%2C+P+F">P. F. Dowkontt</a>, <a href="/search/hep-ex?searchtype=author&query=Fox%2C+B+D">B. D. Fox</a>, <a href="/search/hep-ex?searchtype=author&query=Gordon%2C+J+W+H">J. W. H. Gordon</a>, <a href="/search/hep-ex?searchtype=author&query=Gorham%2C+P+W">P. W. Gorham</a>, <a href="/search/hep-ex?searchtype=author&query=Hast%2C+C">C. Hast</a>, <a href="/search/hep-ex?searchtype=author&query=Hill%2C+B">B. Hill</a>, <a href="/search/hep-ex?searchtype=author&query=Hsu%2C+S+Y">S. Y. Hsu</a>, <a href="/search/hep-ex?searchtype=author&query=Huang%2C+J+J">J. J. Huang</a> , et al. (38 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="2010.02869v3-abstract-short" style="display: inline;"> The ANtarctic Impulsive Transient Antenna (ANITA) long-duration balloon experiment is sensitive to interactions of ultra high-energy (E > 10^{18} eV) neutrinos in the Antarctic ice sheet. The third flight of ANITA, lasting 22 days, began in December 2014. We develop a methodology to search for energetic neutrinos spatially and temporally coincident with potential source classes in ANITA data. This… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.02869v3-abstract-full').style.display = 'inline'; document.getElementById('2010.02869v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.02869v3-abstract-full" style="display: none;"> The ANtarctic Impulsive Transient Antenna (ANITA) long-duration balloon experiment is sensitive to interactions of ultra high-energy (E > 10^{18} eV) neutrinos in the Antarctic ice sheet. The third flight of ANITA, lasting 22 days, began in December 2014. We develop a methodology to search for energetic neutrinos spatially and temporally coincident with potential source classes in ANITA data. This methodology is applied to several source classes: the TXS 0506+056 blazar and NGC 1068, the first potential TeV neutrino sources identified by IceCube, flaring high-energy blazars reported by the Fermi All-Sky Variability Analysis, gamma-ray bursts, and supernovae. Among searches within the five source classes, one candidate was identified as associated with SN 2015D, although not at a statistically significant level. We proceed to place upper limits on the source classes. We further comment on potential applications of this methodology to more sensitive future instruments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.02869v3-abstract-full').style.display = 'none'; document.getElementById('2010.02869v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">23 pages, 7 figures, version accepted to JCAP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.12830">arXiv:1910.12830</a> <span> [<a href="https://arxiv.org/pdf/1910.12830">pdf</a>, <a href="https://arxiv.org/format/1910.12830">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 Astrophysical Phenomena">astro-ph.HE</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> </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.124.091101">10.1103/PhysRevLett.124.091101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of Radar Echoes From High-Energy Particle Cascades </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Prohira%2C+S">S. Prohira</a>, <a href="/search/hep-ex?searchtype=author&query=de+Vries%2C+K+D">K. D. de Vries</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J">J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D">D. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=van+Eijndhoven%2C+N">N. van Eijndhoven</a>, <a href="/search/hep-ex?searchtype=author&query=Hast%2C+C">C. Hast</a>, <a href="/search/hep-ex?searchtype=author&query=Kuo%2C+C+-">C. -Y Kuo</a>, <a href="/search/hep-ex?searchtype=author&query=Latif%2C+U+A">U. A. Latif</a>, <a href="/search/hep-ex?searchtype=author&query=Meures%2C+T">T. Meures</a>, <a href="/search/hep-ex?searchtype=author&query=Nam%2C+J">J. Nam</a>, <a href="/search/hep-ex?searchtype=author&query=Nozdrina%2C+A">A. Nozdrina</a>, <a href="/search/hep-ex?searchtype=author&query=Ralston%2C+J+P">J. P. Ralston</a>, <a href="/search/hep-ex?searchtype=author&query=Riesen%2C+Z">Z. Riesen</a>, <a href="/search/hep-ex?searchtype=author&query=Sbrocco%2C+C">C. Sbrocco</a>, <a href="/search/hep-ex?searchtype=author&query=Torres%2C+J">J. Torres</a>, <a href="/search/hep-ex?searchtype=author&query=Wissel%2C+S">S. Wissel</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="1910.12830v1-abstract-short" style="display: inline;"> We report the observation of radar echoes from the ionization trails of high-energy particle cascades. These data were taken at the SLAC National Accelerator Laboratory, where the full electron beam ($\sim$10$^9$ e$^-$ at $\sim$10 GeV/e$^-$) was directed into a plastic target to simulate an ultra high-energy neutrino interaction. This target was interrogated with radio waves, and coherent radio re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.12830v1-abstract-full').style.display = 'inline'; document.getElementById('1910.12830v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.12830v1-abstract-full" style="display: none;"> We report the observation of radar echoes from the ionization trails of high-energy particle cascades. These data were taken at the SLAC National Accelerator Laboratory, where the full electron beam ($\sim$10$^9$ e$^-$ at $\sim$10 GeV/e$^-$) was directed into a plastic target to simulate an ultra high-energy neutrino interaction. This target was interrogated with radio waves, and coherent radio reflections from the cascades were detected, with properties consistent with theoretical expectations. This is the first definitive observation of radar echoes from high-energy particle cascades, which may lead to a viable neutrino detection technology for energies $\gtrsim 10^{16}$ eV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.12830v1-abstract-full').style.display = 'none'; document.getElementById('1910.12830v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">6 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 124, 091101 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1901.06663">arXiv:1901.06663</a> <span> [<a href="https://arxiv.org/pdf/1901.06663">pdf</a>, <a href="https://arxiv.org/ps/1901.06663">ps</a>, <a href="https://arxiv.org/format/1901.06663">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</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.2019.02.006">10.1016/j.nima.2019.02.006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Developing a silica aerogel radiator for the HELIX ring-imaging Cherenkov system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Tabata%2C+M">Makoto Tabata</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">Patrick Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">James J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Coutu%2C+S">Stephane Coutu</a>, <a href="/search/hep-ex?searchtype=author&query=Gebhard%2C+M">Mark Gebhard</a>, <a href="/search/hep-ex?searchtype=author&query=Green%2C+N">Noah Green</a>, <a href="/search/hep-ex?searchtype=author&query=Hanna%2C+D">David Hanna</a>, <a href="/search/hep-ex?searchtype=author&query=Kunkler%2C+B">Brandon Kunkler</a>, <a href="/search/hep-ex?searchtype=author&query=Lang%2C+M">Mike Lang</a>, <a href="/search/hep-ex?searchtype=author&query=McBride%2C+K">Keith McBride</a>, <a href="/search/hep-ex?searchtype=author&query=Mognet%2C+I">Isaac Mognet</a>, <a href="/search/hep-ex?searchtype=author&query=M%C3%BCller%2C+D">Dietrich M眉ller</a>, <a href="/search/hep-ex?searchtype=author&query=Musser%2C+J">James Musser</a>, <a href="/search/hep-ex?searchtype=author&query=Nutter%2C+S">Scott Nutter</a>, <a href="/search/hep-ex?searchtype=author&query=Park%2C+N">Nahee Park</a>, <a href="/search/hep-ex?searchtype=author&query=Schubnell%2C+M">Michael Schubnell</a>, <a href="/search/hep-ex?searchtype=author&query=Tarl%C3%A9%2C+G">Gregory Tarl茅</a>, <a href="/search/hep-ex?searchtype=author&query=Tomasch%2C+A">Andrew Tomasch</a>, <a href="/search/hep-ex?searchtype=author&query=Visser%2C+G">Gerard Visser</a>, <a href="/search/hep-ex?searchtype=author&query=Wakely%2C+S+P">Scott P. Wakely</a>, <a href="/search/hep-ex?searchtype=author&query=Wisher%2C+I">Ian Wisher</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="1901.06663v1-abstract-short" style="display: inline;"> This paper reports the successful fabrication of silica aerogel Cherenkov radiators produced in the first batches from a 96-tile mass production performed using pin-drying technique in our laboratory. The aerogels are to be used in a ring-imaging Cherenkov detector in the spectrometer of a planned balloon-borne cosmic-ray observation program, HELIX (High Energy Light Isotope eXperiment). A total o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.06663v1-abstract-full').style.display = 'inline'; document.getElementById('1901.06663v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1901.06663v1-abstract-full" style="display: none;"> This paper reports the successful fabrication of silica aerogel Cherenkov radiators produced in the first batches from a 96-tile mass production performed using pin-drying technique in our laboratory. The aerogels are to be used in a ring-imaging Cherenkov detector in the spectrometer of a planned balloon-borne cosmic-ray observation program, HELIX (High Energy Light Isotope eXperiment). A total of 36 transparent, hydrophobic aerogel tiles with a high refractive index of 1.16 and dimensions of 10 cm $\times $ 10 cm $\times $ 1 cm will be chosen as the flight radiators. Thus far, 40 out of the 48 tiles fabricated were confirmed as having no tile cracking. In the first screening, 8 out of the first 16 tiles were accepted as flight-qualified candidates, based on basic optical measurement results. To fit the aerogel tiles into a radiator support structure, the trimming of previously manufactured prototype tiles using a water-jet cutting device was successful. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.06663v1-abstract-full').style.display = 'none'; document.getElementById('1901.06663v1-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 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to Nucl. Instrum. Methods Phys. Res. A (NIMA Proc. Special Issue: RICH 2018), 5 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Instruments and Methods in Physics Research A 952 (2020) 161879 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1803.02719">arXiv:1803.02719</a> <span> [<a href="https://arxiv.org/pdf/1803.02719">pdf</a>, <a href="https://arxiv.org/format/1803.02719">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 Astrophysical Phenomena">astro-ph.HE</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> </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.98.022001">10.1103/PhysRevD.98.022001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Constraints on the diffuse high-energy neutrino flux from the third flight of ANITA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Gorham%2C+P+W">P. W. Gorham</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Banerjee%2C+O">O. Banerjee</a>, <a href="/search/hep-ex?searchtype=author&query=Batten%2C+L">L. Batten</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Bechtol%2C+K">K. Bechtol</a>, <a href="/search/hep-ex?searchtype=author&query=Belov%2C+K">K. Belov</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D+Z">D. Z. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Binns%2C+W+R">W. R. Binns</a>, <a href="/search/hep-ex?searchtype=author&query=Bugaev%2C+V">V. Bugaev</a>, <a href="/search/hep-ex?searchtype=author&query=Cao%2C+P">P. Cao</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+C+C">C. C. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+C+H">C. H. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+P">P. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Clem%2C+J+M">J. M. Clem</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Cremonesi%2C+L">L. Cremonesi</a>, <a href="/search/hep-ex?searchtype=author&query=Dailey%2C+B">B. Dailey</a>, <a href="/search/hep-ex?searchtype=author&query=Deaconu%2C+C">C. Deaconu</a>, <a href="/search/hep-ex?searchtype=author&query=Dowkontt%2C+P+F">P. F. Dowkontt</a>, <a href="/search/hep-ex?searchtype=author&query=Fox%2C+B+D">B. D. Fox</a>, <a href="/search/hep-ex?searchtype=author&query=Gordon%2C+J+W+H">J. W. H. Gordon</a>, <a href="/search/hep-ex?searchtype=author&query=Hast%2C+C">C. Hast</a>, <a href="/search/hep-ex?searchtype=author&query=Hill%2C+B">B. Hill</a>, <a href="/search/hep-ex?searchtype=author&query=Hsu%2C+S+Y">S. Y. Hsu</a> , et al. (35 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1803.02719v3-abstract-short" style="display: inline;"> The Antarctic Impulsive Transient Antenna (ANITA), a NASA long-duration balloon payload, searches for radio emission from interactions of ultra-high-energy neutrinos in polar ice. The third flight of ANITA (ANITA-III) was launched in December 2014 and completed a 22-day flight. We present the results of three analyses searching for Askaryan radio emission of neutrino origin. In the most sensitive… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.02719v3-abstract-full').style.display = 'inline'; document.getElementById('1803.02719v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1803.02719v3-abstract-full" style="display: none;"> The Antarctic Impulsive Transient Antenna (ANITA), a NASA long-duration balloon payload, searches for radio emission from interactions of ultra-high-energy neutrinos in polar ice. The third flight of ANITA (ANITA-III) was launched in December 2014 and completed a 22-day flight. We present the results of three analyses searching for Askaryan radio emission of neutrino origin. In the most sensitive of the analyses, we find one event in the signal region on an expected a priori background of $0.7^{+0.5}_{-0.3}$. Though consistent with the background estimate, the candidate event remains compatible with a neutrino hypothesis even after additional post-unblinding scrutiny. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.02719v3-abstract-full').style.display = 'none'; document.getElementById('1803.02719v3-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 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 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">15 pages, 15 figures, Accepted to PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 98, 022001 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.08509">arXiv:1610.08509</a> <span> [<a href="https://arxiv.org/pdf/1610.08509">pdf</a>, <a href="https://arxiv.org/format/1610.08509">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 Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.117.192001">10.1103/PhysRevLett.117.192001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Aab%2C+A">A. Aab</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Samarai%2C+I+A">I. Al Samarai</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Almela%2C+A">A. Almela</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+G+A">G. A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andrada%2C+B">B. Andrada</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Arsene%2C+N">N. Arsene</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Avila%2C+G">G. Avila</a> , et al. (413 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="1610.08509v2-abstract-short" style="display: inline;"> Ultrahigh energy cosmic ray air showers probe particle physics at energies beyond the reach of accelerators. Here we introduce a new method to test hadronic interaction models without relying on the absolute energy calibration, and apply it to events with primary energy 6-16 EeV (E_CM = 110-170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08509v2-abstract-full').style.display = 'inline'; document.getElementById('1610.08509v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.08509v2-abstract-full" style="display: none;"> Ultrahigh energy cosmic ray air showers probe particle physics at energies beyond the reach of accelerators. Here we introduce a new method to test hadronic interaction models without relying on the absolute energy calibration, and apply it to events with primary energy 6-16 EeV (E_CM = 110-170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre Auger Observatory. The average hadronic shower is 1.33 +- 0.16 (1.61 +- 0.21) times larger than predicted using the leading LHC-tuned models EPOS-LHC (QGSJetII-04), with a corresponding excess of muons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08509v2-abstract-full').style.display = 'none'; document.getElementById('1610.08509v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 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">Published version. Added journal reference and DOI. Added Report Number</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-16-504-AD-AE-CD-TD </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 117, 192001 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.02564">arXiv:1605.02564</a> <span> [<a href="https://arxiv.org/pdf/1605.02564">pdf</a>, <a href="https://arxiv.org/format/1605.02564">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 Astrophysical Phenomena">astro-ph.HE</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> </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.116.241101">10.1103/PhysRevLett.116.241101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Aab%2C+A">Alexander Aab</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">Pedro Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">Marco Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E">Eun-Joo Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Samarai%2C+I+A">Imen Al Samarai</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I">Ivone Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">Ingomar Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">Patrick Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Almela%2C+A">Alejandro Almela</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">Jesus Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">Jaime Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Batista%2C+R+A">Rafael Alves Batista</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">Michelangelo Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">Amin Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+G+A">Gioacchino Alex Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">Luis Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">Sofia Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">Carla Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">Fernando Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Arsene%2C+N">Nicusor Arsene</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H+G">Hern谩n Gonzalo Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">Pedro Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">Julien Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Avila%2C+G">Gualberto Avila</a> , et al. (425 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="1605.02564v2-abstract-short" style="display: inline;"> We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8 \pm 0.7 (stat) \pm 6.7 (sys) MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cos… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.02564v2-abstract-full').style.display = 'inline'; document.getElementById('1605.02564v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.02564v2-abstract-full" style="display: none;"> We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8 \pm 0.7 (stat) \pm 6.7 (sys) MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cosmic-ray energy. A comparison with predictions from state-of-the-art first-principle calculations shows agreement with our measurement. The radiation energy provides direct access to the calorimetric energy in the electromagnetic cascade of extensive air showers. Comparison with our result thus allows the direct calibration of any cosmic-ray radio detector against the well-established energy scale of the Pierre Auger Observatory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.02564v2-abstract-full').style.display = 'none'; document.getElementById('1605.02564v2-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 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Replaced with published version. Added journal reference and DOI. Supplemental material in the ancillary files</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-16-169-AD-AE-CD-TD </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 116, 241101 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.01625">arXiv:1605.01625</a> <span> [<a href="https://arxiv.org/pdf/1605.01625">pdf</a>, <a href="https://arxiv.org/format/1605.01625">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/11/02/P02012">10.1088/1748-0221/11/02/P02012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Prototype muon detectors for the AMIGA component of the Pierre Auger Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Aab%2C+A">A. Aab</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Samarai%2C+I+A">I. Al Samarai</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Almela%2C+A">A. Almela</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Batista%2C+R+A">R. Alves Batista</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+G+A">G. A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andrada%2C+B">B. Andrada</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Arsene%2C+N">N. Arsene</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a> , et al. (429 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="1605.01625v2-abstract-short" style="display: inline;"> Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory to extend its range of detection and to directly measure the muon content of the particle showers. It consists of an infill of surface water-Cherenkov detectors accompanied by buried scintillator detectors used for muon counting. The main objectives of the AMIGA engineering array, referred to as the Unitary… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.01625v2-abstract-full').style.display = 'inline'; document.getElementById('1605.01625v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.01625v2-abstract-full" style="display: none;"> Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory to extend its range of detection and to directly measure the muon content of the particle showers. It consists of an infill of surface water-Cherenkov detectors accompanied by buried scintillator detectors used for muon counting. The main objectives of the AMIGA engineering array, referred to as the Unitary Cell, are to identify and resolve all engineering issues as well as to understand the muon-number counting uncertainties related to the design of the detector. The mechanical design, fabrication and deployment processes of the muon counters of the Unitary Cell are described in this document. These muon counters modules comprise sealed PVC casings containing plastic scintillation bars, wavelength-shifter optical fibers, 64 pixel photomultiplier tubes, and acquisition electronics. The modules are buried approximately 2.25 m below ground level in order to minimize contamination from electromagnetic shower particles. The mechanical setup, which allows access to the electronics for maintenance, is also described in addition to tests of the modules' response and integrity. The completed Unitary Cell has measured a number of air showers of which a first analysis of a sample event is included here. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.01625v2-abstract-full').style.display = 'none'; document.getElementById('1605.01625v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Replaced with published version. Added journal reference and DOI</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-16-164-AD-AE-CD-TD </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 11 (2016) P02012 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.02216">arXiv:1512.02216</a> <span> [<a href="https://arxiv.org/pdf/1512.02216">pdf</a>, <a href="https://arxiv.org/format/1512.02216">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/11/01/P01018">10.1088/1748-0221/11/01/P01018 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nanosecond-level time synchronization of autonomous radio detector stations for extensive air showers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Aab%2C+A">A. Aab</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Samarai%2C+I+A">I. Al Samarai</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Almela%2C+A">A. Almela</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Batista%2C+R+A">R. Alves Batista</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anastasi%2C+G+A">G. A. Anastasi</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Arsene%2C+N">N. Arsene</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Avila%2C+G">G. Avila</a> , et al. (426 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="1512.02216v2-abstract-short" style="display: inline;"> To exploit the full potential of radio measurements of cosmic-ray air showers at MHz frequencies, a detector timing synchronization within 1 ns is needed. Large distributed radio detector arrays such as the Auger Engineering Radio Array (AERA) rely on timing via the Global Positioning System (GPS) for the synchronization of individual detector station clocks. Unfortunately, GPS timing is expected… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.02216v2-abstract-full').style.display = 'inline'; document.getElementById('1512.02216v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.02216v2-abstract-full" style="display: none;"> To exploit the full potential of radio measurements of cosmic-ray air showers at MHz frequencies, a detector timing synchronization within 1 ns is needed. Large distributed radio detector arrays such as the Auger Engineering Radio Array (AERA) rely on timing via the Global Positioning System (GPS) for the synchronization of individual detector station clocks. Unfortunately, GPS timing is expected to have an accuracy no better than about 5 ns. In practice, in particular in AERA, the GPS clocks exhibit drifts on the order of tens of ns. We developed a technique to correct for the GPS drifts, and an independent method is used for cross-checks that indeed we reach nanosecond-scale timing accuracy by this correction. First, we operate a "beacon transmitter" which emits defined sine waves detected by AERA antennas recorded within the physics data. The relative phasing of these sine waves can be used to correct for GPS clock drifts. In addition to this, we observe radio pulses emitted by commercial airplanes, the position of which we determine in real time from Automatic Dependent Surveillance Broadcasts intercepted with a software-defined radio. From the known source location and the measured arrival times of the pulses we determine relative timing offsets between radio detector stations. We demonstrate with a combined analysis that the two methods give a consistent timing calibration with an accuracy of 2 ns or better. Consequently, the beacon method alone can be used in the future to continuously determine and correct for GPS clock drifts in each individual event measured by AERA. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.02216v2-abstract-full').style.display = 'none'; document.getElementById('1512.02216v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages. Replaced with published version. Added journal reference and DOI</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-15-560-AD-CD-TD </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 11 (2016) P01018 11 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1511.02109">arXiv:1511.02109</a> <span> [<a href="https://arxiv.org/pdf/1511.02109">pdf</a>, <a href="https://arxiv.org/format/1511.02109">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 Astrophysical Phenomena">astro-ph.HE</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> </div> </div> <p class="title is-5 mathjax"> The IceCube Neutrino Observatory, the Pierre Auger Observatory and the Telescope Array: Joint Contribution to the 34th International Cosmic Ray Conference (ICRC 2015) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=IceCube+Collaboration"> IceCube Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Aartsen%2C+M+G">M. G. Aartsen</a>, <a href="/search/hep-ex?searchtype=author&query=Abraham%2C+K">K. Abraham</a>, <a href="/search/hep-ex?searchtype=author&query=Ackermann%2C+M">M. Ackermann</a>, <a href="/search/hep-ex?searchtype=author&query=Adams%2C+J">J. Adams</a>, <a href="/search/hep-ex?searchtype=author&query=Aguilar%2C+J+A">J. A. Aguilar</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlers%2C+M">M. Ahlers</a>, <a href="/search/hep-ex?searchtype=author&query=Ahrens%2C+M">M. Ahrens</a>, <a href="/search/hep-ex?searchtype=author&query=Altmann%2C+D">D. Altmann</a>, <a href="/search/hep-ex?searchtype=author&query=Anderson%2C+T">T. Anderson</a>, <a href="/search/hep-ex?searchtype=author&query=Ansseau%2C+I">I. Ansseau</a>, <a href="/search/hep-ex?searchtype=author&query=Archinger%2C+M">M. Archinger</a>, <a href="/search/hep-ex?searchtype=author&query=Arguelles%2C+C">C. Arguelles</a>, <a href="/search/hep-ex?searchtype=author&query=Arlen%2C+T+C">T. C. Arlen</a>, <a href="/search/hep-ex?searchtype=author&query=Auffenberg%2C+J">J. Auffenberg</a>, <a href="/search/hep-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/hep-ex?searchtype=author&query=Barwick%2C+S+W">S. W. Barwick</a>, <a href="/search/hep-ex?searchtype=author&query=Baum%2C+V">V. Baum</a>, <a href="/search/hep-ex?searchtype=author&query=Bay%2C+R">R. Bay</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Tjus%2C+J+B">J. Becker Tjus</a>, <a href="/search/hep-ex?searchtype=author&query=Becker%2C+K+-">K. -H. Becker</a>, <a href="/search/hep-ex?searchtype=author&query=Beiser%2C+E">E. Beiser</a>, <a href="/search/hep-ex?searchtype=author&query=BenZvi%2C+S">S. BenZvi</a>, <a href="/search/hep-ex?searchtype=author&query=Berghaus%2C+P">P. Berghaus</a> , et al. (869 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="1511.02109v1-abstract-short" style="display: inline;"> We have conducted three searches for correlations between ultra-high energy cosmic rays detected by the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidate events from IceCube. Two cross-correlation analyses with UHECRs are done: one with 39 cascades from the IceCube `high-energy starting events' sample and the other with 16 high-energy `track events'. The angular… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.02109v1-abstract-full').style.display = 'inline'; document.getElementById('1511.02109v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1511.02109v1-abstract-full" style="display: none;"> We have conducted three searches for correlations between ultra-high energy cosmic rays detected by the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidate events from IceCube. Two cross-correlation analyses with UHECRs are done: one with 39 cascades from the IceCube `high-energy starting events' sample and the other with 16 high-energy `track events'. The angular separation between the arrival directions of neutrinos and UHECRs is scanned over. The same events are also used in a separate search using a maximum likelihood approach, after the neutrino arrival directions are stacked. To estimate the significance we assume UHECR magnetic deflections to be inversely proportional to their energy, with values $3^\circ$, $6^\circ$ and $9^\circ$ at 100 EeV to allow for the uncertainties on the magnetic field strength and UHECR charge. A similar analysis is performed on stacked UHECR arrival directions and the IceCube sample of through-going muon track events which were optimized for neutrino point-source searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.02109v1-abstract-full').style.display = 'none'; document.getElementById('1511.02109v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 November, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">one proceeding, the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands; will appear in PoS(ICRC2015)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.07786">arXiv:1503.07786</a> <span> [<a href="https://arxiv.org/pdf/1503.07786">pdf</a>, <a href="https://arxiv.org/format/1503.07786">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 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/10.1088/1475-7516/2015/08/049">10.1088/1475-7516/2015/08/049 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the cosmic ray spectrum above $4{\times}10^{18}$ eV using inclined events detected with the Pierre Auger Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Aab%2C+A">Alexander Aab</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">Pedro Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">Marco Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E">Eun-Joo Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Samarai%2C+I+A">Imen Al Samarai</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I">Ivone Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">Ingomar Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">Patrick Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Almela%2C+A">Alejandro Almela</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">Jesus Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">Jaime Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Batista%2C+R+A">Rafael Alves Batista</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">Michelangelo Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">Amin Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">Luis Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">Sofia Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">Carla Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Aranda%2C+V+M">Victor Manuel Aranda</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">Fernando Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Arsene%2C+N">Nicusor Arsene</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H+G">Hern谩n Gonzalo Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">Pedro Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">Julien Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">Maximo Ave</a> , et al. (439 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1503.07786v2-abstract-short" style="display: inline;"> A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\times}10^{18}$ eV, the "ankle", the fl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.07786v2-abstract-full').style.display = 'inline'; document.getElementById('1503.07786v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.07786v2-abstract-full" style="display: none;"> A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\times}10^{18}$ eV, the "ankle", the flux can be described by a power law $E^{-纬}$ with index $纬=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)}$ followed by a smooth suppression region. For the energy ($E_\text{s}$) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find $E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19}$ eV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.07786v2-abstract-full').style.display = 'none'; document.getElementById('1503.07786v2-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 November, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Replaced with published version. Added journal reference and DOI</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-15-099-AD-AE-CD-TD </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JCAP 08 (2015) 049 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1407.3214">arXiv:1407.3214</a> <span> [<a href="https://arxiv.org/pdf/1407.3214">pdf</a>, <a href="https://arxiv.org/ps/1407.3214">ps</a>, <a href="https://arxiv.org/format/1407.3214">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 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/10.1088/1475-7516/2014/08/019">10.1088/1475-7516/2014/08/019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reconstruction of inclined air showers detected with the Pierre Auger Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Aab%2C+A">A. Aab</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahlers%2C+M">M. Ahlers</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Samarai%2C+I+A">I. Al Samarai</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Almela%2C+A">A. Almela</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Batista%2C+R+A">R. Alves Batista</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">M. Ave</a> , et al. (463 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1407.3214v1-abstract-short" style="display: inline;"> We describe the method devised to reconstruct inclined cosmic-ray air showers with zenith angles greater than $60^\circ$ detected with the surface array of the Pierre Auger Observatory. The measured signals at the ground level are fitted to muon density distributions predicted with atmospheric cascade models to obtain the relative shower size as an overall normalization parameter. The method is ev… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.3214v1-abstract-full').style.display = 'inline'; document.getElementById('1407.3214v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1407.3214v1-abstract-full" style="display: none;"> We describe the method devised to reconstruct inclined cosmic-ray air showers with zenith angles greater than $60^\circ$ detected with the surface array of the Pierre Auger Observatory. The measured signals at the ground level are fitted to muon density distributions predicted with atmospheric cascade models to obtain the relative shower size as an overall normalization parameter. The method is evaluated using simulated showers to test its performance. The energy of the cosmic rays is calibrated using a sub-sample of events reconstructed with both the fluorescence and surface array techniques. The reconstruction method described here provides the basis of complementary analyses including an independent measurement of the energy spectrum of ultra-high energy cosmic rays using very inclined events collected by the Pierre Auger Observatory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.3214v1-abstract-full').style.display = 'none'; document.getElementById('1407.3214v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">27 pages, 19 figures, accepted for publication in Journal of Cosmology and Astroparticle Physics (JCAP)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1111.6645">arXiv:1111.6645</a> <span> [<a href="https://arxiv.org/pdf/1111.6645">pdf</a>, <a href="https://arxiv.org/ps/1111.6645">ps</a>, <a href="https://arxiv.org/format/1111.6645">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 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/10.1016/j.astropartphys.2011.08.001">10.1016/j.astropartphys.2011.08.001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray Showers detected by the Pierre Auger Observatory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allard%2C+D">D. Allard</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Anti%C4%8Di%C4%87%2C+T">T. Anti膷i膰</a>, <a href="/search/hep-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arganda%2C+E">E. Arganda</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">M. Ave</a>, <a href="/search/hep-ex?searchtype=author&query=Avenier%2C+M">M. Avenier</a> , et al. (473 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1111.6645v1-abstract-short" style="display: inline;"> In this paper we introduce the concept of Lateral Trigger Probability (LTP) function, i.e., the probability for an extensive air shower (EAS) to trigger an individual detector of a ground based array as a function of distance to the shower axis, taking into account energy, mass and direction of the primary cosmic ray. We apply this concept to the surface array of the Pierre Auger Observatory consi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.6645v1-abstract-full').style.display = 'inline'; document.getElementById('1111.6645v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.6645v1-abstract-full" style="display: none;"> In this paper we introduce the concept of Lateral Trigger Probability (LTP) function, i.e., the probability for an extensive air shower (EAS) to trigger an individual detector of a ground based array as a function of distance to the shower axis, taking into account energy, mass and direction of the primary cosmic ray. We apply this concept to the surface array of the Pierre Auger Observatory consisting of a 1.5 km spaced grid of about 1600 water Cherenkov stations. Using Monte Carlo simulations of ultra-high energy showers the LTP functions are derived for energies in the range between 10^{17} and 10^{19} eV and zenith angles up to 65 degs. A parametrization combining a step function with an exponential is found to reproduce them very well in the considered range of energies and zenith angles. The LTP functions can also be obtained from data using events simultaneously observed by the fluorescence and the surface detector of the Pierre Auger Observatory (hybrid events). We validate the Monte-Carlo results showing how LTP functions from data are in good agreement with simulations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.6645v1-abstract-full').style.display = 'none'; document.getElementById('1111.6645v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 8 figures. Published in Astroparticle Physics</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Astroparticle Physics 35 (2011) 266-276 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.4809">arXiv:1107.4809</a> <span> [<a href="https://arxiv.org/pdf/1107.4809">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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> <p class="title is-5 mathjax"> The Pierre Auger Observatory I: The Cosmic Ray Energy Spectrum and Related Measurements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allard%2C+D">D. Allard</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Anti%C4%8Di%C4%87%2C+T">T. Anti膷i膰</a>, <a href="/search/hep-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arganda%2C+E">E. Arganda</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">M. Ave</a>, <a href="/search/hep-ex?searchtype=author&query=Avenier%2C+M">M. Avenier</a> , et al. (471 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="1107.4809v1-abstract-short" style="display: inline;"> Studies of the cosmic ray energy spectrum at the highest energies with the Pierre Auger Observatory </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.4809v1-abstract-full" style="display: none;"> Studies of the cosmic ray energy spectrum at the highest energies with the Pierre Auger Observatory <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4809v1-abstract-full').style.display = 'none'; document.getElementById('1107.4809v1-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 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Contributions to the 32nd International Cosmic Ray Conference, Beijing, China, August 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.4807">arXiv:1107.4807</a> <span> [<a href="https://arxiv.org/pdf/1107.4807">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/375/1/052006">10.1088/1742-6596/375/1/052006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Pierre Auger Observatory V: Enhancements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allard%2C+D">D. Allard</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Anti%C4%8Di%C4%87%2C+T">T. Anti膷i膰</a>, <a href="/search/hep-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arganda%2C+E">E. Arganda</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">M. Ave</a>, <a href="/search/hep-ex?searchtype=author&query=Avenier%2C+M">M. Avenier</a> , et al. (471 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="1107.4807v1-abstract-short" style="display: inline;"> Ongoing and planned enhancements of the Pierre Auger Observatory </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.4807v1-abstract-full" style="display: none;"> Ongoing and planned enhancements of the Pierre Auger Observatory <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4807v1-abstract-full').style.display = 'none'; document.getElementById('1107.4807v1-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 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Contributions to 32nd International Cosmic Ray Conference, Beijing, China, August 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.4806">arXiv:1107.4806</a> <span> [<a href="https://arxiv.org/pdf/1107.4806">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</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> <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"> The Pierre Auger Observatory IV: Operation and Monitoring </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allard%2C+D">D. Allard</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Anti%C4%8Di%C4%87%2C+T">T. Anti膷i膰</a>, <a href="/search/hep-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arganda%2C+E">E. Arganda</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">M. Ave</a>, <a href="/search/hep-ex?searchtype=author&query=Avenier%2C+M">M. Avenier</a> , et al. (471 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="1107.4806v1-abstract-short" style="display: inline;"> Technical reports on operations and monitoring of the Pierre Auger Observatory </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.4806v1-abstract-full" style="display: none;"> Technical reports on operations and monitoring of the Pierre Auger Observatory <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4806v1-abstract-full').style.display = 'none'; document.getElementById('1107.4806v1-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 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Constributions to 32nd International Cosmic Ray Conference, Beijing, China, August 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.4805">arXiv:1107.4805</a> <span> [<a href="https://arxiv.org/pdf/1107.4805">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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> <p class="title is-5 mathjax"> The Pierre Auger Observatory III: Other Astrophysical Observations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allard%2C+D">D. Allard</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Anti%C4%8Di%C4%87%2C+T">T. Anti膷i膰</a>, <a href="/search/hep-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arganda%2C+E">E. Arganda</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">M. Ave</a>, <a href="/search/hep-ex?searchtype=author&query=Avenier%2C+M">M. Avenier</a> , et al. (471 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="1107.4805v1-abstract-short" style="display: inline;"> Astrophysical observations of ultra-high-energy cosmic rays with the Pierre Auger Observatory </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.4805v1-abstract-full" style="display: none;"> Astrophysical observations of ultra-high-energy cosmic rays with the Pierre Auger Observatory <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4805v1-abstract-full').style.display = 'none'; document.getElementById('1107.4805v1-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 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Contributions to the 32nd International Cosmic Ray Conference, Beijing, China, August 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.4804">arXiv:1107.4804</a> <span> [<a href="https://arxiv.org/pdf/1107.4804">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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> <p class="title is-5 mathjax"> The Pierre Auger Observatory II: Studies of Cosmic Ray Composition and Hadronic Interaction models </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Pierre+Auger+Collaboration"> The Pierre Auger Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abreu%2C+P">P. Abreu</a>, <a href="/search/hep-ex?searchtype=author&query=Aglietta%2C+M">M. Aglietta</a>, <a href="/search/hep-ex?searchtype=author&query=Ahn%2C+E+J">E. J. Ahn</a>, <a href="/search/hep-ex?searchtype=author&query=Albuquerque%2C+I+F+M">I. F. M. Albuquerque</a>, <a href="/search/hep-ex?searchtype=author&query=Allard%2C+D">D. Allard</a>, <a href="/search/hep-ex?searchtype=author&query=Allekotte%2C+I">I. Allekotte</a>, <a href="/search/hep-ex?searchtype=author&query=Allen%2C+J">J. Allen</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Castillo%2C+J+A">J. Alvarez Castillo</a>, <a href="/search/hep-ex?searchtype=author&query=Alvarez-Mu%C3%B1iz%2C+J">J. Alvarez-Mu帽iz</a>, <a href="/search/hep-ex?searchtype=author&query=Ambrosio%2C+M">M. Ambrosio</a>, <a href="/search/hep-ex?searchtype=author&query=Aminaei%2C+A">A. Aminaei</a>, <a href="/search/hep-ex?searchtype=author&query=Anchordoqui%2C+L">L. Anchordoqui</a>, <a href="/search/hep-ex?searchtype=author&query=Andringa%2C+S">S. Andringa</a>, <a href="/search/hep-ex?searchtype=author&query=Anti%C4%8Di%C4%87%2C+T">T. Anti膷i膰</a>, <a href="/search/hep-ex?searchtype=author&query=Anzalone%2C+A">A. Anzalone</a>, <a href="/search/hep-ex?searchtype=author&query=Aramo%2C+C">C. Aramo</a>, <a href="/search/hep-ex?searchtype=author&query=Arganda%2C+E">E. Arganda</a>, <a href="/search/hep-ex?searchtype=author&query=Arqueros%2C+F">F. Arqueros</a>, <a href="/search/hep-ex?searchtype=author&query=Asorey%2C+H">H. Asorey</a>, <a href="/search/hep-ex?searchtype=author&query=Assis%2C+P">P. Assis</a>, <a href="/search/hep-ex?searchtype=author&query=Aublin%2C+J">J. Aublin</a>, <a href="/search/hep-ex?searchtype=author&query=Ave%2C+M">M. Ave</a>, <a href="/search/hep-ex?searchtype=author&query=Avenier%2C+M">M. Avenier</a> , et al. (471 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="1107.4804v1-abstract-short" style="display: inline;"> Studies of the composition of the highest energy cosmic rays with the Pierre Auger Observatory, including examination of hadronic physics effects on the structure of extensive air showers. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.4804v1-abstract-full" style="display: none;"> Studies of the composition of the highest energy cosmic rays with the Pierre Auger Observatory, including examination of hadronic physics effects on the structure of extensive air showers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.4804v1-abstract-full').style.display = 'none'; document.getElementById('1107.4804v1-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 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Contributions to the 32nd International Cosmic Ray Conference, Beijing, China, August 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0812.1920">arXiv:0812.1920</a> <span> [<a href="https://arxiv.org/pdf/0812.1920">pdf</a>, <a href="https://arxiv.org/ps/0812.1920">ps</a>, <a href="https://arxiv.org/format/0812.1920">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Astrophysics">astro-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.astropartphys.2009.05.003">10.1016/j.astropartphys.2009.05.003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Antarctic Impulsive Transient Antenna Ultra-high Energy Neutrino Detector Design, Performance, and Sensitivity for 2006-2007 Balloon Flight </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=ANITA+collaboration"> ANITA collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Gorham%2C+P">P. Gorham</a>, <a href="/search/hep-ex?searchtype=author&query=Allison%2C+P">P. Allison</a>, <a href="/search/hep-ex?searchtype=author&query=Barwick%2C+S">S. Barwick</a>, <a href="/search/hep-ex?searchtype=author&query=Beatty%2C+J">J. Beatty</a>, <a href="/search/hep-ex?searchtype=author&query=Besson%2C+D">D. Besson</a>, <a href="/search/hep-ex?searchtype=author&query=Binns%2C+W">W. Binns</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+P">P. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Clem%2C+J">J. Clem</a>, <a href="/search/hep-ex?searchtype=author&query=Connolly%2C+A">A. Connolly</a>, <a href="/search/hep-ex?searchtype=author&query=Dowkontt%2C+P">P. Dowkontt</a>, <a href="/search/hep-ex?searchtype=author&query=DuVernois%2C+M">M. DuVernois</a>, <a href="/search/hep-ex?searchtype=author&query=Field%2C+R">R. Field</a>, <a href="/search/hep-ex?searchtype=author&query=Goldstein%2C+D">D. Goldstein</a>, <a href="/search/hep-ex?searchtype=author&query=Goodhue%2C+A">A. Goodhue</a>, <a href="/search/hep-ex?searchtype=author&query=Hast%2C+C">C. Hast</a>, <a href="/search/hep-ex?searchtype=author&query=Hebert%2C+C">C. Hebert</a>, <a href="/search/hep-ex?searchtype=author&query=Hoover%2C+S">S. Hoover</a>, <a href="/search/hep-ex?searchtype=author&query=Israel%2C+M">M. Israel</a>, <a href="/search/hep-ex?searchtype=author&query=Kowalski%2C+J">J. Kowalski</a>, <a href="/search/hep-ex?searchtype=author&query=Learned%2C+J">J. Learned</a>, <a href="/search/hep-ex?searchtype=author&query=Liewer%2C+K">K. Liewer</a>, <a href="/search/hep-ex?searchtype=author&query=Link%2C+J">J. Link</a>, <a href="/search/hep-ex?searchtype=author&query=Lusczek%2C+E">E. Lusczek</a> , et al. (18 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="0812.1920v1-abstract-short" style="display: inline;"> We present a detailed report on the experimental details of the Antarctic Impulsive Transient Antenna (ANITA) long duration balloon payload, including the design philosophy and realization, physics simulations, performance of the instrument during its first Antarctic flight completed in January of 2007, and expectations for the limiting neutrino detection sensitivity. Neutrino physics results wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0812.1920v1-abstract-full').style.display = 'inline'; document.getElementById('0812.1920v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0812.1920v1-abstract-full" style="display: none;"> We present a detailed report on the experimental details of the Antarctic Impulsive Transient Antenna (ANITA) long duration balloon payload, including the design philosophy and realization, physics simulations, performance of the instrument during its first Antarctic flight completed in January of 2007, and expectations for the limiting neutrino detection sensitivity. Neutrino physics results will be reported separately. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0812.1920v1-abstract-full').style.display = 'none'; document.getElementById('0812.1920v1-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 December, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2008. </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">50 pages, 49 figures, in preparation for PRD</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Astropart.Phys.32:10-41,2009 </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 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