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<p class="title is-5 mathjax"> Annihilation of low energy antiprotons in silicon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&amp;query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&amp;query=Ahl%C3%A9n%2C+O">O. Ahl茅n</a>, <a href="/search/physics?searchtype=author&amp;query=Belov%2C+A+S">A. S. Belov</a>, <a href="/search/physics?searchtype=author&amp;query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&amp;query=Br%C3%A4unig%2C+P">P. Br盲unig</a>, <a href="/search/physics?searchtype=author&amp;query=Bremer%2C+J">J. Bremer</a>, <a href="/search/physics?searchtype=author&amp;query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&amp;query=Burghart%2C+G">G. Burghart</a>, <a href="/search/physics?searchtype=author&amp;query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&amp;query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&amp;query=Canali%2C+C">C. Canali</a>, <a href="/search/physics?searchtype=author&amp;query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&amp;query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&amp;query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&amp;query=Cialdi%2C+S">S. Cialdi</a>, <a href="/search/physics?searchtype=author&amp;query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&amp;query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&amp;query=Derking%2C+J+H">J. H. Derking</a>, <a href="/search/physics?searchtype=author&amp;query=Di+Domizio%2C+S">S. Di Domizio</a>, <a href="/search/physics?searchtype=author&amp;query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&amp;query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&amp;query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&amp;query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&amp;query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&amp;query=Genova%2C+P">P. Genova</a> , et al. (34 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="1311.4982v2-abstract-short" style="display: inline;"> The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth&#39;s gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straig&hellip; <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.4982v2-abstract-full').style.display = 'inline'; document.getElementById('1311.4982v2-abstract-short').style.display = 'none';">&#9661; More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.4982v2-abstract-full" style="display: none;"> The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth&#39;s gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straight path. The final position of the falling antihydrogen will be detected by a position sensitive detector. This detector will consist of an active silicon part, where the annihilations take place, followed by an emulsion part. Together, they allow to achieve 1$%$ precision on the measurement of $\bar{g}$ with about 600 reconstructed and time tagged annihilations. We present here, to the best of our knowledge, the first direct measurement of antiproton annihilation in a segmented silicon sensor, the first step towards designing a position sensitive silicon detector for the AE$\mathrm{\bar{g}}$IS experiment. We also present a first comparison with Monte Carlo simulations (GEANT4) for antiproton energies below 5 MeV <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.4982v2-abstract-full').style.display = 'none'; document.getElementById('1311.4982v2-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 March, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages in total, 29 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1306.5602">arXiv:1306.5602</a> <span>&nbsp;[<a href="https://arxiv.org/pdf/1306.5602">pdf</a>, <a href="https://arxiv.org/format/1306.5602">other</a>]&nbsp;</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/10.1088/1748-0221/8/08/P08013">10.1088/1748-0221/8/08/P08013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&amp;query=AEgIS+Collaboration"> AEgIS Collaboration</a>, <a href="/search/physics?searchtype=author&amp;query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&amp;query=Ahl%C3%A9n%2C+O">O. Ahl茅n</a>, <a href="/search/physics?searchtype=author&amp;query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&amp;query=Ariga%2C+A">A. Ariga</a>, <a href="/search/physics?searchtype=author&amp;query=Ariga%2C+T">T. Ariga</a>, <a href="/search/physics?searchtype=author&amp;query=Belov%2C+A+S">A. S. Belov</a>, <a href="/search/physics?searchtype=author&amp;query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&amp;query=Br%C3%A4unig%2C+P">P. Br盲unig</a>, <a href="/search/physics?searchtype=author&amp;query=Bremer%2C+J">J. Bremer</a>, <a href="/search/physics?searchtype=author&amp;query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&amp;query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&amp;query=Canali%2C+C">C. Canali</a>, <a href="/search/physics?searchtype=author&amp;query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&amp;query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&amp;query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&amp;query=Cialdi%2C+S">S. Cialdi</a>, <a href="/search/physics?searchtype=author&amp;query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&amp;query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&amp;query=Derking%2C+J+H">J. H. Derking</a>, <a href="/search/physics?searchtype=author&amp;query=Di+Domizio%2C+S">S. Di Domizio</a>, <a href="/search/physics?searchtype=author&amp;query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&amp;query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&amp;query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&amp;query=Ereditato%2C+A">A. Ereditato</a> , et al. (46 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="1306.5602v1-abstract-short" style="display: inline;"> The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir茅 deflectometer. The goal is to determine the gravitational acceleration g for antihydrogen with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon micro-strip detector to measure the&hellip; <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5602v1-abstract-full').style.display = 'inline'; document.getElementById('1306.5602v1-abstract-short').style.display = 'none';">&#9661; More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1306.5602v1-abstract-full" style="display: none;"> The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir茅 deflectometer. The goal is to determine the gravitational acceleration g for antihydrogen with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon micro-strip detector to measure the time of flight. Nuclear emulsions can measure the annihilation vertex of antihydrogen atoms with a precision of about 1 - 2 microns r.m.s. We present here results for emulsion detectors operated in vacuum using low energy antiprotons from the CERN antiproton decelerator. We compare with Monte Carlo simulations, and discuss the impact on the AEgIS project. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5602v1-abstract-full').style.display = 'none'; document.getElementById('1306.5602v1-abstract-short').style.display = 'inline';">&#9651; Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 June, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 16 figures, 3 tables</span> </p> </li> </ol> <div class="is-hidden-tablet"> <!-- feedback for mobile only --> <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>&nbsp;&nbsp;</span> </div> </div> </main> 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