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Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s=13 TeV using the ATLAS experiment
http://hdl.handle.net/2241/00143452
http://hdl.handle.net/2241/0014345229f5c6e4-8dbd-4a62-a885-cc6ebf819194
名前 / ファイル | ライセンス | アクション |
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PRA_93-11-112015 (801.2 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2016-08-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Search for metastable heavy charged particles with large ionization energy loss in pp collisions at √s=13 TeV using the ATLAS experiment | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
ATLA Collaboration
× ATLA Collaboration× 原, 和彦× 金, 信弘× 大川, 英希× 佐藤, 構二× 受川, 史彦 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | This paper presents a search for massive charged long-lived particles produced in pp collisions at s√=13 TeV at the LHC using the ATLAS experiment. The data set used corresponds to an integrated luminosity of 3.2 fb^-1. Many extensions of the Standard Model predict the existence of massive charged long-lived particles, such as R-hadrons. These massive particles are expected to be produced with a velocity significantly below the speed of light, and therefore to have a specific ionization higher than any Standard Model particle of unit charge at high momenta. The Pixel subsystem of the ATLAS detector is used to measure the ionization energy loss of reconstructed charged particles and to search for such highly ionizing particles. The search presented here has much greater sensitivity than a similar search performed using the ATLAS detector in the s√=8 TeV data set, thanks to the increase in expected signal cross section due to the higher center-of-mass energy of collisions, to an upgraded detector with a new silicon layer close to the interaction point, and to analysis improvements. No significant deviation from Standard Model background expectations is observed, and lifetime-dependent upper limits on R-hadron production cross sections and masses are set. Gluino R-hadrons with lifetimes above 0.4 ns and decaying to qq ̄ plus a 100 GeV neutralino are excluded at the 95% confidence level, with lower mass limit ranging between 740 and 1590 GeV. In the case of stable R-hadrons the lower mass limit at the 95% confidence level is 1570 GeV. | |||||
言語 | en | |||||
書誌情報 |
en : Physical review D 巻 93, 号 11, p. 112015, 発行日 2016-06 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2470-0010 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00773624 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.93.112015 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | (c) 2016 CERN, for the ATLAS Collaboration | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society |