Search for long-lived stopped R-hadrons decaying out of time with pp collisions using the ATLAS detector
文献类型：期刊论文
| 作者 | ATLAS collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2013 |
| 卷号 | 88期号:11 |
| 关键词 | DYNAMICAL SUPERSYMMETRY BREAKING SUPERGAUGE TRANSFORMATIONS PARTICLES MODEL SIMULATION EXTENSION COLLIDERS CURRENTS SQUARK WEAK |
| 通讯作者 | Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany. |
| 英文摘要 | An updated search is performed for gluino, top squark, or bottom squark R-hadrons that have come to rest within the ATLAS calorimeter, and decay at some later time to hadronic jets and a neutralino, using 5.0 and 22.9 fb(-1) of pp collisions at 7 and 8 TeV, respectively. Candidate decay events are triggered in selected empty bunch crossings of the LHC in order to remove pp collision backgrounds. Selections based on jet shape and muon system activity are applied to discriminate signal events from cosmic ray and beam-halo muon backgrounds. In the absence of an excess of events, improved limits are set on gluino, stop, and sbottom masses for different decays, lifetimes, and neutralino masses. With a neutralino of mass 100 GeV, the analysis excludes gluinos with mass below 832 GeV (with an expected lower limit of 731 GeV), for a gluino lifetime between 10 mu s and 1000 s in the generic R-hadron model with equal branching ratios for decays to q (q) over bar(chi) over tilde (0) and g (chi) over tilde (0). Under the same assumptions for the neutralino mass and squark lifetime, top squarks and bottom squarks in the Regge R-hadron model are excluded with masses below 379 and 344 GeV, respectively. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000328601900002 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213640]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | ATLAS collaboration. Search for long-lived stopped R-hadrons decaying out of time with pp collisions using the ATLAS detector[J]. PHYSICAL REVIEW D,2013,88(11). |
| APA | ATLAS collaboration.(2013).Search for long-lived stopped R-hadrons decaying out of time with pp collisions using the ATLAS detector.PHYSICAL REVIEW D,88(11). |
| MLA | ATLAS collaboration."Search for long-lived stopped R-hadrons decaying out of time with pp collisions using the ATLAS detector".PHYSICAL REVIEW D 88.11(2013). |
入库方式： OAI收割
来源：高能物理研究所
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