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Search for baryon number violation in top-quark decays
CMS Collaboration
2014
发表期刊PHYSICS LETTERS B
卷号731页码:173-196
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at root s = 8 TeV. The top-quark decay considered in this search results in one light lepton (muon or electron), two jets, but no neutrino in the final state. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.5 fb(-1). The event selection is optimized for top quarks produced in pairs, with one undergoing the BNV decay and the other the standard model hadronic decay to three jets. No significant excess of events over the expected yield from standard model processes is observed. The upper limits at 95% confidence level on the branching fraction of the BNV top-quark decay are calculated to be 0.0016 and 0.0017 for the muon and the electron channels, respectively. Assuming lepton universality, an upper limit of 0.0015 results from the combination of the two channels. These limits are the first that have been obtained on a BNV process involving the top quark. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
关键词PARTON DISTRIBUTIONS LEPTON LHC MODEL
学科领域Physics
DOI10.1016/j.physletb.2014.02.033
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000334094500030
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213686
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Search for baryon number violation in top-quark decays[J]. PHYSICS LETTERS B,2014,731:173-196.
APA CMS Collaboration.(2014).Search for baryon number violation in top-quark decays.PHYSICS LETTERS B,731,173-196.
MLA CMS Collaboration."Search for baryon number violation in top-quark decays".PHYSICS LETTERS B 731(2014):173-196.
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