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Search for pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at v root s=8 TeV
CMS Collaboration
2014
发表期刊PHYSICS LETTERS B
卷号739页码:229-249
通讯作者Khachatryan, V (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving tau leptons and bottom quarks is presented. The search uses events from a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.7 fb(-1), collected with the CMS detector at the LHC with root s = 8 TeV. The number of observed events is found to be in agreement with the expected standard model background. Third-generation scalar leptoquarks with masses below 740 GeV are excluded at 95% confidence level, assuming a 100% branching fraction for the leptoquark decay to a tau lepton and a bottom quark. In addition, this mass limit applies directly to top squarks decaying via an R-parity violating coupling. lambda(') (333). The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the Rparity violating coupling. lambda(')(3jk). Each top squark decays to a tau lepton, a bottom quark, and two light quarks. Top squarks in this model with masses below 580 GeV are excluded at 95% confidence level. The constraint on the leptoquark mass is the most stringent to date, and this is the first search for top squarks decaying via. lambda(')(3jk). (C) 2014 The Authors. Published by Elsevier B. V.
关键词SUPERSYMMETRY PHYSICS
学科领域Physics
DOI10.1016/j.physletb.2014.10.063
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000346002000036
引用统计
被引频次:51[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/311005/213829
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 pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at v root s=8 TeV[J]. PHYSICS LETTERS B,2014,739:229-249.
APA CMS Collaboration.(2014).Search for pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at v root s=8 TeV.PHYSICS LETTERS B,739,229-249.
MLA CMS Collaboration."Search for pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at v root s=8 TeV".PHYSICS LETTERS B 739(2014):229-249.
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