Search for anomalous production of events with three or more leptons in pp collisions at root s=8 TeV

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	Search for anomalous production of events with three or more leptons in pp collisions at root s=8 TeV
	CMS Collaboration
刊名	PHYSICAL REVIEW D
	2014
卷号	90 期号:3
关键词	PARTICLE PHYSICS STANDARD MODEL SUPERSYMMETRY SQUARK LHC STATES HIGGS BOSON
通讯作者	Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	A search for physics beyond the standard model in events with at least three leptons is presented. The data sample, corresponding to an integrated luminosity of 19.5 fb(-1) of proton-proton collisions with center-of-mass energy root s = 8 TeV, was collected by the CMS experiment at the LHC during 2012. The data are divided into exclusive categories based on the number of leptons and their flavor, the presence or absence of an opposite-sign, same-flavor lepton pair (OSSF), the invariant mass of the OSSF pair, the presence or absence of a tagged bottom-quark jet, the number of identified hadronically decaying tau leptons, and the magnitude of the missing transverse energy and of the scalar sum of jet transverse momenta. The numbers of observed events are found to be consistent with the expected numbers from standard model processes, and limits are placed on new-physics scenarios that yield multilepton final states. In particular, scenarios that predict Higgs boson production in the context of supersymmetric decay chains are examined. We also place a 95% confidence level upper limit of 1.3% on the branching fraction for the decay of a top quark to a charm quark and a Higgs boson (t -> cH), which translates to a bound on the left-and right-handed top-charm flavor-violating Higgs Yukawa couplings, lambda(H)(tc) and lambda(H)(ct), respectively, of root vertical bar lambda(H)(tc)vertical bar(2)+ vertical bar lambda(H)(tc)vertical bar(2) < 0.21.
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:000355488100001
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213864]
专题	高能物理研究所_粒子天体物理中心
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	CMS Collaboration. Search for anomalous production of events with three or more leptons in pp collisions at root s=8 TeV[J]. PHYSICAL REVIEW D,2014,90(3).
APA	CMS Collaboration.(2014).Search for anomalous production of events with three or more leptons in pp collisions at root s=8 TeV.PHYSICAL REVIEW D,90(3).
MLA	CMS Collaboration."Search for anomalous production of events with three or more leptons in pp collisions at root s=8 TeV".PHYSICAL REVIEW D 90.3(2014).