Observation of the Associated Production of a Single Top Quark - and a W Boson in pp Collisions at root s=8 TeV

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	Observation of the Associated Production of a Single Top Quark - and a W Boson in pp Collisions at root s=8 TeV
	CMS Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2014
卷号	112 期号:23
关键词	PRODUCTION CROSS-SECTION DETECTOR PHYSICS ATLAS LHC
通讯作者	Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	The first observation of the associated production of a single top quark and a W boson is presented. The analysis is based on a data set corresponding to an integrated luminosity of 12.2 fb(-1) of proton-proton collisions at root s = 8 TeV recorded by the CMS experiment at the LHC. Events with two leptons and a jet originating from a b quark are selected. A multivariate analysis based on kinematic and topological properties is used to separate the signal from the dominant (tt) over bar background. An excess consistent with the signal hypothesis is observed, with a significance which corresponds to 6.1 standard deviations above a background-only hypothesis. The measured production cross section is 23.4 +/- 5.4 pb, in agreement with the standard model prediction.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000336981200003
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213719]
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. Observation of the Associated Production of a Single Top Quark - and a W Boson in pp Collisions at root s=8 TeV[J]. PHYSICAL REVIEW LETTERS,2014,112(23).
APA	CMS Collaboration.(2014).Observation of the Associated Production of a Single Top Quark - and a W Boson in pp Collisions at root s=8 TeV.PHYSICAL REVIEW LETTERS,112(23).
MLA	CMS Collaboration."Observation of the Associated Production of a Single Top Quark - and a W Boson in pp Collisions at root s=8 TeV".PHYSICAL REVIEW LETTERS 112.23(2014).