Measurement of masses in the t(t)over-tilde system by kinematic endpoints in pp collisions at root s=7 TeV

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	Measurement of masses in the t(t)over-tilde system by kinematic endpoints in pp collisions at root s=7 TeV
	CMS Collaboration
刊名	EUROPEAN PHYSICAL JOURNAL C
	2013
卷号	73 期号:7
关键词	TOP-QUARK STANDARD MODEL HIGGS-BOSON POLE MASS PARTICLE
通讯作者	Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
英文摘要	A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for t (t) over bar events selected in the dilepton final state from a data sample corresponding to an integrated luminosity of 5.0 fb(-1) collected by the CMS experiment in pp collisions at root s = 7 TeV. The analysis is based on endpoint determinations in kinematic distributions. When the neutrino and W-boson masses are constrained to their world-average values, a top-quark mass value of M-t = 173.9 +/- 0.9 (stat.)=(+ 1.7)(-2.1) (syst.) GeV is obtained. When such constraints are not used, the three particle masses are obtained in a simultaneous fit. In this unconstrained mode the study serves as a test of mass determination methods that may be used in beyond standard model physics scenarios where several masses in a decay chain may be unknown and undetected particles lead to underconstrained kinematics.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000322575300019
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213575]
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. Measurement of masses in the t(t)over-tilde system by kinematic endpoints in pp collisions at root s=7 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2013,73(7).
APA	CMS Collaboration.(2013).Measurement of masses in the t(t)over-tilde system by kinematic endpoints in pp collisions at root s=7 TeV.EUROPEAN PHYSICAL JOURNAL C,73(7).
MLA	CMS Collaboration."Measurement of masses in the t(t)over-tilde system by kinematic endpoints in pp collisions at root s=7 TeV".EUROPEAN PHYSICAL JOURNAL C 73.7(2013).