Determination of the top-quark pole mass using t t ¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions

	Determination of the top-quark pole mass using t t ¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
	ATLAS Collaboration
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2015
卷号	2015 期号:10 页码:121
关键词	Hadron-Hadron Scattering Top physics
英文摘要	The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the t (t) over bar + 1-jet system. This distribution can be used for a precise determination of the top-quark mass since gluon radiation depends on the mass of the quarks. The experimental analysis is based on proton-proton collision data collected by the ATLAS detector at the LHC with a centre-of-mass energy of 7TeV corresponding to an integrated luminosity of 4.6 fb(-1). The selected events were identified using the lepton+jets top-quark-pair decay channel, where lepton refers to either an electron or a muon. The observed distribution is compared to a theoretical prediction at next-to-leading-order accuracy in quantum chromodynamics using the pole-mass scheme. With this method, the measured value of the top-quark pole mass, m(t)(pole), is: m(t)(pole) t = 173.7 +/- 1.5 (stat.) +/- 1.4 (syst.)(-0.5)(+1.0) (theory) GeV. This result represents the most precise measurement of the top-quark pole mass to date.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000363476900001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228973]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	ATLAS Collaboration. Determination of the top-quark pole mass using t t ¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions[J]. JOURNAL OF HIGH ENERGY PHYSICS,2015,2015(10):121.
APA	ATLAS Collaboration.(2015).Determination of the top-quark pole mass using t t ¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions.JOURNAL OF HIGH ENERGY PHYSICS,2015(10),121.
MLA	ATLAS Collaboration."Determination of the top-quark pole mass using t t ¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions".JOURNAL OF HIGH ENERGY PHYSICS 2015.10(2015):121.