Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV

doi:10.1007/JHEP08(2018)011

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	Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV
	CMS Collaboration
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2018
期号	8 页码:11
关键词	Hadron-Hadron scattering (experiments) Top physics
ISSN号	1029-8479
DOI	10.1007/JHEP08(2018)011
文献子类	Article
英文摘要	A measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb(-1), collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three-and four-lepton final states. The production cross sections are measured to be sigma(t (t) over barW) = 0.77(-0.11)(+0.12)(stat)(-0.12)(+0.13) pb and sigma(t (t) over barZ) = 0.99(-0.08)(+0.09) (stat)(-0.10)(+0.12) (syst) pb. The expected (observed) signal signi fi cance for the sigma(t (t) over barW production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the t (t) over barZ production in three- and four-lepton channels both the expected and the observed signi fi cances are found to be in excess of 5 standard deviations. The results are in agreement with the standard model predictions and are used to constrain the Wilson coe ffi cients for eight dimension-six operators describing new interactions that would modify t (t) over barW and t (t) over barZ production.
WOS关键词	COUPLINGS
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000440833700003
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286188]
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 the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2018(8):11.
APA	CMS Collaboration.(2018).Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV.JOURNAL OF HIGH ENERGY PHYSICS(8),11.
MLA	CMS Collaboration."Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV".JOURNAL OF HIGH ENERGY PHYSICS .8(2018):11.