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Measurement of the t(t)over-barW and t(t)over-barZ production cross sections in pp collisions at root s=8 TeV with the ATLAS detector
ATLAS Collaboration
2015
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
卷号2015期号:11页码:172
摘要The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at root s = 8 TeV. The dataset corresponds to an integrated luminosity of 20.3 fb(-1) collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the t (t) over barW and t (t) over barZ processes simultaneously yields a significance of 5.0 sigma (4.2 sigma) over the background-only hypothesis for t (t) over barW (t (t) over barZ) production. The measured cross sections are sigma(t (t) over barW) = 369(-91)(+100) fb and sigma(t (t) over barZ) = 176(-52)(+58) fb. The background-only hypothesis with neither t (t) over barW nor t (t) over barZ production is excluded at 7.1 sigma. All measurements are consistent with next-to-leading-order calculations for the t (t) over barW and t (t) over barZ processes.
文章类型Article
关键词Electroweak interaction Hadron-Hadron scattering Top physics
学科领域Physics
DOI10.1007/JHEP11(2015)172
收录类别SCI
WOS类目Physics, Particles & Fields
WOS记录号WOS:000366139900001
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/229086
专题实验物理中心
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ATLAS Collaboration. Measurement of the t(t)over-barW and t(t)over-barZ production cross sections in pp collisions at root s=8 TeV with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2015,2015(11):172.
APA ATLAS Collaboration.(2015).Measurement of the t(t)over-barW and t(t)over-barZ production cross sections in pp collisions at root s=8 TeV with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS,2015(11),172.
MLA ATLAS Collaboration."Measurement of the t(t)over-barW and t(t)over-barZ production cross sections in pp collisions at root s=8 TeV with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS 2015.11(2015):172.
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