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Measurement of the t(t)over-bar production cross section in the e mu channel in proton-proton collisions at root s=7 and 8 TeV
CMS Collaboration
2016
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
卷号2016期号:8页码:29
文章类型Article
摘要The inclusive cross section for top quark pair production is measured in proton-proton collisions at root s = 7 and 8TeV, corresponding to 5.0 and 19.7 fb(-1), respectively, with the CMS experiment at the LHC. The cross sections are measured in the electron-muon channel using a binned likelihood fit to multi-differential final state distributions related to identified b quark jets and other jets in the event. The measured cross section values are 173.6 +/- 2.1 (stat)(-4.0)(+ 4.5)(syst) +/- 3.8 (lumi) pb at root s = 7TeV, and 244.9 +/- 1.4(stat)(-5.5)(+6.3) (syst) +/- 6.4 (lumi) pb at root s = 8TeV, in good agreement with QCD calculations at next-to-nextto- leading-order accuracy. The ratio of the cross sections measured at 7 and 8TeV is determined, as well as cross sections in the fiducial regions defined by the acceptance requirements on the two charged leptons in the final state. The cross section results are used to determine the top quark pole mass via the dependence of the theoretically predicted cross section on the mass, giving a best result of 173.8(-1.8)(+1.7) GeV. The data at root s = 8TeV are also used to set limits, for two neutralino mass values, on the pair production of supersymmetric partners of the top quark with masses close to the top quark mass.
关键词Hadron-Hadron scattering (experiments) Top physics
DOI10.1007/jhep08(2016)029
关键词[WOS]PARTON DISTRIBUTIONS ; HADRON COLLIDERS ; LHC ; PHYSICS ; SUPERSYMMETRY ; SQUARK ; EVENT
语种英语
WOS记录号WOS:000391750900001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260759
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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CMS Collaboration. Measurement of the t(t)over-bar production cross section in the e mu channel in proton-proton collisions at root s=7 and 8 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016,2016(8):29.
APA CMS Collaboration.(2016).Measurement of the t(t)over-bar production cross section in the e mu channel in proton-proton collisions at root s=7 and 8 TeV.JOURNAL OF HIGH ENERGY PHYSICS,2016(8),29.
MLA CMS Collaboration."Measurement of the t(t)over-bar production cross section in the e mu channel in proton-proton collisions at root s=7 and 8 TeV".JOURNAL OF HIGH ENERGY PHYSICS 2016.8(2016):29.
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