Measurement of the angular coefficients in Z-boson events using electron and muon pairs from data taken at root s=8 TeV with the ATLAS detector
ATLAS Collaboration
刊名JOURNAL OF HIGH ENERGY PHYSICS
2016
期号8
关键词Hadron-Hadron scattering (experiments)
DOI10.1007/JHEP08(2016)159
文章类型Article
英文摘要The angular distributions of Drell-Yan charged lepton pairs in the vicinity of the Z-boson mass peak probe the underlying QCD dynamics of Z-boson production. This paper presents a measurement of the complete set of angular coefficients Lambda(0-7) describing these distributions in the Z-boson Collins-Soper frame. The data analysed correspond to 20.3 fb(-1) of pp collisions at root s = 8TeV, collected by the ATLAS detector at the CERN LHC. The measurements are compared to the most precise fixed-order calculations currently available (O (alpha(2)(s))) and with theoretical predictions embedded in Monte Carlo generators. The measurements are precise enough to probe QCD corrections beyond the formal accuracy of these calculations and to provide discrimination between different parton-shower models. A signi fi cant deviation from the O (alpha(2)(s)) predictions is observed for A(0)-A(2). Evidence is found for non-zero A(5,6, 7), consistent with expectations.
关键词[WOS]PARTON DISTRIBUTIONS ; HADRONIC COLLISIONS ; MONTE-CARLO ; CHARGE ASYMMETRY ; INTERFERENCE ; RESONANCE ; DECAY ; ORDER ; LHC
语种英语
WOS记录号WOS:000382978700001
引用统计
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/311005/260911
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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ATLAS Collaboration. Measurement of the angular coefficients in Z-boson events using electron and muon pairs from data taken at root s=8 TeV with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016(8).
APA ATLAS Collaboration.(2016).Measurement of the angular coefficients in Z-boson events using electron and muon pairs from data taken at root s=8 TeV with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS(8).
MLA ATLAS Collaboration."Measurement of the angular coefficients in Z-boson events using electron and muon pairs from data taken at root s=8 TeV with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS .8(2016).
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