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Measurement of the production of a W boson in association with a charm quark in pp collisions at root s=7 TeV with the ATLAS detector
ATLAS Collaboration
2014
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号5页码:1-67
摘要The production of a W boson in association with a single charm quark is studied using 4.6 fb(-1) of pp collision data at root s = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96(-0.30)(+0.26) at Q (2) = 1.9 GeV2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio sigma(W (+) +)/sigma(W (-) + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-(s) over bar quark asymmetry.
关键词Electroweak interaction Hadron-Hadron Scattering Charm physics
学科领域Physics
DOI10.1007/JHEP05(2014)068
收录类别SCI
WOS记录号WOS:000336799600001
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被引频次:4[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/311005/225090
专题实验物理中心
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ATLAS Collaboration. Measurement of the production of a W boson in association with a charm quark in pp collisions at root s=7 TeV with the ATLAS detector[J]. JOURNAL OF HIGH ENERGY PHYSICS,2014(5):1-67.
APA ATLAS Collaboration.(2014).Measurement of the production of a W boson in association with a charm quark in pp collisions at root s=7 TeV with the ATLAS detector.JOURNAL OF HIGH ENERGY PHYSICS(5),1-67.
MLA ATLAS Collaboration."Measurement of the production of a W boson in association with a charm quark in pp collisions at root s=7 TeV with the ATLAS detector".JOURNAL OF HIGH ENERGY PHYSICS .5(2014):1-67.
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