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Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels
CMS Collaboration
2015
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
卷号2015期号:3页码:22
文章类型Article
摘要The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at root s(NN) = 2.76TeV, using data collected by the CMS experiment at the LHC. The PbPb data sample corresponds to an integrated luminosity of about 166 mu b(-1), while the pp data sample collected in 2013 at the same nucleon-nucleon centre-of-mass energy has an integrated luminosity of 5.4 pb(-1). The Z boson yield is measured as a function of rapidity, transverse momentum, and collision centrality. The ratio of PbPb to pp yields, scaled by the number of inelastic nucleon-nucleon collisions, is found to be 1.06 +/- 0.05 (stat) +/- 0.08 (syst) in the dimuon channel and 1.02 +/- 0.08 (stat) +/- 0.15 (syst) in the dielectron channel, for centrality-integrated Z boson production. This binary collision scaling is seen to hold in the entire kinematic region studied, as expected for a colourless probe that is unaffected by the hot and dense QCD medium produced in heavy ion collisions.
关键词Particle and resonance production Heavy Ions Heavy-ion collision proton-proton scattering
学科领域Physics
DOI10.1007/JHEP03(2015)022
收录类别SCI
WOS类目Physics, Particles & Fields
WOS记录号WOS:000351363800005
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被引频次:21[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/311005/228239
专题粒子天体物理中心
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CMS Collaboration. Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels[J]. JOURNAL OF HIGH ENERGY PHYSICS,2015,2015(3):22.
APA CMS Collaboration.(2015).Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels.JOURNAL OF HIGH ENERGY PHYSICS,2015(3),22.
MLA CMS Collaboration."Study of Z production in PbPb and pp collisions at root s(NN)=2.76 TeV in the dimuon and dielectron decay channels".JOURNAL OF HIGH ENERGY PHYSICS 2015.3(2015):22.
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