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Title
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Study of Z production in PbPb and pp collisions 2.76 TeV in the dimuon and dielectron decay channels
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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Journal of high energy physics. - Bristol
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Publication
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Bristol
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2015
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ISSN
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1126-6708
1029-8479
[online]
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DOI
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10.1007/JHEP03(2015)022
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Volume/pages
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3
(2015)
, 40 p.
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Article Reference
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022
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ISI
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000351363800005
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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