Title
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Study of Drell-Yan dimuon production in proton-lead collisions at root s(NN )=8.16 TeV
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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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Differential cross sections for the Drell-Yan process, including Z boson production, using the dimuon decay channel are measured in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of 8.16 TeV. A data sample recorded with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 173 nb(-1). The differential cross section as a function of the dimuon mass is measured in the range 15-600 GeV, for the first time in proton-nucleus collisions. It is also reported as a function of dimuon rapidity over the mass ranges 15-60 GeV and 60-120 GeV, and ratios for the p-going over the Pb-going beam directions are built. In both mass ranges, the differential cross sections as functions of the dimuon transverse momentum p(T), and of a geometric variable phi* are measured, where phi* highly correlates with p(T), but is determined with higher precision. In the Z mass region, the rapidity dependence of the data indicate a modification of the distribution of partons within a lead nucleus as compared to the proton case. The data are more precise than predictions based upon current models of parton distributions. |
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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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2021
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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/JHEP05(2021)182
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Volume/pages
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5
(2021)
, 47 p.
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Article Reference
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182
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ISI
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000655672400001
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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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