Study of Drell-Yan dimuon production in proton-lead collisions at s NN $$ \sqrt{s_{\mathrm{NN}}} $$ = 8.16 TeV
Name
13130_2021_Article_15745.pdf
Size
848.91 KB
Format
Adobe PDF
Checksum (MD5)
6371209cabe47cc49f9af2f70ded22a5
Author(s)
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Bergauer, T.
Dragicevic, M.
Erö, J.
Escalante Del Valle, A.
Frühwirth, R.
Jeitler, M.
Date Issued
May 20, 2021
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2021 May 20;2021(5):182
Version
Final published version
Abstract
Abstract
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 pT and of a geometric variable ϕ* are measured, where ϕ* highly correlates with pT 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP05(2021)182
