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. [Figure not available: see fulltext.]

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., et al. (2021). Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2021(5) [10.1007/JHEP05(2021)182].

Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV

Xiao J.;Benaglia A.;Beschi A.;Brivio F.;Cetorelli F.;Ciriolo V.;De Guio F.;Dinardo M. E.;Ghezzi A.;Govoni P.;Guzzi L.;Malberti M.;Monti F.;Moroni L.;Paganoni M.;Ragazzi S.;Tabarelli de Fatis T.;Valsecchi D.;Zuolo D.;Ortona G.;Fiorendi S.;Massironi A.;Gerosa R.;Lucchini M. T.;
2021

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. [Figure not available: see fulltext.]
Articolo in rivista - Articolo scientifico
Hadron-Hadron scattering (experiments); Relativistic heavy ion physics;
English
2021
2021
5
182
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., et al. (2021). Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2021(5) [10.1007/JHEP05(2021)182].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/476060
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