W and Z boson production in p-Pb collisions at √sNN=5.02 TeV

J. Adam, D. Alexandre, H. A. Andrews, David Evans, Katie Graham, Peter Jones, Anton Jusko, Marian Krivda, Roman Lietava, Orlando Villalobos Baillie, Nima Zardoshti, ALICE Collaboration

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Abstract

The W and Z boson production was measured via the muonic decay channelin proton-lead collisions at √sNN = 5.02 TeV at the Large Hadron Collider with the ALICE detector. The measurement covers backward (−4.46 < ycms < −2.96) and forward (2.03 < ycms < 3.53) rapidity regions, corresponding to Pb-going and p-going directions, respectively. The Z-boson production cross section, with dimuon invariant mass of 60 < mµµ < 120 GeV/c2 and muon transverse momentum (pµT) larger than 20 GeV/c, is measured. The production cross section and charge asymmetry of muons from W-boson decays with pµT > 10 GeV/c are determined. The results are compared to theoretical calculationsboth with and without including the nuclear modification of the parton distribution functions. The W-boson production is also studied as a function of the collision centrality: the cross section of muons from W-boson decays is found to scale with the average number of binary nucleon-nucleon collisions within uncertainties.
Original languageEnglish
Article number77
Number of pages27
JournalJournal of High Energy Physics
Volume2017
Issue number2
Early online date15 Feb 2017
DOIs
Publication statusE-pub ahead of print - 15 Feb 2017

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