W and Z boson production in p-Pb collisions at √sNN = 5.02 TeV
Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Nazeer; Ahn, Sang Un; Alme, Johan; Altinpinar, Sedat; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Lønne, Per-Ivar; Mahmood, Sohail Musa; Milosevic, Jovan; Nystrand, Joakim; Qvigstad, Henrik; Rehman, Attiq ur; Richter, Matthias; Røed, Ketil; Røhrich, Dieter; Tveter, Trine Spedstad; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Wikne, Jon Christopher; Zhang, Hui; Zhao, Chengxin; Zhou, Zhuo; Zhu, Hongsheng; Langøy, Rune; Lien, Jørgen; Aiola, Salvatore; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Allesandro, B.; Alexandre, Didier; Alfaro Molina, José Rubén; Alici, Andrea; Alkin, Anton; ALICE, Collaboration
Journal article, Peer reviewed
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Original versionJournal of High Energy Physics (JHEP). 2017, 77, 1-26. 10.1007/JHEP02(2017)077
The W and Z boson production was measured via the muonic decay channel in 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 < m pp < 120 GeV/c2 and muon transverse momentum (pT) larger than 20 GeV/c, is measured. The production cross section and charge asymmetry of muons from W-boson decays with p_T > 10 GeV/c are determined. The results are compared to theoretical calculations both with and without including the nuclear modi_cation 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.