W and Z boson production in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV

The ALICE collaboration Adam, Jaroslav ; Adamova, Dagmar ; Aggarwal, Madan Mohan ; et al.
JHEP 1702 (2017) 077, 2017.
Inspire Record 1496634 DOI 10.17182/hepdata.77359

The W and Z boson production was measured via the muonic decay channel in proton-lead collisions at $ \sqrt{s_{\mathrm{NN}}}=5.02 $ TeV at the Large Hadron Collider with the ALICE detector. The measurement covers backward (−4.46 < y$_{cms}$ < −2.96) and forward (2.03 < y$_{cms}$ < 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$_{μμ}$ < 120 GeV/c$^{2}$ and muon transverse momentum (p$_{T}^{μ}$ ) larger than 20 GeV/c, is measured. The production cross section and charge asymmetry of muons from W-boson decays with p$_{T}^{μ}$ > 10 GeV/c are determined. The results are compared to theoretical calculations both 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.

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