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

J. Adam, D. Adamová, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S. Ahmad, S.U. Ahn, S. Aiola, …
Journal of High Energy Physics, 卷.2017(2), 77
02/2017

摘要

Heavy Ion Experiments Nuclear and High Energy Physics
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 < y <sub>cms</sub> < −2.96) and forward (2.03 < y <sub>cms</sub> < 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 <sub>μμ</sub> < 120 GeV/c <sup>2</sup> and muon transverse momentum (p <sub>T</sub> <sup>μ</sup> ) larger than 20 GeV/c, is measured. The production cross section and charge asymmetry of muons from W-boson decays with p <sub>T</sub> <sup>μ</sup> > 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.[Figure not available: see fulltext.]

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https://doi.org/10.1007/JHEP02(2017)077檢視
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