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Study of W boson production in pPb collisions at sqrt(s[NN]) = 5.02 TeV

Abstract : The first study of W boson production in pPb collisions is presented, for bosons decaying to a muon or electron, and a neutrino. The measurements are based on a data sample corresponding to an integrated luminosity of 34.6 inverse nanobarns at a nucleon-nucleon centre-of-mass energy of sqrt(s[NN]) = 5.02 TeV, collected by the CMS experiment. The W boson differential cross sections, lepton charge asymmetry, and forward-backward asymmetries are measured for leptons of transverse momentum exceeding 25 GeV, and as a function of the lepton pseudorapidity in the abs(eta[lab]) < 2.4 range. Deviations from the expectations based on currently available parton distribution functions are observed, showing the need for including W boson data in nuclear parton distribution global fits.
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Submitted on : Monday, April 13, 2015 - 2:50:04 PM
Last modification on : Monday, December 13, 2021 - 9:15:24 AM

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V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Study of W boson production in pPb collisions at sqrt(s[NN]) = 5.02 TeV. Physics Letters B, Elsevier, 2015, 750, pp.565-586. ⟨10.1016/j.physletb.2015.09.057⟩. ⟨in2p3-01141662⟩



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