Study of W boson production in pPb collisions at root(NN)-N-S=5.02 TeV


Adam W., Bergauer T., Dragicevic M., Eroe J., Friedl M., Fruehwirth R., ...More

PHYSICS LETTERS B, vol.750, pp.565-586, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 750
  • Publication Date: 2015
  • Doi Number: 10.1016/j.physletb.2015.09.057
  • Title of Journal : PHYSICS LETTERS B
  • Page Numbers: pp.565-586
  • Keywords: CMS, W boson, pPb collisions, PARTON

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 nb(-1) at a nucleon-nucleon centre-of-mass energy of root(NN)-N-S = 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/c, and as a function of the lepton pseudorapidity in the vertical bar eta(lab)vertical bar < 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. (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.