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., ...Daha Fazla

PHYSICS LETTERS B, cilt.750, ss.565-586, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 750
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.physletb.2015.09.057
  • Dergi Adı: PHYSICS LETTERS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.565-586
  • Anahtar Kelimeler: CMS, W boson, pPb collisions, PARTON
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.