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 sNN=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 |ηlab|<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.
Original language | English |
---|---|
Pages (from-to) | 565-586 |
Number of pages | 22 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 750 |
DOIs | |
Publication status | Published - 2015 Nov 12 |
Bibliographical note
Publisher Copyright:© 2015 CERN for the benefit of the CMS Collaboration
Keywords
- CMS
- W boson
- pPb collisions
ASJC Scopus subject areas
- Nuclear and High Energy Physics