Study of W boson production in pPb collisions at sqrt(s[NN]) = 5.02 TeV
(2015) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B750, p. 565-586 (2015)
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- 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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CMS, Basegmez, S., Beluffi, C., Bruno, G., Castello, R., Caudron, A., Ceard, L., Da Silveira, G. G., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Hollar, J., Jafari, A., Jez, P., Komm, M., Lemaitre, V., Nuttens, C., et al. (2015). Study of W boson production in pPb collisions at sqrt(s[NN]) = 5.02 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B750, 565-586. https://doi.org/10.1016/j.physletb.2015.09.057 (Original work published 2015)