Abstract
We have carried out a wide study of shadowing and antishadowing effects on J/ψ production in dAu collisions at \({\sqrt{s_{N N}} = 200}\) GeV. We have studied the effects of three different gluon nPDF sets, using the exact kinematics for a 2 → 2 process, namely g + g → J/ψ + g as expected from LO pQCD. We have computed the rapidity dependence of R CP and R dAu for the different centrality classes of the PHENIX data. For mid rapidities, we have also computed the transverse-momentum dependence of the nuclear modification factor, which cannot be predicted with the usual 2 → 1 simplified kinematics. All these observables have been compared to the PHENIX data in dAu collisions.
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Ferreiro, E.G., Fleuret, F., Lansberg, J.P. et al. Centrality, Rapidity, and Transverse-Momentum Dependence of Gluon Shadowing and Antishadowing on J/ψ Production in dAu Collisions at \({\sqrt{s} = 200}\) GeV. Few-Body Syst 53, 27–36 (2012). https://doi.org/10.1007/s00601-012-0310-9
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DOI: https://doi.org/10.1007/s00601-012-0310-9