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Few-Body Systems 53 (2012) 27-36
Centrality, Rapidity, and Transverse-Momentum Dependence of Gluon Shadowing and Antishadowing on J/ψ Production in dAu Collisions at Ös = 200s=200 GeV
E.G. Ferreiro, F. Fleuret1, J. P. Lansberg2, N. Matagne, A. Rakotozafindrabe3

We have carried out a wide study of shadowing and antishadowing effects on J/ψ production in dAu collisions at Ö{sN N} = 200sNN=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.
1 :  LLR - Laboratoire Leprince-Ringuet
2 :  IPNO - Institut de Physique Nucléaire d'Orsay
3 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
Physique/Physique Nucléaire Théorique