1201.5574 (E. G. Ferreiro et al.)

Centrality, rapidity, and transverse-momentum dependence of gluon
shadowing and antishadowing on $J/ψ$ production in $d$Au collisions at
$\sqrt{s}$=200 GeV    [PDF]

E. G. Ferreiro, F. Fleuret, J. -P. Lansberg, N. Matagne, A. Rakotozafindrabe

We have carried out a wide study of shadowing and antishadowing effects on
\jpsi\ production in \dAu\ collisions at $\sqrt{s_{NN}}=200$ GeV. We have
studied the effects of three different gluon nPDF sets, using the exact
kinematics for a $2\to 2$ process, namely $g+g\to J/\psi+g$ as expected from LO
pQCD. We have computed the rapidity dependence of \RCP\ and $R_{d\rm Au}$ 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 $2\to 1$
simplified kinematics. All these observables have been compared to the PHENIX
data in \dAu\ collisions.

View original: http://arxiv.org/abs/1201.5574