Transverse-Momentum Dependence of the J/psi Nuclear Modification in d+Au Collisions at sqrt(sNN)=200 GeV
Abstract
We present measured J/psi production rates in d+Au collisions at sqrt(sNN) = 200 GeV over a broad range of transverse momentum (pT=0-14 GeV/c) and rapidity (-2.2<y<2.2). We construct the nuclear-modification factor RdAu for these kinematics and as a function of collision centrality (related to impact parameter for the RdAu collision). We find that the modification is largest for collisions with small impact parameters, and observe a suppression (RdAu<1) for pT<4 GeV/c at positive rapidities. At negative rapidity we observe a suppression for pT<2 GeV/c then an enhancement (RdAu>1) for pT>2 GeV/c. The observed enhancement at negative rapidity has implications for the observed modification in heavy-ion collisions at high pT.
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