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Transverse-Momentum Dependence of the J/psi Nuclear Modification in d+ Au Collisions at sqrt (s_NN)= 200 GeV

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/20524

Transverse-Momentum Dependence of the J/psi Nuclear Modification in d+ Au Collisions at sqrt (s_NN)= 200 GeV

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Title: Transverse-Momentum Dependence of the J/psi Nuclear Modification in d+ Au Collisions at sqrt (s_NN)= 200 GeV
Author: Fields, Douglas E.; PHENIX Collaboration; Brooks, M.L.; Butsyk, S.; Grim, G.; Jiang, X.; Kapustinsky, J.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, H.; Liu, M.X.; McGaughey, P.L.; Sondheim, W.E.; Van Hecke, H.W.; Bassalleck, B.; Malik, M.D.; Thomas, T.L.; Younus, I.; Al-Bataineh, H.; Dharmawardane, K.V.; Kyle, G.S.; Papavassiliou, V.; Pate, S.F.; Wang, X.R.
Abstract: We present measured J/ψ production rates in d+Au collisions at √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.
Date: 2012-05-10
Description: Preprint
URI: http://hdl.handle.net/1928/20524

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