Transverse-momentum dependence of the J/ψ nuclear modification in d+Au collisions at √sNN=200 GeV

Adare, A. and Afanasiev, S. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Al-Bataineh, H. and Alexander, J. and Angerami, A. and Aoki, K. and Apadula, N. and Aramaki, Y. and Atomssa, E. T. and Averbeck, R. and Awes, T. C. and Azmoun, B. and Babintsev, V. and Bai, M. and Baksay, G. and Baksay, L. and Barish, K. N. and Bassalleck, B. and Basye, A. T. and Bathe, S. and Baublis, V. and Baumann, C. and Bazilevsky, A. and Belikov, S. and Belmont, R. and Bennett, R. and Berdnikov, A. and Csörgő, Tamás and Csanád, Máté and Dávid, Gábor and Kiss, Ádám and Nagy, Márton and Sziklai, János István and Vértesi, Róbert (2013) Transverse-momentum dependence of the J/ψ nuclear modification in d+Au collisions at √sNN=200 GeV. PHYSICAL REVIEW C, 87 (3). ISSN 2469-9985

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Abstract

We present measured J/ψ production rates in d+Au collisions at √sN N = 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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