Journal
PHYSICS LETTERS B
Volume 678, Issue 1, Pages 72-76Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2009.06.006
Keywords
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Funding
- NSFC [10735040]
- 973-project [2007CB815000]
- US Department of Energy [DE-AC03-76SF00098]
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The transverse momentum (p(t)) dependence of J/psi production in heavy ion collisions is investigated in a transport model with both initial production and continuous regeneration of charmonia. The competition between the two production mechanisms results in a pt suppression in central collisions, the gluon multi-scattering in the initial stage leads to a high p, enhancement, and the regeneration populates J/psi s at low p, region and induces a minimum in R-AA(p(t)). These three phenomena are indeed observed in both 200 GeV Cu + Cu and Au + Au collisions at RHIC energy. (C) 2009 Elsevier B.V. All rights reserved.
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