Abstract

A charmonium produced in heavy ion collisions at RHIC and LHC propagates through a dense co-moving matter with a rather high relative momentum, < P-T(2)> = 4-10 GeV2. In spite of Debye screening of the binding potential, the charmonium survives with a substantial probability, even if the (c) over barc potential is completely screened in the hot environment. In addition, the color-exchange interaction with the medium is another important source of charmonium suppression. Attenuation in a hot medium caused by both effects is evaluated by means of the path integral technique, which requires ability of boosting the binding potential to a moving reference frame. This problem is solved in the approximation of small intrinsic velocities of the charmed quarks. (C) 2014 Elsevier B.V. All rights reserved.