Charmonium in a hot medium: melting vs absorption
arXiv:1407.8080 · doi:10.1016/j.nuclphysa.2014.08.043
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>=4-10GeV^2. In spite of Debye screening of the binding potential, the charmonium survives with a substantial probability, even if the c-cbar 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.
arXiv comment4 pages, 4 figures. A talk given by BZK at Quark Matter 2014, Darmstadt, May 19-24
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