Theoretical Review of Charmonium Production with Different p_T in the Hot Medium

¹ Department of Physics, Tianjin University, Tianjin 300350, China
² Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, D-60438 Frankfurt am Main, Germany

^* e-mail: baoyi.chen@tju.edu.cn
^** e-mail: carsten.greiner@th.physik.uni-frankfurt.de

Published online: 13 March 2019

Abstract

Charmonia with different transverse momentum p_T usually comes from different mechanisms in the relativistic heavy ion collisions. This work tries to review the theoretical studies on quarkonium evolutions in the deconfined medium produced in p-Pb and Pb-Pb collisions. The charmonia with high p_T are mainly from the initial hadronic collisions, and therefore sensitive to the initial energy density of the bulk medium. For those charmonia within 0.1 < p_T < 5 GeV/c at the energies of Large Hadron Collisions (LHC), They are mainly produced by the recombination of charm and anti-charm quarks in the medium. In the extremely low p_T ∼ 1/R_A (R_A is the nuclear radius), additional contribution from the coherent interactions between electromagnetic fields generated by one nucleus and the target nucleus plays a non-negligible role in the J/ψ production even in semi-central Pb-Pb collisions.