Electromagnetic Response of a Hot QCD Medium in Heavy Ion Collisions

The responses of the strong electromagnetic (EM) fields, produced in the early stages of non-central heavy-ion collisions, to electromagnetically charged QGP, have been investigated by studying the temperature dependence of electrical conductivity and charge diffusion in the hot QCD medium. The transport coefficients have been estimated by solving the relativistic transport equation in the Chapman–Enskog method, with the thermal relaxation times of constituent quarks and gluons as dynamical input. In order to describe the hot QCD medium, an effective quasi-particle model has been introduced, that includes both improved perturbative hot QCD EOSs as well as the lattice QCD EOS. The resulting effects cast significant impact on the temperature behavior of the estimated transport parameters.