Kinetic coefficients in ultra-relativistic heavy ion collisions

Kinetic coefficients of QCD-like matter, as expected in relativistic heavy-ion collisions and in the early universe, are considered in the framework of relativistic kinetic theory. Expressions for the shear viscosity and the heat conductivity of pure quark-like matter were derived. These are compared to similar quantities in quark-antiquark-like matter, and expressions for the thermal diffusion and diffusion coefficients are presented. Results are compared with similar calculations in the literature in which other approximation schemes have been used. Applications to ultra-relativistic collisions are discussed. 26 refs., 5 figs