Exact solutions of the (0+1)-dimensional kinetic equation in the relaxation time approximation

Abstract

We present exact solutions of the (0+1)-dimensional kinetic equation for a massive gas in the relaxation time approximation. At first, we analyse the case of classical statistics and argue that the traditional second-order hydrodynamics misses the shear-bulk coupling. In the next step, we include Bose-Einstein and Fermi-Dirac statistics in the calculations and show that they are important for description of the effects connected with bulk viscosity.

Comments: 4 pages, 6 pictures, Talk presented at the Hot Quarks 2014, Las Negras, Spain. Slightly changed results for the bulk viscous pressure, conclusions unchanged