Derivation of transient relativistic fluid dynamics from the Boltzmann equation for a multi-component system

Abstract

We derive the non-equilibrium single-particle momentum distribution function of a hadron resonance gas. We then study the effects that this newly derived expression can have in the freeze-out description of fluid-dynamical models of heavy ion collisions and compare it with the method traditionally employed, the 14-moment approximation.

Comments: 4 pages, 3 figures, submitted to the proceedings of the 23rd International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Quark Matter 2012, August 13-18, 2012, Washington DC