Derivation of transient relativistic fluid dynamics from the Boltzmann   equation for a multi-component system
  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. 
G. S. Denicol and H. Niemi
nucl-th hep-ph