Mixture of quark and gluon fluids described in terms of anisotropic hydrodynamics

TL;DR

This paper develops anisotropic hydrodynamics equations for a quark-gluon mixture, validated against exact kinetic theory solutions, showing strong agreement in the Bjorken flow scenario.

Contribution

It introduces a new anisotropic hydrodynamics framework for quark-gluon mixtures based on moments of RTA kinetic equations, validated against Boltzmann solutions.

Findings

Hydrodynamics results closely match kinetic theory in Bjorken flow.

The formulation accurately describes quark-gluon mixtures.

Good agreement demonstrates the model's validity.

Abstract

A system of equations of anisotropic hydrodynamics that describes mixture of quark and gluon fluids is studied. The equations are based on the zeroth, first, and second moments of the RTA kinetic equations. Tests of this formulation are performed by comparing the results of anisotropic hydorodynamics with the exact solutions of the Boltzmann equations for a mixture of fluids in the Bjorken flow limit. One finds a very good agreement between the hydrodynamic and kinetic-theory results.