Anisotropic hydrodynamics for mixture of quark and gluon fluids

TL;DR

This paper develops a new anisotropic hydrodynamics framework for quark-gluon mixtures, improving upon previous models by incorporating more general distribution functions and achieving better agreement with kinetic theory.

Contribution

It introduces a comprehensive set of equations for anisotropic quark-gluon fluids with generalized distribution functions, addressing previous limitations in the field.

Findings

Achieves good agreement with exact kinetic-theory results.

Overcomes main deficiencies of earlier anisotropic hydrodynamics models.

Provides a more flexible and accurate description of quark-gluon plasma dynamics.

Abstract

A system of equations for anisotropic hydrodynamics is derived that describes a mixture of anisotropic quark and gluon fluids. The consistent treatment of the zeroth, first and second moments of the kinetic equations allows us to construct a new framework with more general forms of the anisotropic phase-space distribution functions than those used before. In this way, the main difficiencies of the previous formulations of anisotropic hydrodynamics for mixtures have been overcome and the good agreement with the exact kinetic-theory results is obtained.