Mixture of anisotropic fluids

TL;DR

This paper extends a model of coupled quark and gluon anisotropic fluids to include quark-gluon transitions, analyzing their impact on thermalization rates and revealing configuration-dependent effects.

Contribution

It introduces a generalized approach that explicitly incorporates quark-gluon transitions into anisotropic fluid dynamics, studying their influence on thermalization.

Findings

Quark-gluon transitions can accelerate thermalization in mixed oblate-prolate or prolate configurations.

No significant effect on thermalization rate in oblate configurations.

Late-time behavior follows exponential decay or power law.

Abstract

The recently introduced approach describing coupled quark and gluon anisotropic fluids is generalized to include explicitly the transitions between quarks and gluons. We study the effects of such processes on the thermalization rate of anisotropic systems. We find that the quark-gluon transitions may enhance the overall thermalization rate in the cases where the initial momentum anisotropies correspond to mixed oblate-prolate or prolate configurations. On the other hand, no effect on the thermalization rate is found in the case of oblate configurations. The observed regularities are connected with the late-time behavior of the analyzed systems which is described either by the exponential decay or the power law.