Shear Viscosity of Quark Matter

TL;DR

This paper investigates the shear viscosity of quark matter above the deconfinement temperature, analyzing how it varies with different quark self-energy models and coupling strengths, and compares results with existing studies.

Contribution

It introduces a detailed computation of shear viscosity and entropy density for quark matter considering temperature-dependent self-energy effects.

Findings

Viscosity and entropy density depend on quark self-energy characteristics.

The ratio of shear viscosity to entropy density varies with coupling strength.

Results are compared with previous theoretical findings.

Abstract

We consider the shear viscosity of a system of quarks and its ratio to the entropy density above the critical temperature for deconfinement. Both quantities are derived and computed for different modeling of the quark self-energy, also allowing for a temperature dependence of the effective mass and width. The behaviour of the viscosity and the entropy density is argued in terms of the strength of the coupling and of the main characteristics of the quark self-energy. A comparison with existing results is also discussed.