Hard-thermal-loop resummed pressure of a degenerate quark-gluon plasma

TL;DR

This paper calculates the pressure of a dense quark-gluon plasma at zero temperature using hard-thermal-loop perturbation theory, comparing results with weak-coupling and quasiparticle models.

Contribution

It provides the first leading-order calculation of the pressure at finite density and zero temperature within the HTL framework, including fermionic excitations and Landau damping.

Findings

Results agree with weak-coupling expansion up to order α_s^2

Quasiparticle model with μ-dependent mass matches HTL results

Highlights the importance of Landau damping in the pressure calculation

Abstract

We compute the pressure of a finite density quark-gluon plasma at zero temperature to leading order in hard-thermal-loop perturbation theory, which includes the fermionic excitations and Landau damping. The result is compared with the weak-coupling expansion for finite positive chemical potential $\mu$ through order $\alpha_s^2$ and with a quasiparticle model with a mass depending on $\mu$.