Heavy quark damping rate in hot viscous QCD plasma

TL;DR

This paper derives a formula for the heavy quark damping rate in a viscous quark-gluon plasma, accounting for out-of-equilibrium effects and magnetic sector divergences, and estimates viscosity corrections.

Contribution

It introduces a novel expression for heavy quark damping in viscous QCD plasma with flow, including first-order viscosity corrections and addressing magnetic sector divergences.

Findings

Magnetic sector exhibits infrared divergences similar to non-viscous plasma.

First-order viscosity correction to the damping rate is estimated.

Out-of-equilibrium bath particles influence damping in viscous plasma.

Abstract

We derive an expression for the heavy quark damping rate in hot quark gluon plasma in presence of flow. Here all the bath particles here are out of equilibrium due to the existence of non-zero velocity gradient. The magnetic sector shows similar infrared divergences even after hard thermal loop corrections as one encounters in case of non-viscous plasma. We estimate the first order correction in ($\eta/s$) for heavy quark damping rate due to the non-zero viscosity of the QCD plasma.