Gluon bremsstrahlung by heavy quarks - its effects on transport coefficients and equilibrium distribution

TL;DR

This paper investigates how gluon radiation by charm quarks influences their transport properties in quark-gluon plasma, revealing significant effects on transport coefficients but negligible impact on equilibrium distribution.

Contribution

It provides a detailed analysis of gluon bremsstrahlung effects on charm quark transport coefficients within pQCD and kinetic theory frameworks.

Findings

Gluon radiation significantly alters charm quark transport coefficients.

Effects on equilibrium distribution function are negligible.

Soft gluon radiation impacts shear viscosity and diffusion coefficients.

Abstract

The effects of gluon radiation by charm quarks on the transport coefficients {\it e.g.} drag, longitudinal and transverse diffusion and shear viscosity have been studied within the ambit of perturbative quantum chromodynamics (pQCD) and kinetic theory. We found that while the soft gluon radiation has substantial effects on the transport coefficients of the charm quarks in the quark gluon plasma its effects on the equilibrium distribution function is insignificant.