Viscous QCD medium effects on the bottom quark transport coefficients

TL;DR

This paper investigates how viscous effects in a QCD medium influence the transport properties of bottom quarks, considering both collisional and radiative processes within a quasiparticle model.

Contribution

It introduces a comprehensive analysis of bottom quark transport coefficients incorporating viscous QGP effects using the EQPM framework, highlighting differences with charm quark behavior.

Findings

Radiative processes dominate at higher initial momenta for bottom quarks.

Viscous corrections have a more significant impact on charm quarks than on bottom quarks.

Transport coefficients depend on initial momentum and temperature of the QGP.

Abstract

The bottom quark transport coefficients, i.e., drag and diffusion coefficients, have been studied for the collisional and soft gluon radiative processes within the viscous QCD medium. The thermal medium effects are incorporated using the effective fugacity quasiparticle model (EQPM). Both the shear and bulk viscous effects at leading order are embedded through the near-equilibrium distribution functions of the quark-gluon plasma (QGP) constituent quasiparticles. The transport coefficients' dependence on the bottom quark's initial momentum and QGP temperature has been investigated. The relative dominance of the radiative over the collisional process for the bottom quark seems to occur at a higher initial momentum compared to that of the charm quark. In contrast, the effect of the viscous corrections seems to be more for the charm quark.