Quarkonium in a bulk viscous QGP medium

TL;DR

This paper investigates how bulk viscosity in a quark-gluon plasma affects heavy quarkonium properties, including binding energies and melting temperatures, by incorporating viscous effects into the potential model.

Contribution

It introduces a method to include bulk viscous effects into the quarkonium potential via deformation of thermal distribution functions and computes resulting properties.

Findings

Bulk viscosity modifies quarkonium binding energies.

Bulk viscous effects influence quarkonium melting temperatures.

Potential deformation impacts quarkonium decay widths.

Abstract

The non-equilibrium properties of quark-gluon plasma (QGP) have been a topic of intensive research. In this contribution, we explore the nature of heavy quarkonia immersed in a QGP with bulk viscosity. We incorporate the bulk viscous effect through the deformation of the distribution functions of thermal quarks and gluons, with which the color dielectric permittivity can be computed. We use the color dielectric permittivity to compute the heavy quark potential inside a bulk viscous plasma and solve the Schr\"odinger equation using the potential to obtain the physical properties such as binding energies and decay widths. We discuss the effect of the bulk viscous correction on the quarkonium properties and the melting temperatures.