The Role of Strange Quasiquarks in Transport Properties of the QGP

Valeriya Mykhaylova,G David,Z Xu,P Garg,I.-K Yoo,A Kalweit,S Mukherjee,T Ullrich

doi:10.1051/epjconf/202225910007

Abstract

We study the role of dynamical quarks in the transport properties of the deconfined hot medium utilizing the quasiparticle kinetic approach. The system is then composed of the quasiparticle excitations, whose interactions are encoded in their dynamical masses with temperature dependence specified by the effective coupling extracted from lattice QCD thermodynamics. Evaluating the temperature and flavor profiles of the shear and bulk viscosities, as well as the electrical conductivity we examine how different particle species, in particular strange quarks, modify the transport parameters of the deconfined matter.

Highlights

One of the major aims of the experimental and theoretical studies of the quark-gluon plasma (QGP) is to reveal its dynamical and transport properties, quantified by various transport parameters.The shear viscosity η measures the resistance of the fluid against momentum modifications during its longitudinal motion [1], while the bulk viscosity ζ indicates the energy dissipation caused by the expansion of the QGP [2]
We have examined the influence of different dynamical particles, especially the strange quarks, on transport coefficients of the deconfined matter
The transport parameters were computed within kinetic theory under the relaxation time approximation for a medium approached by the quasiparticle model (QPM)

Summary

Introduction

One of the major aims of the experimental and theoretical studies of the quark-gluon plasma (QGP) is to reveal its dynamical and transport properties, quantified by various transport parameters. The shear viscosity η measures the resistance of the fluid against momentum modifications during its longitudinal motion [1], while the bulk viscosity ζ indicates the energy dissipation caused by the expansion of the QGP [2]. Their dimensionless ratios to the entropy density, i.e. η/s, ζ/s are the major input in the hydrodynamic equations [3]. A precise determination of transport coefficients as functions of temperature and chemical potential is one of the main steps towards understanding the non-trivial evolution of strongly interacting matter.

Quasiparticle Model

Transport parameters in kinetic theory

Conclusions