Extended linear‐sigma model: transport properties of QCD matter at finite temperature

Abstract

Since their discovery in heavy‐ion collisions, the transport properties of quantum chromodynamics (QCD) matter gained prominence among nuclear theorists. We introduce a new study based on a QCD‐like effective model. The thermal evolution of the electric and heat conductivity, and , respectively, and that if their ratios are evaluated in SU(3) extended linear‐sigma model (eLSM) with mean field approximation. Also, the bulk and shear viscosity normalized to the thermal entropy, and , respectively, as well as their ratios are estimated in the eLSM at finite temperature. Furthermore, the two ratios and are analyzed. The excellent agreement with recent lattice QCD calculations allows to draw the conclusion that the values assigned to the various eLSM‐parameters make this QCD‐like effective model capable of reproducing the non‐perturbative calculations of QCD matter, at finite temperatures.