Viscosity and thermodynamic properties of QGP in relativistic heavy ion collisions

Abstract

We study the viscosity and thermodynamic properties of QGP at RHIC by employing the recently extracted equilibrium distribution functions from two hot QCD equations of state of $O(g^5)$ and $O(g^6\ln (1/g))$ respectively. After obtaining the temperature dependence of energy density, and entropy density, we focus our attention on the determination of shear viscosity for a rapidly expanding interacting plasma, as a function of temperature. We find that interactions significantly decrease the shear viscosity. They decrease the viscosity to entropy density ratio, $\eta /\mathcal{S}$ as well.

21 pages, 10 figures, Version to appear in EPJC

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• Quasi-particle model for lattice QCD: quark-gluon plasma in heavy ion collisions
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• Quarkonia in anisotropic hot QCD medium in a quasi-particle model
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• Impact of momentum-space anisotropy on heavy quark dynamics in a QGP medium
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• Thermal dilepton production in collisional hot QCD medium in the presence of chromo-turbulent fields
• Temperature fluctuations and Tsallis statistics in Relativistic Heavy Ion collisions
• Baryon Number Fluctuations in Quasi-particle Model