Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-05-30
Eur.Phys.J.C59:705-714,2009
Physics
Nuclear Physics
Nuclear Theory
21 pages, 10 figures, Version to appear in EPJC
Scientific paper
10.1140/epjc/s10052-008-0814-0
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.
Chandra Vinod
Ravishankar V.
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