1212.5393 (V. Ozvenchuk et al.)

Shear and bulk viscosities of strongly-interacting 'infinite'
parton-hadron matter within the Parton-Hadron-String (PHSD) transport
approach    [PDF]

V. Ozvenchuk, O. Linnyk, M. I. Gorenstein, E. L. Bratkovskaya, W. Cassing

We study the shear and bulk viscosities of partonic and hadronic matter as functions of temperature T within the Parton-Hadron-String Dynamics (PHSD) off-shell transport approach. Dynamical hadronic and partonic systems in equilibrium are studied by the PHSD simulations in a finite box with periodic boundary conditions. The ratio of the shear viscosity to entropy density \eta(T)/s(T) from PHSD shows a minimum (with a value of about 0.1) close to the critical temperature T_c, while it approaches the perturbative QCD (pQCD) limit at higher temperatures in line with lattice QCD results. For TView original: http://arxiv.org/abs/1212.5393