Journal
ANNALEN DER PHYSIK
Volume 522, Issue 11, Pages 849-856Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/andp.201000056
Keywords
Viscosity; quark deconfinement; thermal conduction in gases; quantum field theory
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Assuming that the Hagedorn fluid composed of known particles and resonances with masses m < 2 GeV obeys the first-order theory (Eckart) of relativistic fluid, we discuss the transport properties of QCD confined phase. Based on the relativistic kinetic theory formulated under the relaxation time approximation, expressions for bulk and shear viscosity in thermal medium of hadron resonances are derived. The relaxation time in the Hagedorn dynamical fluid exclusively takes into account the decay and eventually van der Waals processes. We comment on the in-medium thermal effects on bulk and shear viscosity and averaged relaxation time with and without the excluded-volume approach. As an application of these results, we suggest the dynamics of heavy-ion collisions, non-equilibrium thermodynamics and the cosmological models, which require thermo- and hydro-dynamics equations of state. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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