Relaxation time ansatz and shear and bulk viscosities of gluon matter

Details Relaxation time ansatz and shear and bulk viscosities of gluon matter Relaxation time ansatz and shear and bulk viscosities of gluon matter

2011-06-23

arxiv.org/abs/1106.4734v2

Phys. Rev. C 84, 035202 (2011)

Physics

Nuclear Physics

Nuclear Theory

9 pages, 3 figures

Scientific paper

10.1103/PhysRevC.84.035202

Shear and bulk viscosity-to-entropy density ratios are calculated for the pure gluon matter in a non-equilibrium mean-field quasiparticle approach within the relaxation time approximation. We study how different approximations used in the literature affect the results for the shear and bulk viscosities. Though the results for the shear viscosity turned out to be quite robust, all evaluations of the shear and bulk viscosities obtained in the framework of the relaxation time approximation can be considered only as rough estimations.

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