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Shear and bulk viscosities for pure glue matter

Shear and bulk viscosities for pure glue matter Shear η and bulk ζ viscosities are calculated in a quasiparticle model within a relaxation-time approximation for pure gluon matter. Below T c , the confined sector is described within a quasiparticle glueball model. The constructed equation of state reproduces the first-order phase transition for the glue matter. It is shown that with this equation of state, it is possible to describe the temperature dependence of the shear viscosity to entropy ratio η / s and the bulk viscosity to entropy ratio ζ / s in reasonable agreement with available lattice data, but absolute values of the ζ / s ratio underestimate the upper limits of this ratio in the lattice measurements typically by an order of magnitude. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review C American Physical Society (APS)

Shear and bulk viscosities for pure glue matter

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Publisher
American Physical Society (APS)
Copyright
Copyright © 2011 The American Physical Society
ISSN
0556-2813
eISSN
1089-490X
DOI
10.1103/PhysRevC.83.035204
Publisher site
See Article on Publisher Site

Abstract

Shear η and bulk ζ viscosities are calculated in a quasiparticle model within a relaxation-time approximation for pure gluon matter. Below T c , the confined sector is described within a quasiparticle glueball model. The constructed equation of state reproduces the first-order phase transition for the glue matter. It is shown that with this equation of state, it is possible to describe the temperature dependence of the shear viscosity to entropy ratio η / s and the bulk viscosity to entropy ratio ζ / s in reasonable agreement with available lattice data, but absolute values of the ζ / s ratio underestimate the upper limits of this ratio in the lattice measurements typically by an order of magnitude.

Journal

Physical Review CAmerican Physical Society (APS)

Published: Mar 1, 2011

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