Abstract
We study dynamic features of a plasma consisting of gluons whose infrared dynamics is improved by the Gribov-Zwanziger quantization. This approach embodies essential features of color confinement which set the plasma apart from conventional quasiparticle systems in several aspects. Our study focusses on a boost-invariant expansion for in- and out-of-equilibrium settings within a momentum-independent relaxation time approximation, which at late times can be characterized by the sound velocity , and the shear and bulk viscosities. We obtain explicit expressions for the transport coefficients and and check that they are consistent with the numerical solutions of the kinetic equation. At high temperature, keeping also the Gribov parameter constant, we find a scaling which manifests strong breaking of conformal symmetry in contrast to the case of weakly coupled plasmas.
4 More- Received 25 November 2015
- Revised 18 August 2016
DOI:https://doi.org/10.1103/PhysRevC.94.044904
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