Transport coefficients of the Gribov-Zwanziger plasma

Wojciech Florkowski, Radoslaw Ryblewski, Nan Su, and Konrad Tywoniuk
Phys. Rev. C 94, 044904 – Published 12 October 2016

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 cs, and the shear η and bulk ζ viscosities. We obtain explicit expressions for the transport coefficients η and ζ 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 ζ/η1/3cs2 which manifests strong breaking of conformal symmetry in contrast to the case of weakly coupled plasmas.

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  • Received 25 November 2015
  • Revised 18 August 2016

DOI:https://doi.org/10.1103/PhysRevC.94.044904

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsStatistical Physics & Thermodynamics

Authors & Affiliations

Wojciech Florkowski* and Radoslaw Ryblewski

  • Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland

Nan Su

  • Institut für Theoretische Physik, Goethe-Universität Frankfurt, D-60438 Frankfurt am Main, Germany

Konrad Tywoniuk§

  • Deptartamento d'Estructura i Constituents de la Matèria, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona, Martì Franquès 1, E-08028 Barcelona, Spain

  • *wojciech.florkowski@ifj.edu.pl
  • radoslaw.ryblewski@ifj.edu.pl
  • nansu@th.physik.uni-frankfurt.de
  • §Present address: Theoretical Physics Department, CERN, Geneva, Switzerland; konrad.tywoniuk@cern.ch

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Issue

Vol. 94, Iss. 4 — October 2016

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