Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Shear Viscosity in a Gluon Gas

Journal Article · · Physical Review Letters
;  [1]
  1. Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet Frankfurt, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main (Germany)
The relation of the shear viscosity coefficient to the recently introduced transport rate is derived within relativistic kinetic theory. We calculate the shear viscosity over entropy ratio {eta}/s for a gluon gas, which involves elastic gg{yields}gg perturbative QCD (PQCD) scatterings as well as inelastic gg{r_reversible}ggg PQCD bremsstrahlung. For {alpha}{sub s}=0.3 we find {eta}/s=0.13 and for {alpha}{sub s}=0.6, {eta}/s=0.076. The small {eta}/s values, which suggest strongly coupled systems, are due to the gluon bremsstrahlung incorporated.
OSTI ID:
21128102
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

Similar Records

How perfect can a gluon plasma be in perturbative QCD?
Journal Article · Mon Jan 31 23:00:00 EST 2011 · Physical Review. D, Particles Fields · OSTI ID:21504891

Perturbative QCD Calculations of Elliptic Flow and Shear Viscosity in Au+Au Collisions at {radical}(s{sub NN})=200 GeV
Journal Article · Fri Aug 22 00:00:00 EDT 2008 · Physical Review Letters · OSTI ID:21134151

Shear viscosity and out of equilibrium dynamics
Journal Article · Wed Apr 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics · OSTI ID:21289878