Shear Viscosity in a Gluon Gas

Journal Article · Fri May 02 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.172301· OSTI ID:21128102

Zhe, Xu; Greiner, Carsten ^[1]

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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, Vol. 100, Issue 17; Other Information: DOI: 10.1103/PhysRevLett.100.172301; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BREMSSTRAHLUNG
ELASTIC SCATTERING
ENTROPY
GLUONS
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
RELATIVISTIC RANGE