Phys. Rev. Lett. 100, 172301 (2008) [4 pages]Shear Viscosity in a Gluon GasReceived 30 November 2007; published 29 April 2008 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 η/s for a gluon gas, which involves elastic gg→gg perturbative QCD (PQCD) scatterings as well as inelastic gg↔ggg PQCD bremsstrahlung. For αs=0.3 we find η/s=0.13 and for αs=0.6, η/s=0.076. The small η/s values, which suggest strongly coupled systems, are due to the gluon bremsstrahlung incorporated. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.172301
DOI:
10.1103/PhysRevLett.100.172301
PACS:
12.38.Mh, 05.60.−k, 25.75.−q, 51.20.+d
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.