Energy dependence of jet transport parameter and parton saturationin quark-gluon plasma
Journal Article
·
· Physical Review C
OSTI ID:929024
We study the evolution and saturation of the gluondistribution function in the quark-gluon plasma as probed by apropagating parton and its effect on the computation of jet quenching ortransport parameter $$\hat q $$. For thermal partons, the saturation scale$$Q2_s$$ is found to be proportional to the Debye screening mass $$\mu_D2$$.For hard probes, evolution at small $$x=Q2_s/6ET$$ leads to jet energydependence of hat q. We study this dependence for both a conformal gaugetheory in weak and strong coupling limit and for (pure gluon) QCD. Theenergy dependence can be used to extract the shear viscosity $$\eta$$ ofthe medium since $$\eta$$ can be related to the transport parameter forthermal partons in a transport description. We also derive upper boundson the transport parameter for both energetic and thermal partons. Thelater leads to a lower bound on shear viscosity-to-entropy density ratiowhich is consistent with the conjectured lower bound $$\eta/s\geq 1/4\pi$$.Implications on the study of jet quenching at RHIC and LHC and the bulkproperties of the dense matter are discussed.
- Research Organization:
- Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director. Office of Science. NuclearPhysics
- DOE Contract Number:
- AC02-05CH11231
- OSTI ID:
- 929024
- Report Number(s):
- LBNL--63308; BnR: KB0301020
- Journal Information:
- Physical Review C, Journal Name: Physical Review C Journal Issue: 0 Vol. 0
- Country of Publication:
- United States
- Language:
- English
Similar Records
Energy dependence of jet transport parameter and parton saturation in quark-gluon plasma
Partonic effects on dijet correlations in relativistic heavy ion collisions
Transport coefficients of the quark-gluon plasma at the critical point and across the first-order line
Journal Article
·
Thu Feb 14 23:00:00 EST 2008
· Physical Review. C, Nuclear Physics
·
OSTI ID:21068138
Partonic effects on dijet correlations in relativistic heavy ion collisions
Journal Article
·
Thu Oct 15 00:00:00 EDT 2009
· Physical Review. C, Nuclear Physics
·
OSTI ID:21293907
Transport coefficients of the quark-gluon plasma at the critical point and across the first-order line
Journal Article
·
Mon Aug 22 20:00:00 EDT 2022
· Physical Review. D.
·
OSTI ID:1980150