Energy dependence of jet transport parameter and parton saturation in quark-gluon plasma

Simple item page
dc.creatorCasalderrey-Solana, Jorge
dc.creatorWang, Xin-Nian
dc.date2007-05-09
dc.date2008-01-31
dc.date.accessioned2026-07-07T11:20:35Z
dc.date.available2026-07-07T11:20:35Z
dc.descriptionWe study the evolution and saturation of the gluon distribution function in the quark-gluon plasma as probed by a propagating parton and its effect on the computation of jet quenching or transport parameter $\hat{q}$. For thermal partons, the saturation scale $Q^2_s$ is found to be proportional to the Debye screening mass $μ_D^2$. For hard probes, evolution at small $x=Q^2_s/6ET$ leads to jet energy dependence of $\hat{q}$. We study this dependence for both a conformal gauge theory in weak and strong coupling limit and for (pure gluon) QCD. The energy dependence can be used to extract the shear viscosity $η$ of the medium since $η$ can be related to the transport parameter for thermal partons in a transport description. We also derive upper bounds on the transport parameter for both energetic and thermal partons. The later leads to a lower bound on shear viscosity-to-entropy density ratio which is consistent with the conjectured lower bound $η/s\geq 1/4π$. We also discuss the implications on the study of jet quenching at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider and the bulk properties of the dense matter.
dc.description15 pages in RevTex with 9 figures (v4 final published version)
dc.identifierhttps://arxiv.org/abs/0705.1352
dc.identifierhttp://arxiv.org/abs/0705.1352
dc.identifierPhys.Rev.C77:024902,2008
dc.identifierdoi:10.1103/PhysRevC.77.024902
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194006
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleEnergy dependence of jet transport parameter and parton saturation in quark-gluon plasma
dc.typetext

Files

Collections

arXiv