Hard parton damping in hot QCD

Abstract

The gluon and quark collisional widths in hot QCD plasmas are discussed with emphasis on temperatures near Tc, where the coupling is large. Considering the effect on the entropy, which is known from lattice calculations, it is argued that the width of the partons, which in the perturbative limit is given by gamma ~ g^2 ln(1/g) T, should be sizeable at intermediate temperatures but has to be small close to Tc. This behavior implies a substantial reduction of the radiative energy loss of jets near Tc.

invitetd talk given at 'Hot Quarks 04', July 18-24 2004, Taos Valley, NM, USA

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• Transport coefficients from the Nambu-Jona-Lasinio model for $SU(3{)}_f$
• Electrical Conductivity of Hot QCD Matter
• Dynamical quasiparticles properties and effective interactions in the sQGP
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• Quasi-Particle Description of Strongly Interacting Matter: Towards a Foundation
• Dynamical collisional energy loss and transport properties of on- and off-shell heavy quarks in vacuum and in the Quark Gluon Plasma
• A dynamical quasiparticle approach for the Quark-Gluon-Plasma bulk and transport properties
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• Dynamical equilibration of strongly interacting "infinite" parton matter within the parton-hadron-string dynamics transport approach
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• Shear viscosity of the Quark-Gluon Plasma from a virial expansion
• The quark susceptibility in a generalized dynamical quasiparticle model
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• Heavy quark scattering and quenching in a QCD medium at finite temperature and chemical potential
• Baryon-antibaryon dynamics in relativistic heavy-ion collisions
• QCD equation of state in a virial expansion
• Heavy quark damping rate in hot viscous QCD plasma