Jet quenching parameter \hat q in the stochastic QCD vacuum with Landau damping
Abstract
We argue that the radiative energy loss of a parton traversing the quark-gluon plasma is determined by Landau damping of soft modes in the plasma. Using this idea, we calculate the jet quenching parameter of a gluon. The calculation is done in SU(3) quenched QCD within the stochastic vacuum model. At the LHC-relevant temperatures, the result depends on the gluon condensate, the vacuum correlation length, and the gluon Debye mass. Numerically, when the temperature varies from T=T_c to T=900 MeV, the jet quenching parameter rises from \hat q=0 to approximately 1.8 GeV^2/fm. We compare our results with the predictions of perturbative QCD and other calculations.
Keywords
Cite
@article{arxiv.0710.1540,
title = {Jet quenching parameter \hat q in the stochastic QCD vacuum with Landau damping},
author = {D. Antonov and H. -J. Pirner},
journal= {arXiv preprint arXiv:0710.1540},
year = {2008}
}
Comments
20 pages, 6 figures, discussions and references added; final version to appear in Eur. Phys. J. C