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Jet quenching parameter \(\hat{q}\) in the stochastic QCD vacuum with Landau damping

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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=Tc to T = 900 MeV, the jet quenching parameter rises from \(\hat{q}=0\) to approximately 1.8 GeV2/fm. We compare our results with the predictions of perturbative QCD and other calculations.

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Authors and Affiliations

  1. Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 19, 69120, Heidelberg, Germany

    D. Antonov & H.-J. Pirner

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  1. D. Antonov
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  2. H.-J. Pirner
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Correspondence to D. Antonov.

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Antonov, D., Pirner, HJ. Jet quenching parameter \(\hat{q}\) in the stochastic QCD vacuum with Landau damping. Eur. Phys. J. C 55, 439–447 (2008). https://doi.org/10.1140/epjc/s10052-008-0599-1

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  • DOI: https://doi.org/10.1140/epjc/s10052-008-0599-1

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