Jet quenching parameter in the stochastic QCD vacuum with Landau damping

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. A...

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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2008-06, Vol.55 (3), p.439-447
Hauptverfasser:	Antonov, D., Pirner, H.-J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Astrophysics and Cosmology Elementary Particles Energy dissipation Gluons Hadrons Heavy Ions Landau damping Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Parameters Partons Physics Physics and Astronomy Quantum chromodynamics Quantum Field Theories Quantum Field Theory Quark-gluon plasma Quenching Regular Article - Theoretical Physics Specific heat String Theory
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Zusammenfassung:	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 to approximately 1.8 GeV 2 /fm. We compare our results with the predictions of perturbative QCD and other calculations.
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-008-0599-1