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HK: Fachverband Physik der Hadronen und Kerne

HK 28: Theorie

HK 28.7: Talk

Tuesday, March 11, 2008, 12:45–13:00, 2F

Bremsstrahlung from a fermion jet in a non equilibrated hot plasma — •Frank Michler, Björn Schenke, and Carsten Greiner — Institut für theoretische Physik, Johann Wolfgang Goethe Universität Frankfurt am Main, Max von Laue Straße 1, 60438 Frankfurt am Main, Germany

Radiative processes have been found to be one main reason for energy loss of hard probes in a quark gluon plasma. Since the quark gluon plasma created in heavy ion collisions expands and cools down before it hadronizes, the density of scattering centers is decreasing in time, which makes the radiative behavior of the jet time dependent. We use the real time formalism to describe such a non equilibrium phenomenon including the Laundau Pomeranschuk Migdal effect. As a first step we restrict our calculations to QED-like interactions, i.e., to ordinary photon emission. A comparision of our results to a quasistatic calculation reveals that the radiative behavior follows the changes in the medium almost instantaneously.