Gießen 2007 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 14: Theorie

HK 14.7: Talk

Tuesday, March 13, 2007, 15:45–16:00, C

Memory effects in the Bremsstrahlung emission 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 the main source for energy loss of high pT partons in a quark gluon plasma. Since the quark gluon plasma produced 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 Schwinger Keldysh formalism to describe such a non equilibrium process 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 shows that the radiative behavior follows the changes in the medium almost instantaneously.