Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 7: Schwerionenkollisionen und QCD Phasen

HK 7.1: Gruppenbericht

Montag, 19. März 2012, 14:00–14:30, P 5

Dilepton production at SIS energies with the GiBUU transport model — •Janus Weil and Ulrich Mosel — Institut für Theoretische Physik, Universität Giessen, Germany

We investigate dilepton production at SIS energies with the GiBUU transport code in a resonance model approach. In a first step, we fix the model input via dilepton spectra from elementary NN collisions (measured recently by the HADES collaboration) as well as other elementary data, paying special attention to meson production via baryon resonances (which is most important for the ρ). Subsequently, we investigate additional effects of the nuclear medium in pA and AA reactions, from collisional broadening and meson absorption to a possible in-medium mass-shift of the vector mesons. Work supported by HGS-HIRe and BMBF.