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Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Schwerionenkollisionen und QCD Phasen

HK 5.6: Talk

Monday, March 17, 2014, 15:15–15:30, HZ 7

Reconstruction of π0 mesons via conversion method in Au+Au at 1.23AGeV with HADES — •Claudia Behnke for the HADES collaboration — Institut für Kernphysik, Goethe Universität Frankfurt

Lepton pairs emerging from decays of virtual photons are one of the most promising probes of compressed hadronic matter. The HADES experiment at GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt studies di-electron radiation as well as strangeness production in various reactions, i.e. pion, proton, deuteron and heavy-ion induced reactions. The understanding of the corresponding experimental results calls for supporting studies from various model calculations. For a model-independent understanding of the dilepton cocktail the production cross sections of particles decaying during the freeze-out is crucial. In this contribution the capability of HADES to detect e+e pairs from conversion of real photons will be demonstrated. We will present results from a two-photon analysis of Au+Au collisions at 1.23 GeV/u providing information on π0 and η mesons. Supported by BMBF (05P12RFGHJ), Helmholtz Alliance EMMI, HIC for FAIR, HGS-HIRe

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