Reconstruction of π~0 and η mesons via conversion method in Au+Au at 1.23AGeV with HADES

摘要

Lepton pairs emerging from decays of virtual photons are one of the most promising probes of dense hadronic matter. The HADES experiment at GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt studies dielectron radiation as well as strangeness production in various reactions, i.e. proton, deuteron and heavy-ion. The understanding of the corresponding experimental results calls for supporting studies from various model calculations. For a more model independent understanding of the dilepton cocktail the production cross sections of particles created during the freeze-out is crucial. In this contribution we will present results from a two photon analysis of Au+Au in 1.23 GeV/u collisions providing information on π~0 and η mesons. Therefore the capability of HADES to detect e~+e~- pairs from external conversion of real photons will be explained and first results will be shown.