Darmstadt 2016 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Heavy Ion Collision and QCD Phases V
HK 18.2: Talk
Tuesday, March 15, 2016, 14:15–14:30, S1/01 A4
Reconstruction of Neutral Mesons via Conversion Method in Au+Au at 1.23AGeV with HADES — •Claudia Behnke for the HADES collaboration — IKF, Goethe Universität Frankfurt
The HADES experiment at GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt has measured virtual photon production in Au+Au collisions at 1.23 AGeV. The yield measured for the Au+Au systems exceeds the N+N reference by a factor 8-10. A more accurate determination of the medium radiation depends on a precise knowledge of the underlying hadronic cocktail composed of various sources contributing to the net spectra. Therefore, a measurement of the neutral meson yields together with the dileptons 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 AGeV providing information of neutral π0 and η mesons. A phase space dependent analysis of π0 production as well as a yield estimation for the η-meson will be presented. Supported by BMBF (05P12RFGHJ,05P15RFFCA), HIC for FAIR, GSI, HGS-HIRe and H-QM.