Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Heavy Ion Collision and QCD Phases XI

HK 56.4: Talk

Thursday, March 17, 2016, 17:15–17:30, S1/01 A01

Status of the direct photon analysis for Au+Au collisions at 1.23 AGeV measured by the HADES experiment — •Christina Deveaux for the HADES collaboration — Justus-Liebig-Universitaet

Measurements of direct photons from PHENIX and ALICE experiments at high energies show an unexpectedly high yield combined with a large elliptic flow. Both observations cannot be reconciled with current models describing the evolution of the fireball. In order to provide additional empirical data to this discussion, we analyze data on Au+Au collisions at 1.23 AGeV taken by the HADES experiment at GSI Helmholtzzentrum, Darmstadt. We present the status of our direct photon reconstruction and discuss the option to extend this study to elliptic flow. Supported by BMBF and HIC for FAIR.