Reconstruction of π0 and η mesons via conversion method in Au+Au at 1.23 GeV/u with HADES

FAIR Next Generation ScientistS 2014

Behnke, C.^1

Goethe Universität Frankfurt, Max-von-Laue-Str. 1, Frankfurt am Main

60438, Germany^1

关键词: Au+Au collisions;    Conversion methods;    Energy domain;    Extreme conditions;    Lepton pairs;    Real photon;    Strangeness production;    Virtual photons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/599/1/012029/pdf
DOI  :  10.1088/1742-6596/599/1/012029

来源: IOP

【 摘 要 】

Lepton pairs emerging from decays of virtual photons represent promising probes of matter under extreme conditions. In the energy domain of 1 - 2 GeV per nucleon, the HADES experiment at GSI Helmholtzzentrum fuer Schwerionenforschung in Darmstadt studies di-electrons and strangeness production in various reactions, i.e. collisions of pions, protons, deuterons, heavy-ions, and nuceous with nuclei. An 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 GeV/u providing information on neutral π0and η mesons.