Speaker
Ms
Claudia Behnke
(Uni Frankfurt)
Description
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 and heavy-ions 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 conversions 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 $\pi^0$ and $\eta$ mesons.
Supported by BMBF (06FY9100I and 06FY7114), HIC for FAIR, EMMI, GSI, HGS-Hire and H-QM
Primary author
Ms
Claudia Behnke
(Uni Frankfurt)
