Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster

HK 27.27: Poster

Dienstag, 28. März 2017, 16:45–18:45, F Foyer

π⁰ and η production in π⁻ induced reactions with HADES* — •Jan-Hendrik Otto for the HADES collaboration — Justus Liebig Universität Gießen

The High Acceptance DiElectron Spectrometer (HADES), located at GSI, Darmstadt, Germany, is build to study properties of baryon rich matter and particle and resonance production in elementary collisions.

In the HADES beam time in 2014 several pion induced reactions have been investigated using a negatively charged pion beam and either a Polyethylene, Carbon or Tungsten target. Those systems have been measured at different energies provided by the SIS18 accelerator.

In this contribution we present the status of the reconstruction of π⁰ and η mesons using the photon conversion method in pion induced reactions for various pion beam momentum ranging from 0.69 GeV/c to 1.7 GeV/c. Further we aim at extracting a transverse momentum spectrum of photons and to use it as a reference spectrum for Au+Au collisions. This analysis will bring insides to our understanding of the contribution of photons from Dalitz decays of baryons to the so called ’direct’ photon spectra extracted from Au+Au collisions.

(*supported by BMBF grants 05P15RGFCA)