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HK: Fachverband Physik der Hadronen und Kerne

HK 15: Heavy Ion Collisions and QCD Phases 2

HK 15.1: Group Report

Monday, March 23, 2015, 17:00–17:30, T/HS1

Rare hadronic probes from Au+Au collisions at 1.23 AGeV — •Timo Scheib for the HADES collaboration — Goethe-Universität Frankfurt

Over the years an extensive amount of data in the 1-2 AGeV energy regime has been collected leading to enormous improvements of our understanding of particle production mechanisms and HIC dynamics. At these beam energies, however, the production of hadrons is observed below or slightly above their free elementary production threshold. Due to this fact a comparison to reference data from elementary collisions is not straightforward and phenomenological models are mandatory.

Through rapidly advancing detector technologies and analysis techniques more and more precise data sets can be recorded and analyzed. In April 2012 HADES took data from Au+Au collisions at 1.23 AGeV with a – for this system size and energy – so far unreached precision and statistics (about 7 billion events). By determining the yields and spectra of a comprehensive set of hadrons produced in this system (π+/−, K+/−, KS0, Λ, φ) a detailed comparison with phenomenological models can be drawn, allowing to further deepen our understanding of hadron production in HIC.

This work has been supported by BMBF (05P12RFGHJ), GSI, HIC for FAIR, HGS-HIRe and H-QM.

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