Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster

HK 52.7: Poster

Donnerstag, 1. März 2018, 16:30–18:45, Audimax Foyer

Can Experimental Data From HADES Be Described With Thermal Models? — •Julia Stumm and Roman Hensch for the HADES collaboration — Goethe-Universität, Frankfurt am Main

The study of particle production in heavy ion collisions is of great interest for our understanding of medium properties in dense baryonic matter. Using the HADES detector at the “Helmholtzzentrum für Schwerionenforschung“ in Darmstadt, Au+Au Collisions at 1.23A GeV have been studied and particle multiplicities for different centrality classes have been measured. Special attention has been paid to strange hadron production, which occurs at sub threshold energies. An important finding was that about 30% of the K⁻ Mesons do not actually originate directly from the fireball, but instead stem from φ-Decays. Therefore, to interpret the spectra one has to disentangle the various particle sources. We used the statistical model THERMUS to estimate the fireball parameters, in particular temperature, volume and the baryochemical potential, and to compare hadron multiplicities. We further explore how well transverse hadron spectra can be described by a superposition of various thermal sources, in addition to a radial expansion of the fireball.
This work has been supported by BMBF (05P15RFFCA), GSI and HIC for FAIR.