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München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 19: Heavy-Ion Collisions and QCD Phases III

HK 19.3: Vortrag

Dienstag, 19. März 2019, 14:45–15:00, HS 15

Light Nuclei Production in Au+Au Collisions at 1.23A GeV with HADES — •Melanie Szala for the HADES collaboration — Goethe Universität Frankfurt

In 2012 the HADES experiment at GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt measured Au+Au collisions at √sNN = 2.4 GeV. As light hadrons have successfully been analysed, we present recent results of light nuclei in order to extend the set of identified particles towards heavier hadrons.

After particle identification, the transverse mass spectra of the particle candidates are extracted. Subsequently, they are corrected for acceptance and efficiency losses, and the obtained spectra are then compared to blast-wave-fits, in order to extract the radial expansion velocity β of the system and its kinetic freeze-out temperature Tkin.

The production of nuclei in heavy ion collisions is commonly discussed within two different scenarios: the thermal-statistical model and the coalescence model.

The yields and extracted kinetic freeze out temperature are confronted to the chemical freeze-out temperature Tchem as extracted from statistical model fits to light hadron yields.

This work has been supported by BMBF (05P15RFFCA), GSI and HIC for FAIR.

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