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HK: Fachverband Physik der Hadronen und Kerne

HK 9: Heavy-Ion Collisions and QCD Phases II

HK 9.4: Talk

Monday, March 11, 2024, 17:45–18:00, HBR 62: EG 05

Macroscopic description of HADES Au+Au and Ag+Ag particle yields using the HRG model — •Marvin Kohls for the HADES collaboration — Goethe-Universität Frankfurt

A comparison of strange hadron production yields in Au(1.23 AGeV)+Au and Ag(1.58 A GeV)+Ag collisions, measured with HADES, reveals a universal scaling behavior as a function of the system size. Together with the apparent observation of a melting ρ-meson, these findings hint towards the possibility of describing matter properties with thermal/statistical parameters extracted from a hadron resonance gas (HRG).

In this contribution, we will systematically compare measured particle yields to HRG fits. Particular emphasis will be placed on elucidating the characteristics of light nuclei and their excited states. Furthermore, the canonical description of strangeness, in particular the production rates of K⁻, φ (1020), and Ξ⁻, will be discussed.

This work has been supported by BMBF (05P21RFFC2), GSI and HFHF.

Keywords: HADES; Heavy Ion Collisions; SIS18; Hadron Resonance Gas