Gießen 2024 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 33: Heavy-Ion Collisions and QCD Phases VII
HK 33.3: Vortrag
Dienstag, 12. März 2024, 18:15–18:30, HBR 62: EG 05
Determining centrality in heavy-ion collisions measured with HADES - A method suitable to compare experimental data and model predictions — •Simon Spies for the HADES collaboration — Goethe-Universität Frankfurt
Centrality is a very important concept for the classification of heavy-ion collisions as it is closely correlated to the amount of nucleons participating in the reaction and therefore the size of the emitting particle source. While in transport models the centrality is perfectly determined by the impact parameter, in experimental data one has to rely on observables like amounts of tracks or detector hits in combination with models to estimate the centrality. Therefore, the centrality classes estimated for experimental data are blurred compared to the actual centrality classes, which results in systematic differences when comparing experimental data with model predictions.
In this contribution we compare the emission of protons and light nuclei from Au+Au collisions at √sNN = 2.42 GeV and Ag+Ag collisions at √sNN = 2.55 GeV measured by HADES to state-of-the art transport model predictions. Therefore, we apply a newly developed method to reproduce the centrality classes estimated for experimental data in models to eliminate potential systematic differences from the definition of the centrality class estimation.
This work has been supported by BMBF (05P21RFFC2), GSI, HFHF and the State of Hesse within the Research Cluster ELEMENTS (Project ID 500/10.006).
Keywords: ELEMENTS; HADES; Heavy-Ion Collisions; Centrality; Model Comparison