Mainz 2022 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Heavy-Ion Collisions and QCD Phases VI
HK 25.3: Talk
Tuesday, March 29, 2022, 16:45–17:00, HK-H2
Charged Kaon and φ Reconstruction in Ag+Ag Collisions at √sNN = 2.5 GeV with HADES — •Marvin Kohls for the HADES collaboration — Goethe-Universität Frankfurt am Main
Heavy ion collisions in the few GeV energy regime probe similar temperatures and densities as created in neutron stars, which provides a tool to probe the matter created in those macroscopic collisions in earthly laboratories [1].
In March 2019, the HADES collaboration recorded 13 · 109 Ag(1.58A GeV)+Ag events as part of the FAIR Phase-0 program. Within this talk we present the status of the reconstruction of K+, K− and φ from this measurement series.
As these strange hadrons are produced below the free nucleon-nucleon production threshold, they are a good probe for in-medium effects with respect to their steep excitation function. In this presentation the relative yields of strange particles with different excitation energies are compared and the consistency with theoretical models is reviewed. Furthermore the system size dependence of strangeness production is tested by comparing central and peripheral collisions.
The work has been supported by BMBF (05P19RFFCA), the State of Hesse within the Research Cluster ELEMENTS (Project ID 500/10.006), GSI and HIC for FAIR.
[1] Adamczewski-Musch, J., Arnold, O., Behnke, C. et al. Probing dense baryon-rich matter with virtual photons. Nat. Phys. 15, 1040*1045 (2019) doi:10.1038/s41567-019-0583-8