Speaker
Description
Recently the HADES Collaboration published the data on strangeness production in the medium-abundant Au+Au system at the deeply subthreshold beam energy of 1.23A GeV [1]. The conditions in this system provide a sensitive testing ground for the description of the strangeness dynamics in the nuclear medium. Therefore, several transport approaches were compared to the data, including IQMD, (P)HSD and UrQMD [1,2], and their results will be presented.
First results of the strangeness production in the high-statistics run of Ag+Ag collisions at 1.58A GeV will be also shown.
HADES also provided data on strangeness production from more elementary
p+Nb collisions at 3.5 GeV [3], and $\pi^-$ + C and $\pi^-$ + W collisions at 1.7 GeV/c [4]. These systems permit for testing various scenarios of in-medium potentials of strange hadrons. Some of these tests will be presented in the talk.
The Glauber Monte-Carlo analysis of all the available experimental strangeness results at $\sqrt{s_{NN}} \leq 3$ GeV allowed to obtain the unified systematics of strangeness 4$\pi$ yields in the hadronic sector. The $\langle A_{part} \rangle_b$ dependency of these yields will be also discussed.
[1] J. Adamczewski-Musch et al. (HADES Collaboration), Phys. Lett. B 793, 457 (2019); Phys. Lett. B 778, 403 (2018).
[2] T. Song, L. Tolos, J. Wirth, J. Aichelin, E. Bratkovskaya, Phys. Rev. C 103, 044901 (2021)
[3] G. Agakishiev et al. (HADES Collaboration), Phys. Rev. C 90, 054906 (2014)
[4] S. Maurus, Ph. D. Thesis, Technische Universitaet Muenchen (2019)
