XIIIth International Symposium on Nuclear Symmetry Energy (NuSym25)

A combined constraint on EOS, at high densities, by connecting neutron star observations and the data from heavy ion reactions

11 Sept 2025, 11:10

30m

Auditorium (8F) (Integrated Innovation Building (IIB), RIKEN Kobe Campus)

2. Heavy-ion collision experiments and transport model simulations NuSym Scientific Session

Speaker

Dr Jan Steinheimer-Froschauer (GSI)

Description

I will present a new way to combine constraints on the high density QCD equation of state, from connecting neutron star observations to data from heavy ion reactions at the HADES experiment. In this new setup, the Chiral Mean Field Model, which can describe neutron star and iso-spin symmetric matter, is used for the consistent calculation of the density and momentum dependent potentials of baryons which are then implemented in the UrQMD transport model. In contrast to previous studies, the same equation of state constrained from neutron star properties is also able to describe experimental observables in heavy ion reactions at the HADES experiment. Unlike many other approaches our results are not constraint to densities up to nuclear saturation or perturbative results which allows a continuous description of the equation of state over a large range in baryon density.

Presentation materials

NuSYM_25_steinheimer.pdf