Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Invited Talks IV

HK 34.1: Invited Talk

Wednesday, March 30, 2022, 11:00–11:30, HK-H1

Nuclear equation of state constrained by nuclear physics, microscopic and macroscopic collisions — •Sabrina Huth — Institut für Kernphysik, TU Darmstadt — EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt

Interpreting high-energy, astrophysical phenomena, such as supernova explosions or neutron-star collisions, requires a robust understanding of matter at supranuclear densities. We present new equations of state where the parameter range of the energy-density functional underlying the equation of state is constrained by chiral effective field theory as well as by functional renormalization group computations based on QCD. We implement observational constraints from measurements of heavy neutron stars, the gravitational wave signal of GW170817, and NICER results. Thermal effects are captured by a novel effective mass parametrization. This has been shown to determine the proto-neutron star contraction in supernova simulations.

Additionally, we use Bayesian inference to combine data from astrophysical multi-messenger observations of neutron stars and from heavy-ion collisions with microscopic nuclear theory calculations to improve our understanding of dense matter. Our findings show that constraints from heavy-ion collision experiments show a remarkable consistency with multi-messenger observations and provide complementary information on nuclear matter at intermediate densities.

* This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) * Project-ID 279384907 * SFB 1245.