9–14 sept. 2024
Caen
Fuseau horaire Europe/Paris

Equation of state in dense nuclear matter controlled by nuclear data

9 sept. 2024, 15:20
30m
GANIL Guest House (Caen)

GANIL Guest House

Caen

Invited Presentation Theory of supernovae and neutron stars, neutron star mergers Theory of supernovae, neutron stars, and neutron star mergers

Orateur

Dr Jerome Margueron (CNRS/IN2P3 - IP2I - Lyon)

Description

I will present two recent analyses of nuclear data, i.e. flow data from heavy ion collision (HIC) and giant monopole resonances (GMR). These data provide constraints to nuclear matter with an equal number of neutrons and protons. To do so, the model for dense nuclear matter equation of state (EoS) is enriched in order to be sensible to properties close to saturation density, i.e. the curvature of the energy per particle represented by the nuclear empirical parameter Ksat, as well as to its properties as the density departs further from saturation density and represented by the skewness parameter Qsat. These two parameters control the density dependence of the EoS for nuclear densities. Employing IQMD to model HIC and a Bayesian approach to confront it to flow data, we find that the EoS is preferred to be soft around saturation density and to stiffen above. In a complementary way, GMR data also prefer soft EoS around saturation density. These recent results advocate for a more systematic use of the Bayesian approach to confront EoS and nuclear data.

Auteur principal

Dr Jerome Margueron (CNRS/IN2P3 - IP2I - Lyon)

Co-auteurs

Betty Tsang (NSCL/Michigan State University) Elias KHAN (IPN Orsay) Prof. Pawel Danielewicz (Michigan State University) Rohit Kumar (Facility for Rare Isotope Beams) william lynch (NSCL/FRIB Dept. of Physics and Astronomy Michigan State Univ.)

Documents de présentation