Abstract: 

In this talk I will present a new project that we are starting together with the University of Caen and the University of Milano-Bicocca. The aim of the project is to build an Equation of State (EoS) for neutron star merger simulations. Specifically, in my presentation, I will focus on the motivation of the first part of the project that consists in building a reliable EoS up to about two times nuclear saturation density (ρ₀). For that purpose, the development of new nuclear effective models is instrumental. State-of-the-art nuclear physics models used as input for neutron star merger simulations nowadays are not able to describe at the same time the electric nuclear dipole polarizability and the parity violating asymmetry recently measured in different nuclei [1,2]. The connection of these two observables with specific properties of the neutron matter EoS will be discussed and current results will be presented. As a conclusion, a nuclear physics theoretical effort is needed in the near future not only for nuclear structure and reaction studies but also for reliable applications in nuclear astrophysics.

[1] Information content of the parity-violating asymmetry in 208Pb P.-G. Reinhard, X. Roca-Maza, W. Nazarewicz, Phys. Rev. Lett. 127 232501 (2021)
[2] Combined theoretical analysis of the parity-violating asymmetry for 48Ca and 208Pb, P.-G. Reinhard, X. Roca-Maza, W. Nazarewicz, Phys. Rev. Lett. (2022) – Accepted