An overview on the nuclear equation of state studied from ground and collective excited state properties of nuclei

by Prof. Xavier Roca Maza (University of Milan and INFN)

Wednesday 12 Apr 2023, 13:30 → 15:00 Asia/Tokyo

=Date and Place=

Apr. 12th (Wed) 2023  , 13:30~ via Hybrid  (Zoom + RIBF hall)

=Lecturer=

Professor Xavier Roca-Maza(Università degli Studi di Milano and INFN sezione di Milano)

=Title=

An overview on the nuclear equation of state studied from ground and collective excited state properties of nuclei

=Abstract=

This contribution reviews a selection of available constraints to the nuclear equation of state (EoS) around saturation density from nuclear structure calculations on ground and collective excited state properties of atomic nuclei [1]. It concentrates on predictions based on self-consistent mean-field calculations, which can be considered as an approximate realization of an exact energy density functional (EDF). Mostly, EDFs are currently derived from effective interactions commonly fitted to nuclear masses, charge radii and, in many cases, also to pseudo-data such as nuclear matter properties. Although in a model dependent way, EDFs constitute nowadays a unique tool to reliably and consistently access bulk ground state and collective excited state properties of atomic nuclei along the nuclear chart as well as the EoS. The impact on the EoSof the new CREx[2] and PREx[3] measurmentsof the parity violating asymmetry (ground state observable) in 48Ca and 208Pb, respectively, will be also discussed [4,5] andcompared to previously presented results on collective excitations. As the main conclusion, the isospin dependence of the nuclear EoSaround saturation density and, to a lesser extent, the nuclear matter incompressibility remain to be accurately determined. Experimental and theoretical efforts in finding and measuring observables specially sensitive to the EoSproperties are of paramount importance, not only for low-energy nuclear physics but also for nuclear astrophysics applications.

References

[1] X. Roca-Maza, N. Paar, Progress in Particle and Nuclear Physics, 101 (2018) 96-176.

[2] D. Adhikari et al. (CRExcollaboration), Phys. Rev. Lett. 129, 042501 (2022).

[3] S. Abrahamyanet al. (HAPPEX and PREX Collaborations) Phys. Rev. Lett. 109, 192501 (2012).

[4] Paul-Gerhard Reinhard, Xavier Roca-Maza, Witold Nazarewicz, Phys. Rev. Lett. 127, 232501 (2021).

[5] Paul-Gerhard Reinhard, Xavier Roca-Maza, Witold Nazarewicz, Phys. Rev. Lett. 129, 232501 (2022).

20230412RIBF semiPoster-319.pdf