Zakopane 2026 Conference on Nuclear Physics

We present a systematic study of bulk properties, low-energy spectra, and giant resonances of closed-shell nuclei within an ab-initio renormalized random-phase approximation (RRPA) framework [1,2].

For the first time, modern chiral interactions including explicit three-nucleon forces [3] are implemented consistently within the RRPA approach. The renormalization of the RPA equations removes instabilities associated with the quasiboson approximation, resulting in a stable and internally consistent description of binding energies, radii,
excitation spectra, and electromagnetic responses.

The achieved performance, together with the robustness of the method near shell closures across the nuclear chart, establishes RRPA with modern chiral interactions as a promising and complementary tool for ab initio nuclear structure studies.

[1] F. Knapp, R. Folprecht, G. De Gregorio, P. Veselý, N. Lo Iudice, EPJ Web Conf. 342 01013 (2025).
[2] R. Folprecht, F. Knapp, G. de Gregorio, R. Mancino, P. Veselý, and N. Lo Iudice, Phys. Rev. C 113, L041302 (2026).
[3] T. Miyagi, Eur. Phys. J. A 59, 150 (2023).