Speaker
Description
Many-body Green's function theory stands out among microscopic theories for its capability to encapsulate infromation on ground state properties, response and single particle spectroscopy within the same framework. Different aspects of the many-body correlations and dynamics of a given nucleus can then be investigated simultaneously with the same microscopic approach.
The first part of the talk will focus on ongoing work to extend self-consistent Green's function (SCGF) theory to describe pairing effects in the presence of collective excitations--the so called Gorkov-ADC(3) framework [1]--with recent applications to nuclear matter [2]. I will then cover exploitation of diagrammatic Monte Carlo methods [3] for devising first principle optical potentials [4].
The second part of the talk will cover recent results regarding the structure near the Ar and Ca isotopic chains. In particlar, I will further discuss the analysis of a recent GANIL experiment that provided evidence for a charge bubble in 46Ar and linked this to an atypical shell closure at Z=18 and N=28 [5].
[1] C. Barbieri, T. Duguet and V. Somà, Phys. rev. C 105, 044330 (2022).
[2] F. Marino, C. Barbieri, and G. Colò, arXiv:2601.03763 and Phys. Rev. C (2026) in print.
[3] S. Brolli, C. Barbieri and E. Vigezzi, Phys. Rev. Lett. 134, 182502 (2025).
[4] S. Brolli and C. Barbieri, arXiv:2605.30527 (2026).
[5] A. Idini, C. Barbieri and P. Navrátil, Phys. Rev. Lett. 123, 092501 (2019).
[6] D. Brugnara et al., arXiv:2506.23228.