Giovanni De Gregorio, "Recent developments in beta decay studies within the nuclear shell model"

Wednesday 21 Feb 2024, 16:00 → 17:00 Europe/Rome

2G26

The necessity of calculating reliable nuclear matrix elements for neutrinoless double beta decay has  further stimulated the research on the mechanisms responsible for the renormalization of the beta-decay operator.  We approach this problem starting from a nuclear Hamiltonian and electroweak currents derived consistently  by way of the chiral perturbation theory, and adopt the many-body perturbation theory to derive effective Hamiltonian and operators for nuclear shell model calculations. I will present recent results obtained for medium-mass nuclei and discuss  the contribution of both electroweak currents and many-body correlations to the quenching of the axial coupling constant gA.