Towards a parameter-free calculation of the nuclear matrix element for the neutrinoless double-beta decay

by Dr Coraggio Luigi (INFN-NA)

Thursday 9 Mar 2017, 14:30 → 15:30 Europe/Rome

0M03 (Dip. di Fisica di Napoli)

I will report about the calculation of Gamow-Teller and double-beta decay properties for nuclei around 132Sn within the framework of the realistic shell model. The effective shell-model hamiltonian and Gamow-Teller transition operator are derived by way of many-body perturbation theory, without resorting to empirical effective quenching factors for the g_A coupling constant. The results are then compared with the available experimental data, in order to establish the reliability of our approach. This is a mandatory step, before we apply the same methodology, in forthcoming studies, to the calculation of the neutrinoless double-beta decay nuclear matrix element for nuclei that are currently considered among the best candidates for the detection of this process in experiments, such as CUORE, currently running at INFN National Laboratory at Gran Sasso.

Slides Coraggio.pdf