Neutrinoless double beta decay of deformed nuclei within QRPA with realistic interaction
Abstract
In this paper a microscopic state-of-the-art approach to calculation of the nuclear matrix element M0 for neutrinoless double beta decay with an account for nuclear deformation is presented in length and applied for 76Ge, 150Nd and 160Gd. The proton-neutron quasiparticle random phase approximation (QRPA) with a realistic residual interaction [the Brueckner G matrix derived from the charge-depending Bonn (Bonn-CD) nucleon-nucleon potential] is used as the underlying nuclear structure model. The effects of the short range correlations and the quenching of the axial vector coupling constant gA are analyzed. The results show that neutrinoless double beta decay of 150Nd, to be measured soon by the SNO+ collaboration, provides one of the best probes of the Majorana neutrino mass. This confirms our preliminary conclusion in Ref. Fang10.