Neutrinoless double β decay within the self-consistent renormalized quasiparticle random phase approximation and inclusion of induced nucleon currents -: art. no. 051301

The first calculation (to our knowledge) of neutrinoless double beta decay (0 nu beta beta -decay) matrix elements within the self-consistent renormalized quasiparticle random phase approximation (SRQRPA) is presented. The contribution from the momentum-dependent induced nucleon currents to 0 nu beta beta -decay amplitude is taken into account. A detailed nuclear structure study includes the discussion of the sensitivity of the obtained SRQRPA results for 0 nu beta beta decay of Ge-76 to the parameters of nuclear Hamiltonian. two-nucleon short-range correlations. and the truncation of the model space. A comparison with the standard and renormalized QRPA results is presented. We have found a considerable reduction of the SRQRPA nuclear matrix elements, resulting in less stringent limits for the effective neutrino mass.