Neutrinoless double beta 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 renormal ized quasiparticle random phase approximation (SRQRPA) is presented. The co ntribution from the momentum-dependent induced nucleon currents to 0 nu bet a beta -decay amplitude is taken into account. A detailed nuclear structure study includes the discussion of the sensitivity of the obtained SRQRPA re sults for 0 nu beta beta decay of Ge-76 to the parameters of nuclear Hamilt onian. two-nucleon short-range correlations. and the truncation of the mode l space. A comparison with the standard and renormalized QRPA results is pr esented. We have found a considerable reduction of the SRQRPA nuclear matri x elements, resulting in less stringent limits for the effective neutrino m ass.