Nuclear transition matrix elements for Majoron-accompanied neutrinoless double- β decay within a projected-Hartree-Fock-Bogoliubov model

Abstract

The model-dependent uncertainties in the nuclear transition matrix elements for the Majoron-accompanied neutrinoless double-β decay (0+ → 0+transition) of 94,96Zr, 100Mo, 128,130Te, and 150Nd isotopes are calculated by employing the projected-Hartree-Fock-Bogoliubov formalism with four different parametrizations of the pairing plus multipolar two-body interactions and three different parametrizations of the Jastrow short-range correlations. Uncertainties in the nuclear transition matrix elements turn out to be less than 15% and 21% for decays involving the emission of single and double Majorons, respectively