An improved model of the neutrinoless double-beta decay. HM-results for 76Ge and a reanalysis of CUORICINO data for 130Te

Abstract

A model of a neutrinoless 2\b{eta}-decay was proposed which predicted a shift of the 2\b{eta}0{\nu}-signal from the Q value (2\b{eta}-decay energy). The shifts were calculated for 76Ge ({\Delta}E=-2.6 keV), 100Mo ({\Delta}E=-4.7 keV), 130Te ({\Delta}E=-3.7 keV). An appearance of the shifts was explained by an excitation of atomic shells of the product atom, with the following de-excitation by emission of X-rays. A virtual excitation of the product nuclei was supposed in an addition to exchange with a virtual neutrino between the two decaying neutrons. A comparison with the H-M and Cuoricino data has strongly supported the validity of the proposed model. It pointed out also that the 2\b{eta}0{\nu}-decay has been experimentally observed ten years ago.