Test of physics beyond the standard model in nuclei

The problem on violation of the lepton number of rare nuclear processes, in particular the 0νββ-decay, which has a high potential for provision of important information on the particles physics, is discussed. It is shown that the 0νββ-decay effects the physics beyond the standard model limits, violating thereby the parameters of other theories. The mechanism of the lepton number violations is discussed in the problem on the neutron mixing and violation of the R-parity of the SUSY extension of the standard model. The relevant violation of the lepton number effectively influences the Majorana neutrino mass (mν), the right handed weak-interaction parameters (λ and η), the Majorana effective coupling constant (g) and the first violation of the trilinear R-parity SUSY interaction (λ111). The violation of the lepton numbers for the 76Ge, 128Te, 82Se, 96Zr, 100 Mo, 116Cd, 130Te, 150Nd, 136Xe, 76Ge nuclei are presented