New contributions to supersymmetric mechanism of neutrinoless double beta decay

The neutrinoless double beta (0νββ) decay is analyzed within the Minimal Supersymmetric Standard Model with explicit R-parity violation (). We have found new supersymmetric contributions to this process and give the complete set of relevant Feynman diagrams. Operators describing 0+ → 0+ nuclear transitions induced by the supersymmetric interactions of the are derived. These operators can be used for calculating the 0νββ decay rate applying any specific nuclear model wave functions.