New constraints on Rp violating couplings via susy accompanied neutrino exchange mechanism of neutrinoless double beta decay

We consider beta beta(0 nu) decay induced by light Majorana neutrino exchange between decaying nucleons, accompanied by, in particular, the slepton exchange inside a nucleon. This contribution to beta beta(0 nu) is generated from the R-p, violating terms and the misting of the standard light neutrinos with neutral heavy particles or light sterile neutrinos. To determine the unknown mixing factor Delta, we take into account the four-neutrino model with three ordinary neutrinos and one sterile neutrino. Imposing the current experimental lower half-life limit, a set of constraints on lambda(311)'lambda(123) and lambda(311)'lambda(133) is obtained. Comparing with the limits on the products of the individual bounds on lambda and lambda', we find that the former is stronger while the latter is weaker.