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In supersymmetric theories with R-parity violation, there are new contributions to neutrinoless double-beta () ₀ decay that do not involve the exchange of Majorana neutrinos. Experimental information on () ₀ decay can therefore be used to constrain parameters of supersymmetric theories. We also discuss neutrino mass in these theories. We then discuss how R-parity-violating interactions can be induced in the low-energy sector of a theory that respects R-parity conservation prior to symmetry breaking.
Rabindra N. Mohapatra (Mon,) studied this question.