New contributions to neutrinoless double-beta decay in supersymmetric theories

In supersymmetric theories with R-parity violation, there are new contributions to neutrinoless double-beta [(ββ${)}_{0\nu }$] decay that do not involve the exchange of Majorana neutrinos. Experimental information on (ββ${)}_{0\nu }$ 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.