Neutrino masses in supersymmetry: R-parity and leptogenesis

Ernest Ma, Martti Raidal, Utpal Sarkar
1999 Physics Letters B  
In the supersymmetric standard model of particle interactions, R-parity nonconservation is often invoked to obtain nonzero neutrino masses. We point out here that such interactions of the supersymmetric particles would erase any pre-existing lepton or baryon asymmetry of the universe before the electroweak phase transition through the $B + L$ violating sphaleron processes. We then show how neutrino masses may be obtained in supersymmetry (assuming R-parity conservation) together with successful
more » ... her with successful leptogenesis and predict the possible existence of new observable particles.
doi:10.1016/s0370-2693(99)00755-8 fatcat:dyhckydizffxdafwlgssmya5fe