Abstract
Spontaneous R-parity breaking is investigated in a supersymmetric majoron model, where the superfields of antineutrinos and an L = 2 singlet are added to the minimal supersymmetric standard model. The analysis is made by considering the effects of renormalization group evolution of the coupling parameters. It is found that for a certain region of the initial parameters at some unification scale, e.g. ∼ 1016 GeV, the desired values of the coupling parameters are reproduced at the electroweak scale ∼ 100 GeV to cause spontaneous R-parity breaking. The masses and decays of the light neutrinos are also examined briefly.
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