Spontaneous R-parity breaking in supergravity solves the solar neutrino problem through matter-enhanced neutrino oscillations. The model may be tested in collider experiments and through ``dynamical'' effects associated with the existence of a weakly interacting majoron. Apart from astrophysical effects, majoron emission can produce observable changes in {μ} and {τ} decay spectra for parameter values that substantially reduce the solar neutrino flux. A signature of the model is the possible observation of the decay {μ}{→}e+majoron.
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Santamaria et al. (1988) studied this question.
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