Mass or Gravitationally Induced Neutrino Oscillations? -- A Comparison of B Neutrino Flux Spectra in a Three--Generation Framework

Both gravitational and mass induced neutrino oscillation mechanisms provide possible resolutions to the Solar Neutrino Problem. The distinguishing feature between the two mechanisms is their dependence on the neutrino energy. We investigate the implications of this by computing the $\B$ neutrino spectrum as determined from each mechanism using a realistic three--flavor evolution model. We find that in the limit of small $\tetau$ mixing angle, the differences are significant enough to observe in future solar neutrino experiments.