Right-handed-neutrino Majorana mass at the SUSY GUT scale and the solution of the solar-neutrino problem
Right-handed-neutrino Majorana mass at the SUSY GUT scale and the solution of the solar-neutrino problem
In the SUSY GUT scenario, it is natural to assume the right-handed-neutrino Majorana-mass scale to be ${10}^{16}$ GeV. This will in principle lead, by the seesaw mechanism, to a ${\ensuremath{\nu}}_{\mathrm{\ensuremath{\tau}}}$ mass of order ${\mathit{m}}_{\mathit{t}}^{2}$/(${10}^{16}$ GeV)\ensuremath{\sim}3\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$ eV. This suggests that the solution of the solar-neutrino puzzle should be either the MSW …