The Solar Neutrino Puzzle: An Oscillation Solution with Maximal Neutrino   Mixing
  If, as suggested by the SuperKamiokande results, the mu neutrino and tau neutrino are maximally and ``rapidly'' mixed, this alone determines the mapping from current to mass eigenstates up to one rotation angle (theta) mixing the electron neutrino ``more slowly'', with an equal combination of the mu neutrino and tau neutrino. For sin 2 theta = 1, the resulting minimal number of free parameters, yet maximal mixing, shows agreement between extant observations of solar neutrinos and predictions by the standard solar model with minor modifications. 
Anthony J. Baltz (BNL), Alfred Scharff Goldhaber (SUNY, Stony Brook),   and Maurice Goldhaber (BNL)