Threefold maximal lepton mixing and the solar and atmospheric neutrino deficits

Details Threefold maximal lepton mixing and the solar and atmospheric neutrino deficits Threefold maximal lepton mixing and the solar and atmospheric neutrino deficits

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phlb..349..137h&link_type=abstract

Physics Letters B, v. 349, p. 137-144

Physics

80

Scientific paper

Threefold maximal mixing would imply a cyclic permutation symmetry among the generations. The data from solar and atmospheric neutrino experiments are consistent with such mixing, and require a hierarchical spectrum of mass-squared differences for the neutrinos. A fit for the two independent mass-squared differences (excluding only the HOMESTAKE solar neutrino result) yields: Δm2 = (0.72 +/- 0.18) × 10-2 eV2 and Δm'2 < 0.9 × 10-11 eV2 at 90% confidence. In the case that the neutrino mass spectrum is qualitatively similar to that of the charged leptons and quarks, these results can be re-expressed in terms of the neutrino masses as follows: m3 ~= 85 +/- 10 meV, and m1, m2 < 3 μeV at 90% confidence. Implications for future experiments are discussed.

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