A Mass Matrix for Atmospheric, Solar, and LSND Neutrino Oscillations

Details A Mass Matrix for Atmospheric, Solar, and LSND Neutrino Oscillations A Mass Matrix for Atmospheric, Solar, and LSND Neutrino Oscillations

1999-09-08

arxiv.org/abs/hep-ph/9909293v3

Phys.Rev.D62:013003,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 0 figures, minor text changes

Scientific paper

10.1103/PhysRevD.62.013003

We construct a mass matrix for the four neutrino flavors, three active and one sterile, needed to fit oscillations in all three neutrino experiments: atmospheric, solar, and LSND, simultaneously. It organizes the neutrinos into two doublets whose central values are about 1 eV apart, and whose splittings are of the order of 10^(-3) eV. Atmospheric neutrino oscillations are described as maximal mixing within the upper doublet, and solar as the same within the lower doublet. Then LSND is a weak transition from one doublet to the other. We comment on the Majorana versus Dirac nature of the active neutrinos and show that our mass matrix can be derived from an S_2 x S_2 permutation symmetry plus an equal splitting rule.

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