3+2 neutrinos in a see-saw variation

Details 3+2 neutrinos in a see-saw variation 3+2 neutrinos in a see-saw variation

2003-07-18

arxiv.org/abs/hep-ph/0307245v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

17pp., 1 fig., revtex4; typo corrected in Table

Scientific paper

If the sterile neutrino mass matrix in an otherwise conventional see-saw model has a rank less than the number of flavors, it is possible to produce pseudo-Dirac neutrinos. For the rank 1 case, 3+2 scenarios devolve naturally, as we show by example. Additionally, we find that the lower rank see-saw suppresses some mass differences, so that small mass differences do not require that the individual masses of each neutrino must also be small.

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