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arXiv · hep-ph/0307245

3+2 neutrinos in a see-saw variation

G. J. Stephenson, Jr.·T. Goldman·B. H. J. McKellar·M. Garbutt
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Abstract

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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G. J. Stephenson, Jr., T. Goldman, B. H. J. McKellar, M. Garbutt. 2003-07-28. 3+2 neutrinos in a see-saw variation. https://arxiv.org/abs/hep-ph/0307245

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