Accomodating Solar and Atmospheric Neutrino Deficits, Hot Dark Matter, and a Double Beta Decay Signal

Details Accomodating Solar and Atmospheric Neutrino Deficits, Hot Dark Matter, and a Double Beta Decay Signal Accomodating Solar and Atmospheric Neutrino Deficits, Hot Dark Matter, and a Double Beta Decay Signal

1994-02-04

arxiv.org/abs/hep-ph/9402231v2

Phys.Rev. D50 (1994) 3477-3483

Physics

High Energy Physics

High Energy Physics - Phenomenology

UCSB-HEP-94-03 and UMD-PP-94-90; { Tex File; 14 pages } (File jnl.tex included and minor misprints corrected.)

Scientific paper

10.1103/PhysRevD.50.3477

Neutrino mass explanations of the solar and atmospheric neutrino deficits and a hot dark matter component require one of three patterns of those masses, as already pointed out by us. Recently there have been indications of a non-vanishing amplitude for neutrinoless double beta decay. If this additional hint of neutrino mass is true, it would make even less likely the one unfavored pattern (a sterile neutrino giving warm, rather than hot dark matter), would alter another by making the $\nu_e$ a contributor to the hot dark matter, and would make the third ($\nu_e$, $\nu_\mu$, and $\nu_\tau$ approximately degenerate) much more likely than previously. For this third case we construct a gauge model consistent with other weak interaction data. This model utilizes a more general version of the see-saw mechanism, which is very likely to be the source of neutrino mass, if this degenerate pattern is correct. A new supernova constraint is utilized, and implications and tests of the different mass matrices are noted.

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