See-Sawless Neutrino Masses

Details See-Sawless Neutrino Masses See-Sawless Neutrino Masses

1998-03-26

arxiv.org/abs/hep-ph/9803465v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages in RevTex. 2 Postscript figures

Scientific paper

An alternative to the famous see-saw mechanism is proposed to explain the smallness of the neutrino masses (if present). This model involves a fourth family which mixes very little with the other three. It contains one heavy neutrino (mN > mZ /2) and three very light neutrinos whose masses are radiatively induced. In contrast with the see-saw mechanism, all neutrino masses are Dirac masses. In one particular scenario, the three light neutrinos are almost degenerate in mass and are found to be consistent with fits to the Solar and Atmospheric neutrino deficits. They might even account for the Hot Dark Matter.

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