Right-handed-neutrino Majorana mass at the SUSY GUT scale and the solution of the solar-neutrino problem

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.523· OSTI ID:7112517

Lavoura, L ^[1]

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1. Department of Physics, Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

In the SUSY GUT scenario, it is natural to assume the right-handed-neutrino Majorana-mass scale to be 10[sup 16] GeV. This will in principle lead, by the seesaw mechanism, to a [nu][sub [tau]] mass of order [ital m][sub [ital t]][sup 2]/(10[sup 16] GeV)[similar to]3[times]10[sup [minus]3] eV. This suggests that the solution of the solar-neutrino puzzle should be either the MSW effect in [nu][sub [ital e]-][nu][sub [tau]] oscillations, with [ital m][sub [nu][tau]][sup 2][similar to]10[sup [minus]5] eV[sup 2], or long-wavelength [nu][sub [ital e]-][nu][sub [mu]] oscillations, with [ital m][sub [nu][mu]][sup 2][similar to]10[sup [minus]10] eV[sup 2]. These solutions require unexpectedly large mixings of [nu][sub [ital e]] with [nu][sub [tau]] and [nu][sub [mu]], respectively. I suggest a model for the fermion mass matrices which makes almost the same predictions in the charged-fermion sector as the Dimpoulos-Hall-Raby model, but which can accommodate such large lepton mixings.

• DOE Contract Number: FG02-91ER40682
• OSTI ID: 7112517
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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