Natural seesaw mechanism, eV-keV-MeV-type neutrino spectrum, and cosmology

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.38.2226· OSTI ID:6832939

Mohapatra, R N; Pal, P B

We show that in left-right-symmetric models one can have m/sub v//sub e/:m/sub v//sub ..mu../:m/sub v//sub tau/approx. =eV:KeV:MeV without any fine-tuning of parameters. The ..nu../sub ..mu../ and ..nu../sub tau/ decay via Majoron emission with lifetimes short enough to avoid cosmological constraints. The key ingredient of the model is the breaking of D parity, present in SO(10), at a scale much higher than the scale of SU(2)/sub R/ breaking. Using the Fritzsch ansatz for up-quark mass matrices and a diagonal form for the heavy neutrino masses, we predict m/sub t/<53 GeV, 2.3 TeV//sub R//sub =/<10 TeV, and m/sub ..nu..//sub >//sub e//sub =/greater than or equal to0.2 eV.

• Research Organization: Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6832939
• Journal Information: Phys. Rev. D; (United States), Vol. 38:7
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
NEUTRINOS
DECAY
MASS SPECTRA
HIGGS MODEL
LEPTONS
LIFETIME
MATRIX ELEMENTS
POTENTIALS
QUARKS
SO-10 GROUPS
SU-2 GROUPS
SYMMETRY BREAKING
UNIVERSE
ELEMENTARY PARTICLES
FERMIONS
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
SO GROUPS
SPECTRA
SU GROUPS
SYMMETRY GROUPS
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