Threshold effects on the mass-scale predictions in SO(10) models and solar-neutrino puzzle

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.264· OSTI ID:6899125

Mohapatra, R N; Parida, M K ^[1]

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1. Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)

We compute the threshold uncertainties due to unknown masses of the Higgs bosons on the predictions for the intermediate and unification scales, [ital M][sub [ital I]] and [ital M][sub [ital U]], respectively, in SO(10) models. We focus on models with separate breaking scales for parity and SU(2)[sub [ital R]] symmetries since they provide a natural realization of the seesaw mechanism for neutrino masses. For the two-step symmetry-breaking chains, where left-right-symmetric gauge groups appear at the intermediate scale, we find that parity invariance of the theory at the unification scale drastically reduces the grand-unification-theory (GUT) threshold effects in some cases. Including the effects of the intermediate-scale thresholds, we compute the uncertainty in the above mass scales and study their implications for proton lifetime and neutrino masses. An important outcome of our analysis is that if the Mikheyev-Smirnov-Wolfenstein (MSW) solution to the solar-neutrino puzzle is accepted at the 1[sigma] level, it rules out SU(2)[sub [ital L]][times]SU(2)[sub [ital R]][times]U(1)[sub [ital B][minus][ital L]][times]SU(3)[sub [ital c]] as an intermediate symmetry for SO(10) breaking whereas the intermediate symmetry SU(2)[sub [ital L]][times]SU(2)[sub [ital R]][times]SU(4)[sub [ital c]] is quite consistent with it.

• OSTI ID: 6899125
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 47:1; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SOLAR NEUTRINOS
MASS SPECTRA
COUPLING CONSTANTS
GRAND UNIFIED THEORY
HIGGS BOSONS
LIFETIME
P INVARIANCE
PARITY
PROTONS
SO GROUPS
STANDARD MODEL
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
THRESHOLD ENERGY
U-1 GROUPS
BARYONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FIELD THEORIES
HADRONS
INVARIANCE PRINCIPLES
LEPTONS
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINOS
NUCLEONS
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
RADIATIONS
SOLAR PARTICLES
SOLAR RADIATION
SPECTRA
STELLAR RADIATION
SU GROUPS
SYMMETRY GROUPS
U GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
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