Neutrino masses and mixings in gauge models with spontaneous parity violation

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.23.165· OSTI ID:7093345

Mohapatra, R N; Senjanovic, G

Unified electroweak gauge theories based on the gauge group SU(2)/sub L/ x SU(2)/sub R/ x U(1)/sub B/-L, in which the breakdown of parity invariance is spontaneous, lead most naturally to a massive neutrino. Assuming the neutrino to be a Majorana particle, we show that smallness of its mass can be understood as a result of the observed maximality of parity violation in low-energy weak interactions. This result is shown to be independent of the number of generations and unaffected by renormalization effects. Phenomenological consequences of this model at low energies are studied. Observation of neutrinoless double-..beta.. decay will provide a crucial test of this class of models. Implications for rare decays such as ..mu -->..e..gamma.., ..mu -->..eee-bar, etc. are also noted. It is pointed out that in the realm of neutral-current phenomena, departure from the predictions of the standard model for polarized-electron--hadron scattering, forward-backward asymmetry in e/sup +/e/sup -/..--> mu../sup +/..mu../sup -/, and neutrino interactions has a universal character and may be therefore used as a test of the model.

• Research Organization: Department of Physics, The City College of the City University of New York, New York, New York 10031
• OSTI ID: 7093345
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 23:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BETA DECAY
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HIGGS MODEL
INTERACTIONS
INVARIANCE PRINCIPLES
LEPTON NUMBER
LEPTONS
LIE GROUPS
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRAL-CURRENT INTERACTIONS
NEUTRINOS
P INVARIANCE
PARTICLE INTERACTIONS
PARTICLE MODELS
RENORMALIZATION
REST MASS
SU GROUPS
SU-2 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
V-A THEORY
WEAK INTERACTIONS