Lepton-number violation with quasi-Dirac neutrinos

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.28.540· OSTI ID:5886359

Valle, J W.F.; Singer, M

We investigate lepton-number violation in weak interactions with massive Dirac neutrinos. In the framework of a simple SU(3)/sub L/ x U(1) electroweak model we find that neutrinos naturally acquire only Dirac masses at tree level, and for an odd number of lepton families, one neutrino remains massless. After a spontaneous breakdown of symmetry we find that the SU(2) x U(1) effective theory has lepton-number-violating currents which couple to the standard gauge bosons. Flavor-conserving Vertical Bar..delta..lVertical Bar = 2 processes such as neutrinoless double-..beta.. decay are forbidden in the simplest model, but processes such as ..mu../sup -/+(A,Z)..-->..e/sup +/+(A,Z-2) and K/sup -/..--> pi../sup +/e/sup -/..mu../sup -/ are allowed.

• Research Organization: Theory Division, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, United Kingdom OX11, 0QX
• OSTI ID: 5886359
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 28:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645302* -- High Energy Physics-- Particle Invariance Principles & Symmetries-- Applications to Electromagnetic & Weak Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BETA DECAY
BOSONS
COMPOSITE MODELS
CONSERVATION LAWS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
HADRONS
INTERACTIONS
KAONS
KAONS MINUS
LEPTON NUMBER
LEPTONS
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
MUONS
MUONS MINUS
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PIONS
PIONS PLUS
PSEUDOSCALAR MESONS
QUARK MODEL
SEMILEPTONIC DECAY
STRANGE PARTICLES
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED-FIELD THEORIES
WEAK INTERACTIONS
WEAK PARTICLE DECAY