Semileptonic baryon decays with a heavy quark

The semileptonic decay of spin-1/2 baryons is examined in the spectator-quark model, with special attention given to {Lambda}{sub {ital b}}{r arrow}{Lambda}{sub {ital c}e}{nu} and {Omega}{sub {ital b}}{r arrow}{Omega}{sub {ital c}e}{nu}. The polarization of the virtual {ital W} and of the daughter b...

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Bibliographic Details
Published in:Physical review. D, Particles and fields Particles and fields, 1991-05, Vol.43 (9), p.2939-2950
Main Author: SINGLETON, R. JR
Format: Article
Language:English
Subjects:
645203 - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
Atomic and molecular physics
BARYONS
Classical and quantum physics: mechanics and fields
COMPOSITE MODELS
DECAY
DISTRIBUTION
Electronic structure of atoms, molecules and their ions: theory
ELEMENTARY PARTICLES
Exact sciences and technology
FERMIONS
FIELD THEORIES
FORM FACTORS
FUNCTIONS
GENERAL RELATIVITY THEORY
General theory of scattering
HADRONS
HELICITY
INVARIANCE PRINCIPLES
KOBAYASHI-MASKAWA MATRIX
LORENTZ INVARIANCE
MASS
MATHEMATICAL MODELS
MATRICES
MATRIX ELEMENTS
Other topics in the theory of the electronic structure of atoms, molecules and their ions
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POLARIZATION
QUARK MODEL
RELATIVITY THEORY
SEMILEPTONIC DECAY
SPIN
UNIFIED-FIELD THEORIES
WAVE FUNCTIONS
WEAK PARTICLE DECAY
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Summary:The semileptonic decay of spin-1/2 baryons is examined in the spectator-quark model, with special attention given to {Lambda}{sub {ital b}}{r arrow}{Lambda}{sub {ital c}e}{nu} and {Omega}{sub {ital b}}{r arrow}{Omega}{sub {ital c}e}{nu}. The polarization of the virtual {ital W} and of the daughter baryon is also considered, along with the joint angular distribution between the charged lepton and the daughter-baryon polarization vector. The {Lambda}{sub {ital b}} decays with about equal mixtures of transverse to longitudinal {ital W} polarization while the {Omega}{sub {ital b}} decays with predominately longitudinal {ital W} polarization. These reactions are representative of two qualitatively different classes: decays involving baryons whose spectators are spin singlets and those whose spectators are spin triplets.
ISSN:0556-2821
1089-4918
DOI:10.1103/PhysRevD.43.2939