Delta. I =1/2 weak baryon decays

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.157· OSTI ID:6043996

Karlsen, R E; Ryan, W H; Scadron, M D ^[1]

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1. Physics Department, University of Arizona, Tucson, Arizona 85721 (US)

First we extract phenomenological values for the reduced matrix elements {l angle}{ital B}{prime}{vert bar}{ital H}{sub {ital w}}{sup PC}{vert bar}{ital B}{r angle} and {l angle}{ital B}{vert bar}{ital H}{sub {ital w}}{sup PV}{vert bar}{ital D}{r angle} connected with octet-baryon {ital B}{r arrow}{ital B}{prime}{pi},{ital B}{prime}{gamma} weak decays and decuplet decays {ital D}{r arrow}{ital B}{pi}. Then we show at the quark level that the combination of {Delta}{ital I}=1/2 quark {ital W}-exchange and self-energy graphs explains {l angle}{ital B}{prime}{vert bar}{ital H}{sub {ital w}}{sup PC}{vert bar}{ital B}{r angle} transitions better than either separately. However, only the self-energy graph can contribute to {l angle}{Xi}{vert bar}{ital H}{sub {ital w}}{sup PV}{vert bar}{Omega}{r angle}. This overall picture gives an excellent fit to over ten nonleptonic weak baryon decays.

• OSTI ID: 6043996
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 43:1; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
CHARM PARTICLES
CHARMED MESONS
COMPOSITE MODELS
D MESONS
DECAY
ELEMENTARY PARTICLES
ENERGY
FERMIONS
HADRONS
HAMILTONIANS
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MATRIX ELEMENTS
MESONS
P WAVES
PARTIAL WAVES
PARTICLE DECAY
PARTICLE MODELS
PERTURBATION THEORY
PHOTONS
PIONS
PSEUDOSCALAR MESONS
QUANTUM OPERATORS
QUARK MODEL
S WAVES
SELF-ENERGY
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
VACUUM STATES
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY