Pseudoscalar electromagnetic vertex function: Quark-hadron duality

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.32.1744· OSTI ID:5299724

Kamal, A N; Chong-Huah, L

A double-dispersion-relation model for the neutral-pseudoscalar-meson--two-photon vertex function is proposed. Several spectral-function sum rules are derived. Quark-hadron duality is established in the model, so that the low-energy behavior of the vertex function is dominated by vector-meson resonances, and the high-energy behavior of the vertex function is determined by QCD dynamics and light-cone algebra. The vertex function is then applied to study the decay processes ..pi../sup 0/(eta/sup 0/)..--> gamma gamma.., ..pi../sup 0/(eta/sup 0/)..-->..e/sup +/e/sup -/(..mu../sup +/..mu.. /sup -/), ..pi../sup 0/(eta/sup 0/)..-->..e/sup +/e/sup -/(..mu../sup +/..mu.. /sup -/)..gamma.., and the scattering process e/sup +/e/sup -/..--> pi../sup 0/(eta/sup 0/)..gamma... .AE

• Research Organization: Department of Physics, Theoretical Physics Institute, University of Alberta, Edmonton, Alberta, Canada T6G 2J1
• OSTI ID: 5299724
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 32:7; 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
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
DECAY
DISPERSION RELATIONS
DUALITY
ELECTROMAGNETIC RADIATION
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
FUNCTIONS
GAMMA RADIATION
HADRONS
INTERACTIONS
IONIZING RADIATIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LIGHT CONE
MASSLESS PARTICLES
MESON RESONANCES
MESONS
MUONS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTONS
PIONS
PIONS NEUTRAL
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
RADIATIONS
RESONANCE PARTICLES
SCATTERING
SPACE-TIME
SUM RULES
VECTOR MESONS
VERTEX FUNCTIONS