Pseudoscalar Electromagnetic Vertex Function - Quark-Hadron Duality
Journal
Physical Review D
Journal Volume
32
Journal Issue
7
Pages
1744-1754
Date Issued
1985
Author(s)
Kamal, An
Abstract
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 0(0), 0(0)e+e-(+-), 0(0)e+e-(+-), and the scattering process e+e-0(0). © 1985 The American Physical Society.
SDGs
Type
journal article