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PSEUDOSCALAR ELECTROMAGNETIC VERTEX FUNCTION: QUARK HADRON DUALITY

Authors
  • Kamal, A.N.
  • Lo, C.H.
Publication Date
Jan 01, 1985
Identifiers
DOI: 10.1103/PhysRevD.32.1744
OAI: oai:inspirehep.net:216998
Source
INSPIRE-HEP
Keywords
License
Unknown
External links

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 π0(η0)→γγ, π0(η0)→e+e−(μ+μ −), π0(η0)→e+e−(μ+μ −)γ, and the scattering process e+e−→π0(η0)γ.

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