Electromagnetic interactions of mesons induced by the axial-vector -- pseudoscalar mixings

TL;DR

This paper investigates how electromagnetic interactions affect meson behavior, revealing deviations from the traditional vector meson dominance model through analysis of axial-vector and pseudoscalar mixings.

Contribution

It demonstrates that diagonalizing axial-vector and pseudoscalar transitions modifies the vector meson dominance picture in the effective meson Lagrangian.

Findings

Deviation from vector meson dominance due to mixing effects

Modification of the effective meson Lagrangian

Detailed analysis of specific examples

Abstract

It is shown that the diagonalization of the axial-vector -- pseudoscalar transitions in the effective meson Lagrangian in presence of electromagnetic interactions leads to a deviation from the vector meson dominance picture which usually arises in the Nambu - Jona-Lasinio model. The essential features of such modification of the theory are studied. Some important examples are considered in detail.