QCD sum rule analysis of the coupling constants g_{ρηγ} and g_{ωηγ}

Abstract

The coupling constants g${}_{\rho \eta \gamma }$ and g${}_{\omega \eta \gamma }$ are calculated using QCD sum rules method by studying the three point $\rho \eta \gamma$ and $\omega \eta \gamma$ correlation functions. A comparison of the results with the values of the coupling constants that are deduced from the experimentally measured decay widths of $\rho \to \eta \gamma$ and $\omega \to \eta \gamma$ decays is performed.

8 LateX pages, 5 ps figures