Eur. Phys. J. C 24, 117-120 (2002)
https://doi.org/10.1007/s100520200934

The coupling constants g_ρπγ and g_ωπγ as derived from QCD sum rules

Physics Department, Middle East Technical University, 06531 Ankara, Turkey

Corresponding authors: ^a agokalp@metu.edu.tr - ^b oyilmaz@metu.edu.tr

Received: 12 October 2001
Revised: 28 December 2001
Published online: 5 April 2002

Abstract

We employ QCD sum rules to calculate the coupling constants g_ρπγ and g_ωπγ by studying the three point ρπγ and ωπγ correlation functions. Our results are in good agreement with the coupling constants g_ρπγ and g_ωπγ that are deduced utilizing the experimentally measured values of the Γ(ρ⁰ → π⁰γ) and Γ(ω → π⁰γ) decay widths.