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The coupling constants g_{ρπγ} and g_{ωπγ} as derived from QCD sum rules}

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 for the decay widths $Γ(ρ^0\to π^0γ)$ and $Γ(ω\to π^0γ)$ calculated using the obtained coupling constants are in good agreement with the experimental values of these decay widths.

preprint2001arXivOpen access
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