The coupling constant g_(rhoσγ) as derived from QCD sum rules
classification
✦ hep-ph
keywords
constantcouplinggammasigmarulescalculateconsistentcorrelation
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We employ QCD sum rules to calculate the coupling constant g$_{\rho\sigma\gamma}$ by studying the three point ${\rho\sigma\gamma}$-correlation function. Our results is consistent with the value of this coupling constant obtained using vector meson dominance of the electromagnetic current and the experimental $\rho^0$-photoproduction data.
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