The coupling constant g${}_{\rho \sigma \gamma }$ as derived from QCD sum rules

Abstract

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.

10 pages RevTex, 3 postscript figures

References in corpus (5)

• Experimental evidence for a light and broad scalar resonance in $D^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decay
• Correlator of the quark scalar currents and Γ_{tot}(H --> hadrons) at O(α_s^3) in pQCD
• Photoproduction of vector mesons off nucleons near threshold
• QCD Sum-Rule Consistency of Lowest-Lying Quark Scalar Resonances
• The decay ${\rho }^0\to {\pi }^{+}+{\pi }^{-}+\gamma$ and the coupling constant g${}_{\rho \sigma \gamma }$

Cited by in corpus (12)

• Rho meson photoproduction at low energies
• An analysis of f_0-sigma mixing in light cone QCD sum rules
• Thermal QCD Sum Rules for sigma(600) Meson
• Higher meson resonances in $\rho \to {\pi }^0{\pi }^0\gamma$ and $\omega \to {\pi }^0{\pi }^0\gamma$
• g_{rho sigma gamma} coupling constant in light cone QCD
• Scalar form factor of the nucleon and nucleon--scalar meson coupling constant in QCD
• The $\omega \sigma \gamma$-vertex in light cone QCD sum rules
• The $\varphi a_0\gamma$- and $\varphi \sigma \gamma$-vertices in light cone QCD
• The $g_{V\sigma \gamma }$-coupling constants in hadron electrodynamic
• g_a0-rho-gamma and g_f0-rho-gamma coupling constants in three point QCD sum rules
• Investigation of g_f0-rho-gamma and g_a0-rho-gamma coupling constants in light cone sum rules
• Determination of the $g_{\rho \sigma \gamma }$ coupling constant through the process $\gamma +N\to N+V$ with circularly polarized photons