Abstract
In this study, the strong coupling constants of vertices , , , , and are analyzed in the framework of QCD sum rules. All possible off-shell cases and the contributions of vacuum condensate terms including , , , , and are considered. The momentum dependent strong coupling constants are first calculated and then fitted into the analytical function , which is extrapolated to time-like regions to obtain the final values of strong coupling constants. The final results are , GeV , , , and GeV . These strong coupling constants are important input parameters that reflect the dynamic properties of the interactions among the mesons and quarkonia.
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