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In this article, we study the vertices $D^*D^*P$, $D^*DV$ and DDV with thelight-cone QCD sum rules. The strong coupling constants g_{D^*D^*P}, g_{D^*DP},f_{D^*DV}, f_{D^*D^*V}, g_{DDV} and g_{D^*D^*V} play an important role inunderstanding the final-state interactions in the hadronic B decays. Theyrelate to the basic parameters g, $\lambda$ and $\beta$ in the heavy quarkeffective Lagrangian respectively. Our numerical values of the g, $\beta$ and$\lambda$ are much smaller than most of the existing estimations. If thepredictions from the light-cone QCD sum rules are robust, the final-stateinteraction effects maybe overestimated in the hadronic B decays.

Analysis of the vertices D^*D^* P, D^*D V and DDV with light-cone QCD sum rules

Analysis of the vertices D^D^ P, D^*D V and DDV with light-cone QCD sum rules