用光锥QCD求和规则分析顶点D^*D^* P，D^* DV和DDV
Analysis of the vertices D^*D^* P, D^*D V and DDV with light-cone QCD sum rules
摘要：
本文利用光锥QCD求和规则研究了顶点$D^*D^*P$、$D^*DV$和DDV。强耦合常数g_{D^*D^*P}、g_{D^*DP}、f_{D^*DV}、f_{D^*D^*V}、g_{DDV}和g_{D^*D^*V}在理解强子B衰变的末态相互作用中起着重要作用。它们分别与重夸克有效拉格朗日量中的基本参数g、$λ$和$β$有关。我们的数值的g，$β$和$λ$是远远小于大多数现有的估计。如果光锥QCD求和规则的预言是可靠的，那么在强子B衰变中，末态相互作用效应可能被高估。
英文摘要：
In this article, we study the vertices $D^*D^*P$, $D^*DV$ and DDV with the light-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 in understanding the final-state interactions in the hadronic B decays. They relate to the basic parameters g, $λ$ and $β$ in the heavy quark effective Lagrangian respectively. Our numerical values of the g, $β$ and $λ$ are much smaller than most of the existing estimations. If the predictions from the light-cone QCD sum rules are robust, the final-state interaction effects maybe overestimated in the hadronic B decays.
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