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

Details 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

2007-06-03

arxiv.org/abs/0706.0296v4

Nucl.Phys.A796:61-82,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 8 figures, extended version, write the equations in compact form, add more discussions

Scientific paper

10.1016/j.nuclphysa.2007.09.004

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, $\lambda$ and $\beta$ in the heavy quark effective Lagrangian respectively. Our numerical values of the g, $\beta$ and $\lambda$ 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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