Eur. Phys. J. C (2007) 52: 553-560
https://doi.org/10.1140/epjc/s10052-007-0404-6

Regular Article - Theoretical Physics

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

Department of Physics, North China Electric Power University, Baoding, 071003, P.R. China

^* e-mail: wangzgyiti@yahoo.com.cn

Received: 25 May 2007
Revised: 10 August 2007
Accepted: 10 August 2007
Published online: 11 September 2007

Abstract

In this article, we study the vertices DDV and D^*DV with the light-cone QCD sum rules. The strong coupling constants g_DDV and f_D*DV play an important role in understanding the final-state re-scattering effects in the hadronic B decays. They are related to the basic parameters β and λ respectively in the heavy quark effective Lagrangian; our numerical values are smaller than the existing estimations.