MODEL DEPENDENCE OF THE BSW APPROACH

Hadronic model wavefunctions are applied to calculate hadronic matrix elements of decays of D,B mesons in the Bauer-Stech-Wirbel (BSW) appro ach. We have analyzed several different models of valence Fock state w avefunctions, studied their properties and calculated branching ratios of weak decays of D,B mesons. The results show that predictions of th e different wavefunction models can fit most of the present data withi n the errors by choosing reasonable a(1) and a(2). Therefore, for stud ying the model dependence and the reliability of the BSW approach it w ill be helpful to further investigate the factorization of weak proces ses and the hadronic wavefunctions theoretically and to further perfor m more accurate experiment measurements.