Study Of The (?) Two-body Nonleptonic Weak Decays With PQCD Approach

With the performance of the two B-factories Belle and Babar experiments,the B meson physics have made great achievements in both theory and experiment,for example,almost all the Bu,d weak decay modes with branching ratio of over 10^-6 have been measured with high precision.The vector meson B_q* and the pseudoscalar meson B_q have the same flavor components????q?,with q =u,d,s.Compared with the B meson weak decays,the study of the B*meson is very few.The main reason is that the B*meson data is less.Experiment ally,with the running LHC and the forthcoming SuperKEKB,it is expected to accumulate more B*meson data samples,which provide a possibility of the study of B*meson weak decays.The studies of B_q* meson weak decay provide the useful information for the B_q meson weak decays,validate the approaches for the hadronic matrix elements,and playing an important role in determining the parameters of the phenomenological models,testing the SM and searching for potential new physics.Among the studies of B_q* weak decay physics,the branching ratio for the nonleptonic weak decays ????D_qM are relatively large,because these decays are induced by the b ? c transition at the quark level and hence can be used to extract the CKM matrix element |V+)cb_|.Thus,in this paper we study the B* meson two-body nonleptonic weak decays with the perturbation QCD approach,calculate the amplitudes and branching ratios for ????DM decays,in order to provide reference for future experiments.First,this paper introduces the basic content of the standard model and the basic theory of B physics.Then,we focus on the Phenomenological model perturbation QCD.Finally,the branching ratios for the ????DP,DV decays are given.We find that the ????D_q?^- decays have the branching ratio ???10^-9 and should be promisingly first accessible at the high luminosity experiments in the near future.