Study On Nonleptonic Decays Within QCD Factorization Framework

In this paper,we study on the B meson two-body nonleptonic decays and the the power suppressed corrections with the QCD factorization approach.Firstly,the knowledge of Standard Model and B Physics are briefly presented.And we give a review of the basic theoretical tools,especially the calculation for the hadronic matrix elements.Moreover,the applications of QCD factorization in B meson two-body nonleptonic decays are introduced in detail.Secondly,the power suppressed transverse amplitudes in Bc?J/?V and Bc*??cV weak decays are first evaluated to QCD next-to-leading order as well as the longitudinal amplitudes,and the predictions for the observables are presented.And then,we exam the the power suppressed corrections from B meson distribution amplitudes which contribute to B?PP progress(P denotes the pseudoscalar meson).Finally,motivated by the decays Bs0? K0*(1430)±K(?)and Bs0?K0*(1430)0K0 observed for the first time by LHCb collaboration,we give a research on Bs0?K0*(1430)P(P=K,?)decays,which involve a scalar meson in final state.As well as the predictions on branching ratios and CP asymmetry have been shown.In conclusion,the results in this paper are summarized as follow:·For Bc?J/?V and B*c??cV weak decays,the full form of the transverse amplitudes are given for the first time.It is find that these decays are dominated by the longitudinal polarization,but the power-suppressed transverse corrections account for over 10%of the whole contribution and therefore are un-negligible.In addition,we suggest direct measurements on some useful ratios,RK*/?(?=0)and RK*/?(?=0),which are very suitable to test the consistence between theoretical prediction and data because their theoretical uncertainties can be well controlled.·The power suppressed ?B2 part contribute to only the nonfactorizable weak annihilation amplitudes,and the part related to ?B1 not only contribute to the nonfactorizable weak annihilation amplitudes but also offer a small effect to the hard spectator scattering amplitudes.Even the contributions are small,the participation of ?B2 plays a positive role in accommodating the pure weak annihilation decays Bd?K+K-and Bs??+?-to data with the universal annihilation parameters ?A and ?A.Otherwise,the contributions from power suppressed ?B1 part are larger,but it do not have a positive effect on explaining the large branching ratios in pure annihilation decays.Thus,to deeply comprehend the large branching ratios in pure annihilation decays,more theoretical efforts should be made in the future.·Employing the QCD factorization approach,we calculate the Bs0?K0*(1430)P(P=K,?)progresses,and the predictions for the observables are first presented.It is find that the predictions for the branching ratios of Bs0?K0*(1430)±K(?)and Bs0±K0*(1430)0K0 decays are coincident with the experiment data within the errors.Some of the predictions for Bs0?K0*(1430)±?(?)and Bs0?K0*(1430)0?0 decays can hopefully be measured at Belle-? and the upgraded LHCb ? detector in the future.