Application Of The Light-front Holographic Wavefunction For Heavy-light Pseudoscalar Meson In B_d,s?D_d,sP Decays

Heavy favour physics,especially the B meson physics,it is very important for accurating in-spection standard model of particle physics,exploring the origin of CP violation and looking for a indirect signal about new physics.In recent years,it is a a hot and frontier areas for international particle physics research.First of all,it is a sensitive probe to explore new physical effects,especially the B-meson decay.Second,the heavy favour meson decay involves strong,weak and electromagnetic interactions,which can be strictly examined for particle physics theory and related calculation meth-ods,especially perturbation and non-perturbation QCD correction.Once again,the heavy meson system has discovered many strange phenomenas and challenges the current theoretical framework and methods.In theory,for the B meson,its decay amplitude often involves many physical quantities,such as the decay constant,form factor,the distribution amplitude of the meson,etc.These physical observables are all nonperturbative physical quantities.However,It is difficult to deal with nonper-turbative problems based on the first principle from QCD.The treatment of nonperturbative areas is usually use some models,such as lattice QCD?lattice QCD?,QCD sum rules,factorization and so on.In recent years,Professor Brodsky and his collaborators built a theoretical framework of light front holographic QCD based on light front holographic quantization and holographic mapping technology.This theory has been widely used to deal with physical computation in nonperturbative regions.Therefore,we use the light front holographic QCD to calculate the nonperturbative physical quantities involved in the decay process of the B meson and apply it to the correlation analysis.At present,because of B_d,s?DP decay theoretical predictions is much larger than the previous experience.Combining QCDF?QCD factorization?framework and light front holographic QCD framework,we calculate theB_d,s?D_d,sP processes.The former is used to deal the contribution of the QCD hadronic matrix element,and the latter can handle nonperturbative physical quantities.About the specific research we introduce helicity information in the wave function to improve the light front holography theory predicts and discussed the effect of heavy quark pressure solution.We use the decay constant and the pseudoscalar meson as constraint conditions,then analysis X² about holographic parameters.We found that the fit parameter spaces are consistent with by fitting Regge trajectory.After that,under the framework of QCDF,we use the nonperturbative physical quantity as inputs,while taking into account the past neglected power down spectator scattering and annihilation of theB_d,s?D_d,sPdecay processes.Finally,we give the branching fractions.The results show that the contribution of spectator scattering and weak annihilation to the overall branching fractions is ???(-10^-2),which is improved previous theoretical predictions,but still larger than the experimental data.