LAUSR

With the potential for the improvements of measurement precision, the refinement of theoretical calculation on hadronic B weak decays is necessary. In this paper, we study the contributions of B mesonic distribution amplitude \({\Phi }_{B2}\) within the QCD factorization approach, and find that \({\Phi }_{B2}\) contributes to only the nonfactorizable annihilation amplitudes for the B \({\rightarrow }\) PP decays (P denotes the ground SU(3) pseudoscalar mesons). Although small, the \({\Phi }_{B2}\) contributions might be helpful for improving the performance of the QCD factorization approach, especially for the pure annihilation \(B_{d}\) \({\rightarrow }\) \(K^{+}K^{-}\) and \(B_{s}\) \({\rightarrow }\) \({\pi }^{+}{\pi }^{-}\) decays.