Phenomenological analysis ofB→PPdecays with QCD factorization

In this paper, we study nonleptonic charmless B decays to two light pseudoscalar mesons within the frame of QCD factorization, including the contributions from the chirally enhanced power corrections and weak annihilation. Predictions for the $\mathrm{CP}$-averaged branching ratios and $\mathrm{CP}$-violating asymmetries are given. Within the reasonable range of the parameters, we find that our predictions for the branching ratios of $\overrightarrow{B}\mathrm{PP}$ are consistent with the present experimental data. But because of the logarithmic divergences at the end points in the hard spectator scatterings and weak annihilation, there are still large uncertainties in these predictions.