QCD Factorization For B Decays To Two Light Pseudoscalars Including Chirally Enhanced Corrections

الأصل · EN

Since b quark mass is not asymptotically large, chirally enhanced corrections which arise from twist-3 wave functions may be important in B decays. We thus evaluate the hadronic matrix elements with the emitted meson described by leading twist and twist-3 distribution amplitudes Φₚ(x). After summing over the four "vertex correction" diagrams, we obtain the results with infrared finiteness which shows that chirally enhanced corrections arise from Φₚ(x) can be consistently included in QCD factorization. We also briefly discuss the contributions from "hard spectator" diagrams.