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QCD factorization for exclusive, non-leptonic B meson decays: General arguments and the case of heavy-light final states

M. Beneke·G. Buchalla·M. Neubert·C. T. Sachrajda
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Abstract

We provide a rigorous basis for factorization for a large class of non-leptonic two-body $B$-meson decays in the heavy-quark limit. The factorization formula incorporates elements of the naive factorization approach and the hard-scattering approach, but allows us to compute systematically radiative (``non-factorizable'') corrections to naive factorization for decays such as $B\to Dπ$ and $B\to ππ$. We discuss the factorization formula for a general final state from a general point of view. We then consider factorization for decays into heavy-light final states (such as $B\to Dπ$) in more detail, including a proof of the factorization formula at two-loop order. Explicit results for the leading QCD corrections to factorization are presented and compared to existing measurements of branching fractions and final-state interaction phases.

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M. Beneke, G. Buchalla, M. Neubert, C. T. Sachrajda. 2000-06-13. QCD factorization for exclusive, non-leptonic B meson decays: General arguments and the case of heavy-light final states. https://doi.org/10.1016/s0550-3213(00)00559-9

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