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Perturbative QCD analysis of exclusive $B$ meson decays

Hsiang-nan Li
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Abstract

We review the perturbative QCD formalism for exclusive heavy meson decays, concentrating on the three-scale factorization theorem for nonleptonic processes. The formalism is then extended to the radiative decay $B\to K^*γ$, which occurs through penguin diagrams. It is observed that the contributions from the operators other than the penguin one $b\to sγ$ are not negligible. From the best fit to the experimental data of the branching ratio ${\cal B}(B\to K^*γ)$, we extract the $B$ meson wave function, which possesses a sharp peak in the region with a small momentum fraction.

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Hsiang-nan Li. 1998-10-27. Perturbative QCD analysis of exclusive $B$ meson decays. https://arxiv.org/abs/hep-ph/9810222

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