Factorization in exclusive semileptonic radiative B decays
Abstract
We derive a new factorization relation for the semileptonic radiative decay B -> π γ in the kinematical region of a slow pion pπ ~ and an energetic photon Eγ >> , working at leading order in /mb. In the limit of a soft pion, the nonperturbative matrix element appearing in this relation can be computed using chiral perturbation theory. We present a phenomenological study of this decay, which may be important for a precise determination of the exclusive nonradiative decay.
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