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Factorization in exclusive semileptonic radiative B decays

Vincenzo Cirigliano·Dan Pirjol
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Abstract

We derive a new factorization relation for the semileptonic radiative decay B -> π\ell νγin the kinematical region of a slow pion p_π~ Λand an energetic photon E_γ>> Λ, working at leading order in Λ/m_b. 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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Vincenzo Cirigliano, Dan Pirjol. 2005-08-24. Factorization in exclusive semileptonic radiative B decays. https://doi.org/10.1103/physrevd.72.094021

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