Factorization in exclusive semileptonic radiative B decays

Details Factorization in exclusive semileptonic radiative B decays Factorization in exclusive semileptonic radiative B decays

2005-08-09

arxiv.org/abs/hep-ph/0508095v2

Phys.Rev. D72 (2005) 094021

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 3 figures; minor corrections, one reference added

Scientific paper

10.1103/PhysRevD.72.094021

We derive a new factorization relation for the semileptonic radiative decay B -> \pi \ell \nu \gamma in the kinematical region of a slow pion p_\pi ~ \Lambda and an energetic photon E_\gamma >> \Lambda, working at leading order in \Lambda/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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