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Factorization in exclusive semileptonic radiative B decays

Cirigliano, Vincenzo and Pirjol, Dan (2005) Factorization in exclusive semileptonic radiative B decays. Physical Review D, 72 (9). Art. No. 094021. ISSN 2470-0010. doi:10.1103/PhysRevD.72.094021.

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We derive a new factorization relation for the semileptonic radiative decay B-->pi[script-l]nugamma in the kinematical region of a slow pion |p-->pi|~Lambda and an energetic photon Egamma>>Lambda, working at leading order in Lambda/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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Additional Information:©2005 The American Physical Society (Received 4 October 2005; published 22 November 2005) We thank Iain Stewart and Chris Lee for useful discussions and comments on the manuscript. We thank the Institute for Nuclear Theory at the University of Washington for its hospitality and the Department of Energy for partial support during the completion of this work. This work was supported by Caltech through the Sherman Fairchild fund (V. C.), and by the DOE under the cooperative research agreement DOE-FC02-94ER40818 (D. P.).
Subject Keywords:semileptonic decays; electromagnetic decays; chiral symmetries; perturbation theory; B mesons
Issue or Number:9
Record Number:CaltechAUTHORS:CIRprd05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1920
Deposited By: Archive Administrator
Deposited On:23 Feb 2006
Last Modified:08 Nov 2021 19:43

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