Factorization in leptonic radiative B -> gamma e\nu decays
High Energy Physics - Phenomenology
2009-11-07 v2
Abstract
We discuss factorization in exclusive radiative leptonic B->\gamma e\nu decays using the soft-collinear effective theory. The form factors describing these decays can be expanded in a power series in Lambda/E_\gamma with E_\gamma the photon energy. We write down the most general operators in the effective theory which contribute to the form factors at leading order in Lambda_QCD/E_\gamma, proving their factorization into hard, jet and soft contributions, to all orders in alpha_s.
Cite
@article{arxiv.hep-ph/0210091,
title = {Factorization in leptonic radiative B -> gamma e\nu decays},
author = {Enrico Lunghi and Dan Pirjol and Daniel Wyler},
journal= {arXiv preprint arXiv:hep-ph/0210091},
year = {2009}
}
Comments
15 pages, 10 included .eps figures, final version to appear in Nuclear Physics B Ref-no: ZU-TH 17/02