Factorization in leptonic radiative B -> gamma eνdecays

Details Factorization in leptonic radiative B -> gamma eνdecays Factorization in leptonic radiative B -> gamma eνdecays

2002-10-07

arxiv.org/abs/hep-ph/0210091v2

Nucl.Phys. B649 (2003) 349-364

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 10 included .eps figures, final version to appear in Nuclear Physics B Ref-no: ZU-TH 17/02

Scientific paper

10.1016/S0550-3213(02)01032-5

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.

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