Abstract
We discuss factorization in exclusive radiative leptonic B → γe v̄ decays using the soft-collinear effective theory. The form factors describing these decays can be expanded in a power series in ∧QCD/Eγ with Eγ the photon energy. We write down the most general operators in the effective theory which contribute to the form factors at leading order in ∧QCD/Eγ, proving their factorization into hard, jet and soft contributions, to all orders in αs.
Original language | English |
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Pages (from-to) | 349-364 |
Number of pages | 16 |
Journal | Nuclear Physics B |
Volume | 649 |
Issue number | 1-2 |
DOIs | |
State | Published - 20 Jan 2003 |