We discuss factorization in exclusive radiative leptonic B→γe ν̄ decays using the soft-collinear effective theory. The form factors describing these decays can be expanded in a power series in ΛQCD/ 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 ΛQCD/ Eγ, proving their factorization into hard, jet and soft contributions, to all orders in αs.
Nuclear Physics B
- Pub Date:
- January 2003
- High Energy Physics - Phenomenology
- 15 pages, 10 included .eps figures, final version to appear in Nuclear Physics B Ref-no: ZU-TH 17/02