Eur Phys J C (2004) 33: s294-s296
https://doi.org/10.1140/epjcd/s2003-03-208-0

PS02 Rare Decays

Factorization and Sudakov Resummation in B→γ l ν

Newman Laboratory for Elementary-Particle Physics, Cornell University, Ithaca, NY 14853, U.S.A.

Received: 20 August 2003
Accepted: 25 August 2003
Published online: 11 September 2003

Abstract

We apply Soft-Collinear Effective Theory to prove at leading power in Λ _QCD/m _b a factorization formula for the radiative leptonic decay B→γ l ν. Large logarithms entering the hard-scattering kernel are systematically resummed by a two-step perturbative matching procedure.

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