Factorization and Sudakov Resummation in B -> gamma l nu
classification
✦ hep-ph
keywords
factorizationgammaapplydecayeffectiveenteringformulahard-scattering
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We apply Soft-Collinear Effective Theory to prove at leading power in Lambda_QCD/m_b a factorization formula for the radiative leptonic decay B -> gamma l nu. Large logarithms entering the hard-scattering kernel are systematically resummed by a two-step perturbative matching procedure.
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