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Article overview
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Factorization and Sudakov Resummation in Leptonic Radiative B Decay | S.W. Bosch
; R.J. Hill
; B.O. Lange
; M. Neubert
; | Date: |
16 Dec 2002 | Journal: | Phys.Rev. D67 (2003) 094014 | Subject: | hep-ph | Affiliation: | Cornell), R.J. Hill (SLAC), B.O. Lange (Cornell), M. Neubert (Cornell | Abstract: | Soft-collinear effective theory is used to prove factorization of the B->gamma+l+nu decay amplitude at leading power in Lambda/m_b, including a demonstration of the absence of non-valence Fock states and of the finiteness of the convolution integral in the factorization formula. Large logarithms entering the hard-scattering kernel are resummed by performing a two-step perturbative matching onto the low-energy effective theory, and by solving evolution equations derived from the renormalization properties of the leading-order B-meson light-cone distribution amplitude. As a byproduct, the evolution equation for heavy-collinear current operators in soft-collinear effective theory is derived. | Source: | arXiv, hep-ph/0301123 | Services: | Forum | Review | PDF | Favorites |
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