TY - JOUR
T1 - Factorization and Sudakov resummation in leptonic radiative B decay
AU - Bosch, S. W.
AU - Hill, R. J.
AU - Lange, B. O.
AU - Neubert, M.
PY - 2003
Y1 - 2003
N2 - Soft-collinear effective theory is used to prove factorization of the [Formula Presented] decay amplitude at leading power in [Formula Presented] including a demonstration of the absence of nonvalence 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 by-product, the evolution equation for heavy-collinear current operators in soft-collinear effective theory is derived.
AB - Soft-collinear effective theory is used to prove factorization of the [Formula Presented] decay amplitude at leading power in [Formula Presented] including a demonstration of the absence of nonvalence 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 by-product, the evolution equation for heavy-collinear current operators in soft-collinear effective theory is derived.
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U2 - 10.1103/PhysRevD.67.094014
DO - 10.1103/PhysRevD.67.094014
M3 - Article
AN - SCOPUS:0038236438
SN - 1550-7998
VL - 67
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 9
ER -