Factorization and Sudakov resummation in leptonic radiative B decay

S. W. Bosch, R. J. Hill, B. O. Lange, M. Neubert

Research output: Contribution to journalArticlepeer-review

102 Scopus citations

Abstract

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.

Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume67
Issue number9
DOIs
StatePublished - 2003

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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