Factorization in B→Vγ decays

T. Becher, R. J. Hill, M. Neubert

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

The factorization properties of the radiative decays B→Vγ are analyzed at leading order in 1/mb using the soft-collinear effective theory. It is shown that the decay amplitudes can be expressed in terms of a B→V form factor evaluated at q2=0, light-cone distribution amplitudes of the B and V mesons, and calculable hard-scattering kernels. The renormalization-group equations in the effective theory are solved to resum perturbative logarithms of the different scales in the decay process. Phenomenological implications for the B→K*γ branching ratio, isospin asymmetry, and CP asymmetries are discussed, with particular emphasis on possible effects from physics beyond the standard model.

Original languageEnglish
Article number094017
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume72
Issue number9
DOIs
StatePublished - Nov 1 2005

ASJC Scopus subject areas

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

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