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 language | English |
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Article number | 094017 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 72 |
Issue number | 9 |
DOIs | |
State | Published - Nov 1 2005 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)