TY - JOUR
T1 - Factorization in B→Vγ decays
AU - Becher, T.
AU - Hill, R. J.
AU - Neubert, M.
PY - 2005/11/1
Y1 - 2005/11/1
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/29744454118
UR - https://www.scopus.com/inward/citedby.url?scp=29744454118&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.72.094017
DO - 10.1103/PhysRevD.72.094017
M3 - Article
AN - SCOPUS:29744454118
SN - 1550-7998
VL - 72
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 9
M1 - 094017
ER -