Factorization in B{yields}V{gamma} decays
- Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
- Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
- Institute for High-Energy Phenomenology, Newman Laboratory for Elementary-Particle Physics, Cornell University, Ithaca, New York 14853 (United States)
The factorization properties of the radiative decays B{yields}V{gamma} are analyzed at leading order in 1/m{sub b} using the soft-collinear effective theory. It is shown that the decay amplitudes can be expressed in terms of a B{yields}V form factor evaluated at q{sup 2}=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{yields}K*{gamma} branching ratio, isospin asymmetry, and CP asymmetries are discussed, with particular emphasis on possible effects from physics beyond the standard model.
- OSTI ID:
- 20713831
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 72, Issue 9; Other Information: DOI: 10.1103/PhysRevD.72.094017; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASYMMETRY
B MESONS
B QUARKS
BRANCHING RATIO
CP INVARIANCE
DECAY AMPLITUDES
DISTRIBUTION
FACTORIZATION
FORM FACTORS
HADRONIC PARTICLE DECAY
HARD COLLISION MODELS
ISOSPIN
K*-892 MESONS
LIGHT CONE
PERTURBATION THEORY
PHOTONS
RADIATIVE DECAY
RENORMALIZATION
SCATTERING
STANDARD MODEL