Factorization in B{yields}V{gamma} decays

Journal Article · Tue Nov 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.094017· OSTI ID:20713831

Becher, T ^[1]; Hill, R J ^[2]; Neubert, M ^[3]

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1. Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
2. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
3. 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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