Factorization in B->V gamma Decays

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dc.creatorBecher, Thomas
dc.creatorHill, Richard J.
dc.creatorNeubert, Matthias
dc.date2005-03-28
dc.date2005-11-03
dc.date.accessioned2026-07-07T11:31:47Z
dc.date.available2026-07-07T11:31:47Z
dc.descriptionThe factorization properties of the radiative decays B->V gamma are analyzed at leading order in 1/m_b 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 q^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->K* gamma branching ratio, isospin asymmetry, and CP asymmetries are discussed, with particular emphasis on possible effects from physics beyond the Standard Model.
dc.description52 pages, 7 figures; references added and brief discussion of power corrections included; version to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/0503263
dc.identifierhttp://arxiv.org/abs/hep-ph/0503263
dc.identifierPhys.Rev.D72:094017,2005
dc.identifierdoi:10.1103/PhysRevD.72.094017
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197380
dc.subjectHigh Energy Physics - Phenomenology
dc.titleFactorization in B->V gamma Decays
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