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Open Access item Branching fraction measurements of B+ -> ρ(+)γ, B(0) -> ρ(0)γ, and B(0) -> ω^γ

Other Titles:Branching fraction measurements of B+->rho(+)gamma, B-0 ->rho(0)gamma, and B-0 ->omega gamma
Authors:Grauges, E.
Azzolini, Virginia
López-March, Neus
Martínez-Vidal, Fernando
Oyanguren, Arantza
Babar Collaboration
Aubert, B.
Keywords:To-leading Order, Radiative decays, β-decays, Supersymmetry, Ratios, Gamma, QCD, [PACS] Leptonic/semileptonic decays of bottom mesons, [PACS] Determination of electroweak Kobayashi–Maskawa matrix elements, [PACS] Bottom mesons
Issue Date:13-Apr-2007
Publisher:American Physical Society
Citation:Physical Review Letters 98(15): 151802 (2007)
Abstract:We present a study of the decays B+ -> ρ(+)γ, B(0) -> ρ(0)γ, and B(0) -> ω^γ. The analysis is based on data containing 347 x 10(6) B(B)[over-bar] events recorded with the BABAR detector at the PEP-II asymmetric B factory. We measure the branching fractions B(B+ -> ρ(+)γ)=(1.10(-0.33)(+0.37)±0.09)x10(-6) and B(B(0) -> ρ(0)γ)=(0.79(-0.20)(+0.22)±0.06)x10(-6), and set a 90% C.L. upper limit B(B(0) -> ω^γ) < 0.78x10(-6). We also measure the isospin-averaged branching fraction B(B -> (ρ/ω)^γ)=(1.25(-0.24)(+0.25)±0.09)x10(-6), from which we determine |Vtd/Vts| = 0.200(-0.020)(+0.021)±0.015, where the first uncertainty is experimental and the second is theoretical.
Description:7 pages, 1 figure, 2 tables.-- PACS nrs.: 13.20.He; 12.15.Hh; 14.40.Nd.-- ISI Article Identifier: 000245691400015.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ex/0612017.-- et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevLett.98.151802
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