Using a sample of 471×106 BB̄ events collected with the BABAR detector, we study the sum of seven exclusive final states B→X s(d)γ, where Xs(d) is a strange (nonstrange) hadronic system with a mass of up to 2.0GeV/c2. After correcting for unobserved decay modes, we obtain a branching fraction for b→dγ of (9.2±2.0(stat)±2.3(syst))×10⊃-6 in this mass range, and a branching fraction for b→sγ of (23.0±0.8(stat)±3. 0(syst))×10⊃-5 in the same mass range. We find B(b→dγ) B(b→sγ)=0.040±0.009(stat)±0.010(syst), from which we determine |Vtd/Vts|=0.199±0.022(stat)±0. 024(syst)±0.002(th).
Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Tico, J., et al. (2010). Study of B→Xγ decays and determination of |Vtd/V ts|. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 82(5) [10.1103/PhysRevD.82.051101].
Study of B→Xγ decays and determination of |Vtd/V ts|
Martinelli M;CARPINELLI, MassimoMembro del Collaboration Group
;
2010
Abstract
Using a sample of 471×106 BB̄ events collected with the BABAR detector, we study the sum of seven exclusive final states B→X s(d)γ, where Xs(d) is a strange (nonstrange) hadronic system with a mass of up to 2.0GeV/c2. After correcting for unobserved decay modes, we obtain a branching fraction for b→dγ of (9.2±2.0(stat)±2.3(syst))×10⊃-6 in this mass range, and a branching fraction for b→sγ of (23.0±0.8(stat)±3. 0(syst))×10⊃-5 in the same mass range. We find B(b→dγ) B(b→sγ)=0.040±0.009(stat)±0.010(syst), from which we determine |Vtd/Vts|=0.199±0.022(stat)±0. 024(syst)±0.002(th).
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