Publications [#309376] of Seog Oh

Papers Published

1. Aaltonen, T; others, First Observation of B̅ s0→Ds ± K∓ and Measurement of the Ratio of Branching Fractions B(B̅ s0→Ds ± K∓)/B(B̅ s0→Ds+π-), Phys. Rev. Lett., vol. 103 no. 19 (2009), pp. 191802 [doi]
   (last updated on 2026/01/20)

   Abstract:
   A combined mass and particle identification fit is used to make the first observation of the decay B̅ s0→Ds ± K∓ and measure the branching fraction of B̅ s0→Ds ± K∓ relative to B̅ s0→Ds+π-. This analysis uses 1.2  fb-1 integrated luminosity of pp̅ collisions at sqrt[s]=1.96  TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a B̅ s0→Ds ± K∓ signal with a statistical significance of 8.1σ and measure B(B̅ s0→Ds ± K∓)/B(B̅ s0→Ds+π-)=0.097 ± 0.018(stat) ± 0.009(syst).