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First Observation of Bs0 -> Ds±K∓ and Measurement of the Ratio of Branching Fractions B(Bs0 -> Ds±K∓)/B(Bs0 -> Ds+π−)

CollaborationWith : Clark, Allan Geoffrey / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2009, vol. 103, no. 19, p. 191802
Abstract A combined mass and particle identification fit is used to make the first observation of the decay B0s→D±sK∓ and measure the branching fraction of B0s→D±sK∓ relative to B0s→D+sπ−. This analysis uses 1.2  fb−1 integrated luminosity of pp collisions at s√=1.96  TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a B0s→D±sK∓ signal with a statistical significance of 8.1σ and measure B(B0s→D±sK∓)/B(B0s→D+sπ−)=0.097±0.018(stat)±0.009(syst).
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CDF COLLABORATION. First Observation of Bs0 -> Ds±K∓ and Measurement of the Ratio of Branching Fractions B(Bs0 -> Ds±K∓)/B(Bs0 -> Ds+π−). In: Physical Review Letters, 2009, vol. 103, n° 19, p. 191802. https://archive-ouverte.unige.ch/unige:38621

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Deposited on : 2014-07-14

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