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First Observation of the Decay Bs0 -> Ds-Ds+ and Measurement of Its Branching Ratio

CollaborationWith : Clark, Allan Geoffrey / Hamilton, Andrew / Lefevre, Régis / Sfyrla, Anna / Shreyber, Irina / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2008, vol. 100, no. 02, p. 021803
Abstract We report the observation of the exclusive decay B0s→D−sD+s at the 7.5 standard deviation level using 355  pb−1 of data collected by the CDF II detector in pp collisions at s√=1.96  TeV at the Fermilab Tevatron. We measure the relative branching ratio B(B0s→D−sD+s)/B(B0→D−D+s)=1.44+0.48−0.44. Using the world average value for B(B0→D−D+s), we find B(B0s→D−sD+s)=(9.4+4.4−4.2)×10−3. This provides a lower bound ΔΓCPs/Γs≥2B(B0s→D−sD+s)>1.2×10−2 at 95% C.L.
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CDF COLLABORATION. First Observation of the Decay Bs0 -> Ds-Ds+ and Measurement of Its Branching Ratio. In: Physical Review Letters, 2008, vol. 100, n° 02, p. 021803. https://archive-ouverte.unige.ch/unige:38493

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Deposited on : 2014-07-07

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