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Observation of Bs0 -> J/ψK*(892)0 and Bs0 -> J/ψKS0 decays

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2011, vol. 83, no. 05, p. 052012
Abstract We report the first observation of two Cabibbo-suppressed decay modes of the B0s meson. Using a sample of pp collisions at s√=1.96  TeV corresponding to 5.9  fb−1 of integrated luminosity collected with the CDF II, the collider detector at the Fermilab Tevatron, we search for new B0s decay modes in a sample of events containing J/ψ→μ+μ− decays. We reconstruct a B0s→J/ψK∗(892)0 signal with K∗(892)0→K+π−, observing a yield of 151±25 events with a statistical significance of 8.0σ. We also reconstruct a B0s→J/ψK0S signal with K0S→π+π−, observing a yield of 64±14 events with a statistical significance of 7.2σ. From these yields, we extract the branching ratios B(B0s→J/ψK∗(892)0)=(8.3±3.8)×10−5 and B(B0s→J/ψK0)=(3.5±0.8)×10−5, where statistical, systematic, and fragmentation-fraction uncertainties are included in the combined uncertainty.
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CDF COLLABORATION. Observation of Bs0 -> J/ψK*(892)0 and Bs0 -> J/ψKS0 decays. In: Physical Review. D, 2011, vol. 83, n° 05, p. 052012. https://archive-ouverte.unige.ch/unige:38663

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Deposited on : 2014-07-15

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