Measurement of the B 0 s → J / ψ K 0 S branching fraction ✩
semanticscholar(2012)
摘要
Article history: Received 4 May 2012 Received in revised form 26 May 2012 Accepted 29 May 2012 Available online 1 June 2012 Editor: L. Rolandi The Bs → J/ψ K 0 S branching fraction is measured in a data sample corresponding to 0.41 fb−1 of integrated luminosity collected with the LHCb detector at the LHC. This channel is sensitive to the penguin contributions affecting the sin 2β measurement from B0 → J/ψ K 0 S . The time-integrated branching fraction is measured to be B(Bs → J/ψ K 0 S ) = (1.83 ± 0.28) × 10−5. This is the most precise measurement to date. © 2012 CERN. Published by Elsevier B.V. All rights reserved.
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