# Measurement of the $B_s^0\to J/\psi K_S^0$ branching fraction

Abstract : The $B_s^0\to J/\psi K_S^0$ 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 sin2$\beta$ measurement from $B^0\to J/\psi K_S^0$ The time-integrated branching fraction is measured to be $BF(B_s^0\to J/\psi K_S^0)=(1.83\pm0.28)\times10^{-5}$. This is the most precise measurement to date.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00697164
Contributor : Claudine Bombar <>
Submitted on : Monday, May 14, 2012 - 4:36:17 PM
Last modification on : Tuesday, April 20, 2021 - 12:00:13 PM

### Citation

R. Aaij, I. de Bonis, D. Decamp, Ph. Ghez, P. Hopchev, et al.. Measurement of the $B_s^0\to J/\psi K_S^0$ branching fraction. Physics Letters B, Elsevier, 2012, 713, pp.172-179. ⟨10.1016/j.physletb.2012.05.062⟩. ⟨in2p3-00697164⟩

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