Abstract
Decays of the form B 0(s) → J/ψK 0S h + h (′) −(h (′) = K, π) are searched for in proton-proton collision data corresponding to an integrated luminosity of 1.0 fb−1 recorded with the LHCb detector. The first observation of the B 0 s → J/ψK 0S K ± π ∓ decay is reported, with significance in excess of 10 standard deviations. The B 0 → J/ψK 0S K + K − decay is also observed for the first time. The branching fraction of B 0 → J/ψK 0S π + π − is determined, to significantly better precision than previous measurements, using B 0 → J/ψK 0S as a normalisation channel. Branching fractions and upper limits of the other B 0(s) → J/ψK 0S h + h (′) − modes are determined relative to that of the B 0 → J/ψK 0S π + π − decay.
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The LHCb collaboration., Aaij, R., Adeva, B. et al. Observation of the B 0 s → J/ψK 0S K ± π ∓ decay. J. High Energ. Phys. 2014, 140 (2014). https://doi.org/10.1007/JHEP07(2014)140
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DOI: https://doi.org/10.1007/JHEP07(2014)140