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First observation of the decay B0s→K0SK∗(892)0

Abstract : A search for B0(s)→K0SK∗(892)0 decays is performed using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector at a centre-of-mass energy of 7 TeV. The B0s→K0SK∗(892)0 decay is observed for the first time, with a significance of 7.1 standard deviations. The branching fraction is measured to be B(B0s→K0SK∗(892)0)=(10.9±2.5±1.2)×10−6, where the first uncertainty is statistical and the second is systematic. No evidence is found for the decay B0→K0SK∗(892)0 and an upper limit is set on the branching fraction, B(B0→K0SK∗(892)0)<0.64 ×10−6, at 90% confidence level. All results are consistent with Standard Model predictions.
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Submitted on : Tuesday, June 30, 2015 - 9:55:22 AM
Last modification on : Thursday, December 16, 2021 - 2:11:21 PM

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R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. First observation of the decay B0s→K0SK∗(892)0. Journal of High Energy Physics, Springer Verlag (Germany), 2016, 01 (012), ⟨10.1007/JHEP01(2016)012⟩. ⟨in2p3-01169711⟩



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