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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/132875
Observation of the B0s→η′η′ Decay
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The first observation of the B 0 s → η ′ η ′ decay is reported. The study is based on a sample of proton-proton collisions corresponding to 3.0 fb − 1 of integrated luminosity collected with the LHCb detector. The significance of the signal is 6.4 standard deviations. The branching fraction is measured to be [ 3.31 ± 0.64 ( stat ) ± 0.28 ( syst ) ± 0.12 ( norm ) ] × 10 − 5 , where the third uncertainty comes from the B ± → η ′ K ± branching fraction that is used as a normalization. In addition, the charge asymmetries of B ± → η ′ K ± and B ± → ϕ K ± , which are control channels, are measured to be ( − 0.2 ± 1.3 ) % and ( + 1.7 ± 1.3 ) % , respectively. All results are consistent with theoretical expectations.
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BADALOV, Alexey, et al. Observation of the B0s→η′η′ Decay. Physical Review Letters. 2015. Vol. 115, num. 5, pags. 051801. ISSN 0031-9007. [consulted: 10 of August of 2026]. Available at: https://hdl.handle.net/2445/132875