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Observation of B+→φφK+ and Evidence for B0→φφK0 below ηc Threshold
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We report measurements of the decays B + → ϕ ϕ K + and B 0 → ϕ ϕ K 0 using a sample of 231 × 10 6 B ¯¯¯ B pairs collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the Stanford Linear Accelerator Center. The branching fractions are measured to be B ( B + → ϕ ϕ K + ) = ( 7.5 ± 1.0 ( stat ) ± 0.7 ( syst ) ) × 10 − 6 and B ( B 0 → ϕ ϕ K 0 ) = ( 4.1 + 1.7 − 1.4 ( stat ) ± 0.4 ( syst ) ) × 10 − 6 for a ϕ ϕ invariant mass below 2.85 GeV / c 2 .
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GRAUGÉS POUS, Eugeni and BABAR Collaboration. Observation of B+→φφK+ and Evidence for B0→φφK0 below ηc Threshold. Physical Review Letters. 2006. Vol. 97, num. 26, pags. 261803. ISSN 0031-9007. [consulted: 18 of June of 2026]. Available at: https://hdl.handle.net/2445/140401