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Creators/Authors contains: "Brenny, N"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    We measure the branching fraction of the decay B 0 → J / ψ ω using data collected with the Belle II detector at the SuperKEKB collider. The data contain ( 387 ± 6 ) × 10 6     B B ¯ meson pairs produced in energy-asymmetric e + e − collisions at the ϒ ( 4 S ) resonance. The measured branching fraction B ( B 0 → J / ψ ω ) = ( 2.16 ± 0.30 ± 0.14 ) × 10 − 5 , where the first uncertainty is statistical and the second is systematic, is more precise than previous results and constitutes the first observation of the decay with a significance of 6.5 standard deviations. Published by the American Physical Society2025 
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    Free, publicly-accessible full text available February 1, 2026