We measure the branching fraction of the decay B0→J/ψω using data collected with the Belle II detector at the SuperKEKB collider. The data contain (387±6)×106 BB¯ meson pairs produced in energy-asymmetric e+e- collisions at the δ(4S) resonance. The measured branching fraction B(B0→J/ψω)=(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.

Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Alhakami, M., et al. (2025). Observation of the decay B0→J/ψω at Belle II. PHYSICAL REVIEW D, 111(3), 032012-1-032012-8 [10.1103/physrevd.111.032012].

Observation of the decay B0→J/ψω at Belle II

Branchini, P.
Membro del Collaboration Group
;
Budano, A.
Membro del Collaboration Group
;
Bussino, S.
Membro del Collaboration Group
;
De Pietro, G.
Membro del Collaboration Group
;
Laurenza, M.
Membro del Collaboration Group
;
Martellini, C.
Membro del Collaboration Group
;
Martini, A.
Membro del Collaboration Group
;
2025-01-01

Abstract

We measure the branching fraction of the decay B0→J/ψω using data collected with the Belle II detector at the SuperKEKB collider. The data contain (387±6)×106 BB¯ meson pairs produced in energy-asymmetric e+e- collisions at the δ(4S) resonance. The measured branching fraction B(B0→J/ψω)=(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.
2025
Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Alhakami, M., et al. (2025). Observation of the decay B0→J/ψω at Belle II. PHYSICAL REVIEW D, 111(3), 032012-1-032012-8 [10.1103/physrevd.111.032012].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/511336
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