Observation of the decay B⁰→J/ψω at Belle II
Date
2025
Authors
Adachi, I.
Aggarwal, L.
Ahmed, H.
Aihara, H.
Akopov, N.
Alhakami, M.
Aloisio, A.
Althubiti, N.
Anh Ky, N.
Asner, D.M.
Editors
Advisors
Journal Title
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Type:
Journal article
Citation
Physical Review D, 2025; 111(3):032012-1-032012-8
Statement of Responsibility
Belle II Collaboration
Conference Name
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 ϒ(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
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Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP.
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Grant ID
http://purl.org/au-research/grants/arc/DP200101792
http://purl.org/au-research/grants/arc/DP210101900
http://purl.org/au-research/grants/arc/DP210102831
http://purl.org/au-research/grants/arc/DE220100462
http://purl.org/au-research/grants/arc/LE210100098
http://purl.org/au-research/grants/arc/LE230100085
http://purl.org/au-research/grants/arc/DP210101900
http://purl.org/au-research/grants/arc/DP210102831
http://purl.org/au-research/grants/arc/DE220100462
http://purl.org/au-research/grants/arc/LE210100098
http://purl.org/au-research/grants/arc/LE230100085