Observation of the decay at Belle II
Collaboration
8 pages
e-Print:
- 2412.12338 [hep-ex]
Report number:
- Belle II preprint: 2024-021,
- KEK preprint: 2024-18
Experiments:
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Abstract: (arXiv)
We measure the branching fraction of the decay using data collected with the Belle II detector at the SuperKEKB collider. The data contain meson pairs produced in energy-asymmetric collisions at the resonance. The measured branching fraction , 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 standard deviations.References(0)
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