Abstract
We report the results of the first search for the decay using of data collected at the resonance with the Belle detector at the KEKB asymmetric-energy collider. We observe no signal and set a 90% confidence level upper limit of on the decay branching fraction.
- Received 23 January 2023
- Accepted 2 March 2023
DOI:https://doi.org/10.1103/PhysRevD.107.L051101
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Published by the American Physical Society