Abstract
We study using of data collected at the resonance with the Belle detector at the KEKB asymmetric-energy collider. We measure an inclusive branching fraction of and an inclusive asymmetry of , where the first uncertainties are statistical and the second are systematic, and a branching fraction of , where the third uncertainty is due to possible interference with . We present the first observation of a structure around in the mass spectrum, with a significance of , and measure a branching fraction to be . We also report a measurement of local asymmetry in this structure.
- Received 3 August 2022
- Accepted 27 March 2023
DOI:https://doi.org/10.1103/PhysRevLett.130.181804
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 SCOAP3.
Published by the American Physical Society