Abstract
We present the study of decays based on events collected with the Belle detector at the KEKB asymmetric-energy collider. The candidates are reconstructed via their decay to and decays to , , and final states. The corresponding branching fractions are measured to be and , which are consistent with the world average values with improved precision. A new structure is found in the spectrum with a significance of including systematic uncertainty. The structure is possibly an excited and is tentatively named . Its mass and width are measured to be and , respectively. The products of branching fractions for the are measured to be and . Here, the first and second uncertainties are statistical and systematic, respectively.
- Received 19 June 2022
- Revised 31 July 2022
- Accepted 23 August 2022
DOI:https://doi.org/10.1103/PhysRevLett.130.031901
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