Abstract
Using of collision data at center-of-mass energies from 4.661 to 4.951 GeV collected by the BESIII detector at the BEPCII collider, we observe the production process for the first time. The significance is , including both the statistical and systematic uncertainties. The Born cross section and the corresponding upper limit at 90% confidence level at each energy point are reported. The line shape of the cross section indicates that the signals may be from the decays of some nontrivial structures.
- Received 14 December 2022
- Revised 16 March 2023
- Accepted 20 March 2023
DOI:https://doi.org/10.1103/PhysRevLett.130.151904
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