Abstract
Using a sample of events collected with the BESIII detector operating at the BEPCII storage ring, a partial wave analysis of the decay is performed. The first observation of an isoscalar state with exotic quantum numbers , denoted as , is reported in the process with . Its mass and width are measured to be and , respectively, where the first uncertainties are statistical and the second are systematic, and its statistical significance is estimated to be larger than .
- Received 3 February 2022
- Revised 3 May 2022
- Accepted 27 September 2022
DOI:https://doi.org/10.1103/PhysRevLett.129.192002
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