Abstract
The process is studied at 22 center-of-mass energy points () between 2.00 and 3.08 GeV using of data collected with the BESIII detector. The measured Born cross section of is found to be consistent with BABAR measurements, but with improved precision. A resonant structure around 2.175 GeV is observed with a significance of with mass and width , where the first uncertainties are statistical and the second are systematic.
- Received 26 April 2021
- Accepted 7 July 2021
DOI:https://doi.org/10.1103/PhysRevD.104.032007
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