Abstract
The cross sections of the process at center-of-mass energies () between 3.81 and 4.60 GeV are measured with high precision by using data samples collected with the BESIII detector operating at the BEPCII storage ring. Three structures are observed by analyzing the line shape of the measured cross sections, and a maximum-likelihood fit including three resonances is performed by assuming the lowest lying structure is the . For the other resonances, we obtain masses of and with corresponding widths of and , respectively, where the first uncertainties are statistical and the second ones systematic. The measured resonant parameters are consistent with those of the and from previous measurements of different final states. For the first time, we observe the decays of the and into final states.
- Received 9 March 2020
- Revised 20 April 2020
- Accepted 24 July 2020
DOI:https://doi.org/10.1103/PhysRevD.102.031101
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