Abstract
Using a data sample collected with the BESIII detector operating at the BEPCII storage ring at a center-of-mass energy of , we search for the production of . A search is also performed for the charmonium-like state in the radiative transition with subsequently decaying into . The processes and are observed for the first time, each with a statistical significance of more than , and the Born cross sections are measured to be () and , respectively, where the first uncertainties are statistical and the second systematic. No significant signals are observed for and and upper limits on the Born cross sections at 90% C.L. are provided at .
- Received 27 December 2017
DOI:https://doi.org/10.1103/PhysRevD.97.032008
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