Abstract
We observe for the first time the process with data collected by the BESIII experiment. Significant signals are observed at the center-of-mass energy , and the Born cross section is measured to be . Evidence for is observed at with a Born cross section of , and upper limits on the production cross section at other center-of-mass energies between 4.085 and 4.600 GeV are determined.
- Received 26 April 2017
DOI:https://doi.org/10.1103/PhysRevD.96.012001
© 2017 American Physical Society