Abstract
The decay is searched for using data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies and 4.26 GeV. No significant signal for the is found, and upper limits at the 90% confidence level on the Born cross section for the process are determined to be 0.26 and 0.18 pb at and 4.26 GeV, respectively.
- Received 8 July 2015
DOI:https://doi.org/10.1103/PhysRevD.92.032009
© 2015 American Physical Society