Abstract
Using data samples of , , and collected with the Belle detector at the KEKB asymmetric-energy collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions (, 1, 2) and . A significant signal is observed for the first time at with a significance of including systematic uncertainties. No significant excesses for , , and final states are found, and we set 90% credibility level upper limits on the Born cross sections () at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of is obtained.
- Received 24 October 2018
DOI:https://doi.org/10.1103/PhysRevD.98.092015
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