Abstract
By analyzing events collected with the BESIII detector operating at the BEPCII collider, the decays of (, 1, 2) are observed for the first time with statistical significances of , and , respectively. The product branching fractions of , are presented, and the branching fractions of decays are determined to be , and , where the first uncertainties are statistical and the second are systematic, respectively.
- Received 24 January 2019
DOI:https://doi.org/10.1103/PhysRevD.99.052008
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Published by the American Physical Society