Abstract
We study the decays and based on pairs produced in collisions at a center-of-mass energy of , corresponding to an integrated luminosity of . The data sample was accumulated with the BESIII detector at the BEPCII collider. The branching fractions are measured to be and , constituting the most precise measurements to date.
- Received 1 January 2019
DOI:https://doi.org/10.1103/PhysRevD.99.032010
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