Abstract
We report the first observation of mixing in the decays of and , using data samples of events and events accumulated with the BESIII detector. The signals of and mixing are observed at levels of statistical significance of and , respectively. The corresponding branching fractions and mixing intensities are measured and the constraint regions on the coupling constants, and , are estimated. The results improve the understanding of the nature of and .
- Received 6 February 2018
- Revised 8 June 2018
DOI:https://doi.org/10.1103/PhysRevLett.121.022001
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