Abstract
We have observed the decay and have measured its value to be 5.7±0.5 MeV. The decay width of the is less than 2.0 MeV/. The observation of but not of sets an upper limit on the amount of mixing.
- Received 7 April 1977
DOI:https://doi.org/10.1103/PhysRevLett.38.1313
©1977 American Physical Society