Abstract
We have measured the spectral shape Michel parameters and using leptonic decays of the , recorded by the CLEO II detector. Assuming universality in the vectorlike couplings, we find and , where the first error is statistical and the second systematic. We also present measurements for the parameters for and final states separately.
- Received 26 December 1996
DOI:https://doi.org/10.1103/PhysRevLett.78.4686
©1997 American Physical Society