Abstract
The muon semileptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the beta decay mode and yields a value for the ratio of decay rates of . This is in agreement with the SU(3) flavor symmetric quark model.
- Received 25 April 2005
DOI:https://doi.org/10.1103/PhysRevLett.95.081801
©2005 American Physical Society