Abstract
Using the CLEO II detector at the Cornell Electron Storage Ring we have measured the decay asymmetry parameter in the decay We find using the world average value of we obtain The physically allowed range of a decay asymmetry parameter is Our result prefers a negative value: is at the 90% C.L. The central value occupies the middle of the theoretically expected range but is not yet precise enough to choose between models.
- Received 20 November 2000
DOI:https://doi.org/10.1103/PhysRevD.63.111102
©2001 American Physical Society