Abstract
This article describes improved measurements by CLEO of the and branching fractions, and first evidence for the decay where represents the sum of the and charm meson states. Also reported is the first measurement of the polarization in the decay A partial reconstruction technique, employing only the fully reconstructed and slow pion from the decay, enhances sensitivity. The observed branching fractions are , and where the first error is statistical, the second systematic, and the third is the uncertainty in the branching fraction. The measured longitudinal polarization, is consistent with the factorization prediction of 54%.
- Received 8 August 2000
DOI:https://doi.org/10.1103/PhysRevD.62.112003
©2000 American Physical Society