Abstract
We have searched for mixing in decays with in a sample of events produced near 10.58 GeV. The charge of the slow pion from charged decay tags the charm flavor at production, and it is required to be consistent with the flavor of a fully reconstructed second charm decay in the same event. We observe 3 mixed candidates compared to 2.85 background events expected from simulation. We ascribe a 50% systematic uncertainty to this expected background rate. We find a central value for the mixing rate of . Using a frequentist method, we set corresponding 68% and 90% confidence intervals at and , respectively.
- Received 9 May 2007
DOI:https://doi.org/10.1103/PhysRevD.76.014018
©2007 American Physical Society