Abstract
We report the results of a search for mixing in decays based on of data accumulated by the Belle detector at KEKB. Both assuming conservation and allowing for violation, we fit the decay-time distribution for the mixing parameters and , as well as for the parameter , the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays. The 95% confidence level region in the () plane is obtained using a frequentist method. Assuming conservation, we find and at the 95% confidence level; these are the most stringent constraints on the mixing parameters to date. The no-mixing point has a confidence level of 3.9%. Assuming no mixing, we measure .
- Received 17 January 2006
DOI:https://doi.org/10.1103/PhysRevLett.96.151801
©2006 American Physical Society