D Mixing and Cabibbo Suppressed Decays

The CLEO collaboration reported observation of the ‘wrong sign’ decay D → Kπ in 1993. Upgrades have been made to the CLEO detector , including installation of a silicon vertex detector, which provide substantial improvements in sensitivity to D→Kπ. The vertex detector enables the reconstruction of the proper lifetime of the D, and so provides sensitivity to D−D mixing. We will give preliminary results on the rate of ‘wrong sign’ decay and D−D mixing using data from the 9.1 fb of integrated luminosity that has been accumulated with the upgrades in place. In addition, we will give sensitivity estimates of on-shell D−D mixing derived from measurement of the lifetime measured with decays of the D to CP eigenstates such as KK, ππ, and KSφ.