2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48983The CLEO collaboration reported observation of the `wrong sign' decay $D^0 \to K^+π^-$ in 1993. Upgrades have been made to the CLEO detector, including installation of a silicon vertex detector, which provide substantial improvements in sensitivity to $D^0 \to K^+π^-$. The vertex detector enables the reconstruction of the proper lifetime of the $D^0$, and so provides sensitivity to $D^0-\bar{D}^0$ mixing. We will give preliminary results on the rate of `wrong sign' decay and $D^0-\bar{D}^0$ mixing using data from the $9.1 fb^{-1}$ of integrated luminosity that has been accumulated with the upgrades in place. In addition, we will give sensitivity estimates of on-shell $D^0-\bar{D}^0$ mixing derived from measurement of the lifetime measured with decays of the $D^0$ to CP eigenstates such as $K^+K^-, π^+π^-$, and $K_Sϕ$.7 pages Latex, Lake Louise Winter Institute 1999 Conference ProceedingsHigh Energy Physics - Phenomenologytext