D^0 Mixing and Cabibbo Suppressed Decays

TL;DR

This paper reports on improved sensitivity to D^0 - ar{D}^0 mixing and Cabibbo suppressed decays using upgraded detector technology, with preliminary results from data collected at CLEO.

Contribution

The paper presents new measurements and sensitivity estimates for D^0 mixing and suppressed decays leveraging detector upgrades and a substantial data set.

Findings

Preliminary measurement of wrong sign decay rate.

Enhanced sensitivity to D^0-ar{D}^0 mixing.

Estimates of mixing parameters from lifetime measurements.

Abstract

The CLEO collaboration reported observation of the `wrong sign' decay $D^0 \to K^+\pi^-$ in 1993. Upgrades have been made to the CLEO detector, including installation of a silicon vertex detector, which provide substantial improvements in sensitivity to $D^0 \to K^+\pi^-$. 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 $K^+K^-, \pi^+\pi^-$, and $K_S\phi$.