# Strong Phase and $D^0-D^0bar$ mixing at BES-III

## TL;DR

This paper evaluates the potential of BES-III to measure $D^0$-$ar{D}^0$ mixing parameters and the strong phase difference, building on recent evidence of $D$ mixing from BaBar and Belle, and discusses experimental sensitivities and techniques.

## Contribution

It provides an analysis of BES-III's sensitivity to $D$ mixing parameters and the strong phase difference using data near the $Dar{D}$ threshold with CP tagging.

## Key findings

- Estimated sensitivity of $y$ measurement at BES-III.
- Projected measurement of the mixing rate $R_M$.
- Sensitivity of strong phase difference measurement at BES-III.

## Abstract

Most recently, both BaBar and Belle experiments found evidences of neutral $D$ mixing. In this paper, we discuss the constraints on the strong phase difference in $D^0 \to K\pi$ decay from the measurements of the mixing parameters, $y^\prime$, $y_{CP}$ and $x$ at the $B$ factories. The sensitivity of the measurement of the mixing parameter $y$ is estimated in BES-III experiment at $\psi(3770)$ peak. We also make an estimate on the measurements of the mixing rate $R_M$. Finally, the sensitivity of the strong phase difference at BES-III are obtained by using data near the $D\bar{D}$ threshold with CP tag technique at BES-III experiment.