Recent results on D^0 mixing from Belle

TL;DR

This paper reports recent measurements of D0-D0bar mixing and CP violation by the Belle experiment, including evidence for mixing and a precise determination of mass differences, based on extensive data analysis.

Contribution

It provides the latest experimental evidence for D0 mixing and CP violation, with improved precision in measuring mass differences using Belle data.

Findings

Evidence for D0-D0bar mixing phenomena

Most precise measurement of mass difference of D meson eigenstates

Observation of CP violation parameters in D meson decays

Abstract

We report on recent measurements of the $D^0-\bar{D}^0$ mixing and $CP$ violation parameters performed by the Belle experiment. The evidence for the mixing phenomena in the system of neutral $D$ mesons, arising in the study of $D^0\to K^+K^-, \pi^+\pi^-$ decays is presented first. Using a time dependent Dalitz analysis of $D^0\to K_S\pi^+\pi^-$ decays we also obtained the most precise up-to-date determination of the mass difference of the two $D$ meson mass eigenstates. The presented results are based on 540 fb$^{-1}$ of data recorded by the Belle detector at the KEKB $e^+e^-$ collider. We conclude with short prospects for the future measurements.