Search for CP violation in $D^0 \to K^+K^-,\pi^+\pi^-$ and $D^0 \to \pi^0\pi^0$

TL;DR

This paper presents updated measurements of CP violation in D0 meson decays to kaons and pions, including the first measurements for neutral pions, using the complete Belle dataset.

Contribution

It provides the first measurements of CP asymmetry in D0 to pi0 pi0 decays and updates previous results for other decay modes with the full Belle data.

Findings

No significant CP violation observed in the studied decays.

Improved precision in CP asymmetry measurements compared to previous results.

First measurement of CP asymmetry in D0 to pi0 pi0 decays.

Abstract

We report updated measurements of indirect and direct CP asymmetry in decays $D^0 \to K^+K^-,\pi^+\pi^-$ and a new measurement of direct and indirect CP asymmetry in decays $D^0 \to \pi^0\pi^0$, using the full data sample of the Belle experiment.