Measurement of D0-D0bar mixing and search for CP violation in D0 -> K+K-, pi+pi- decays with the full Belle data set

TL;DR

This paper presents an improved measurement of D0-D0bar mixing and a search for CP violation in D0 decays to K+K- and pi+pi- using the full Belle data set, providing precise results that test the Standard Model predictions.

Contribution

It offers the most precise measurements to date of D0-D0bar mixing parameters and CP violation in these decay modes, utilizing the complete Belle dataset.

Findings

Measured y_CP with high precision, indicating mixing.

Found no significant evidence of CP violation in D0 decays.

Results are consistent with Standard Model expectations.

Abstract

We report an improved measurement of D0-D0bar mixing and a search for CP violation in D0 decays to CP-even final states K+K- and pi+pi-. The measurement is based on the final Belle data sample of 976/fb. The results are y_CP=(1.11 +- 0.22 +- 0.09)% and A_Gamma=(-0.03 +- 0.20 +- 0.07)%, where the first uncertainty is statistical and the second is systematic.