Measurement of $D^0 – \bar D^0$ mixing and search for CP violation in $D^0 \to K^+ K^−, \pi^+ \pi^−$ decays with the full Belle data set

摘要: 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.