Search for {CP} violation in $D^0 \\to \\pi^0 \\pi^0$ decays
Journal
Physics Review Letters
Journal Volume
112
Pages
211601
Date Issued
2014-04
Author(s)
Nisar, N. K.
Abstract
We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. The asymmetry obtained in the rate of D0 and D¯0 decays to the π0π0 final state, [-0.03 ± 0.64(stat) ± 0.10(syst)]%, is consistent with no CP violation. This constitutes an order of magnitude improvement over the existing result. We also present an updated measurement of the CP asymmetry in the D0 → K0 Sπ0 decay: ACP (D0 → K0 Sπ0) [-0.21 ± 0.16(stat) ± 0.07(syst)]%.
Type
journal article