Measurement of branching fractions and CP asymmetries for ds+ →k+ (η,π0) and ds+ →π+ (η,π0) decays at belle.

Abstract

We report measurements of the branching fractions and CP asymmetries for Dþ s → Kþη, Dþ s → Kþπ0, and Dþ s → πþη decays, and the branching fraction for Dþ s → πþπ0. Our results are based on a data sample corresponding to an integrated luminosity of 921 fb−1 collected by the Belle detector at the KEKB eþe− asymmetric-energy collider. Our measurements of CP asymmetries in these decays are the most precise to date; no evidence for CP violation is found.