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- W4377371502 abstract "We search for $CP$ violation by measuring a $T$-odd asymmetry in the Cabibbo-suppressed $D^{+}rightarrow K^{+}K^{0}_{S}pi^{+}pi^{-} $ decay, and in the Cabibbo-favored $D^{+}_{s}rightarrow K^{+}K^{0}_{S}pi^{+}pi^{-}$ and $D^{+}rightarrow K^{+}K^{-}K^{0}_{S}pi^{+}$ decays. We use 980 ${rm fb}^{-1}$ of data collected by the Belle detector running at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The $C!P$-violating $T$-odd parameter ${a}^{Ttext{-}rm{odd}}_{CP}$ is measured to be ${a}^{Ttext{-}rm{odd}}_{CP}(D^{+}rightarrow K^{+}K^{0}_{S}pi^{+}pi^{-})=(0.34pm0.87pm0.32)%,$ ${a}^{Ttext{-}rm{odd}}_{CP}(D^{+}_{s}rightarrow K^{+}K^{0}_{S}pi^{+}pi^{-})=(-0.46pm0.63pm0.38)%,$ and ${a}^{Ttext{-}rm{odd}}_{CP}(D^{+}rightarrow K^{+}K^{-}K^{0}_{S}pi^{+})=(-3.34pm2.66pm0.35)%,$ where the first uncertainty is statistical and the second is systematic. We also report the first observation of the Cabibbo-suppressed decay $D^{+}_{s}rightarrow K^{+}K^{-}K^{0}_{S}pi^{+}$. The branching fraction is measured relative to that of the analogous Cabibbo-favored decay : $B(D^{+}_{s}rightarrow K^{+}K^{-}K^{0}_{S}pi^{+}) / B(D^{+}_{s}rightarrow K^{+}K^{0}_{S}pi^{+}pi^{-}) = (1.36pm 0.15pm 0.04)%$." @default.
- W4377371502 created "2023-05-23" @default.
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