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Observation of D⁰⁽⁺⁾to K⁰_Sπ⁰⁽⁺⁾η^prime and improved measurement of D⁰to K^-π^+η^prime
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arxiv 1809.03750 v2 pith:LYL6QY2T submitted 2018-09-11 hep-ex
Observation of D⁰⁽⁺⁾to K⁰_Sπ⁰⁽⁺⁾η^prime and improved measurement of D⁰to K^-π^+η^prime
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By analyzing $2.93\ \rm fb^{-1}$ of data taken at a center-of-mass energy of 3.773~GeV with the BESIII detector, we measure the branching fractions of the Cabibbo-favored hadronic decays $D^0\to K^-\pi^+\eta^\prime$, $D^0\to K^0_S\pi^0\eta^\prime$ and $D^+\to K^0_S\pi^+\eta^\prime$, which are determined to be $(6.43 \pm 0.15_{\rm stat.} \pm 0.31_{\rm syst.})\times 10^{-3}$, $(2.52 \pm 0.22_{\rm stat.} \pm 0.15_{\rm syst.})\times 10^{-3}$ and $(1.90 \pm 0.17_{\rm stat.} \pm 0.13_{\rm syst.})\times 10^{-3}$, respectively. The precision of the branching fraction of $D^0\to K^-\pi^+\eta^\prime$ is significantly improved, and the processes $D^0\to K^0_S\pi^0\eta^\prime$ and $D^+\to K^0_S\pi^+\eta^\prime$ are observed for the first time.
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