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Measurements of the branching fractions for D^+to K⁰_SK⁰_SK^+, K⁰_SK⁰_Sπ^+ and D⁰to K⁰_SK⁰_S, K⁰_SK⁰_SK⁰_S
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arxiv 1611.04260 v2 pith:7FL62556 submitted 2016-11-14 hep-ex
Measurements of the branching fractions for D^+to K⁰_SK⁰_SK^+, K⁰_SK⁰_Sπ^+ and D⁰to K⁰_SK⁰_S, K⁰_SK⁰_SK⁰_S
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By analyzing $2.93\ \rm fb^{-1}$ of data taken at the $\psi(3770)$ resonance peak with the BESIII detector, we measure the branching fractions for the hadronic decays $D^+\to K^0_SK^0_S K^+$, $D^+\to K^0_SK^0_S \pi^+$, $D^0\to K^0_S K^0_S$ and $D^0\to K^0_SK^0_SK^0_S$. They are determined to be ${\mathcal B}(D^+\to K^0_SK^0_SK^+)=(2.54 \pm 0.05_{\rm stat.} \pm 0.12_{\rm sys.})\times 10^{-3}$, ${\mathcal B}(D^+\to K^0_SK^0_S\pi^+)=(2.70 \pm 0.05_{\rm stat.} \pm 0.12_{\rm sys.})\times 10^{-3}$, ${\mathcal B}(D^0\to K^0_SK^0_S)=(1.67 \pm 0.11_{\rm stat.} \pm 0.11_{\rm sys.})\times 10^{-4}$ and ${\mathcal B}(D^0\to K^0_SK^0_SK^0_S)=(7.21 \pm 0.33_{\rm stat.} \pm 0.44_{\rm sys.})\times 10^{-4}$, where the second one is measured for the first time and the others are measured with significantly improved precision over the previous measurements.
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