Measurement of Branching Fractions of $J/\psi$ and $\psi (3686)$ decays to ${\Sigma }^{+}$ and ${\overline{\Sigma }}^{-}$

Abstract

Using $1310.6\times 10^6$ $J/\psi$ and $448.1\times 10^6$ $\psi (3686)$ events collected with the BESIII detector, the branching fractions of $J/\psi$ and $\psi (3686)$ decays to ${\Sigma }^{+}{\overline{\Sigma }}^{-}$ are measured to be $(10.61\pm 0.04\pm 0.36)\times 10^{-4}$ and $(2.52\pm 0.04\pm 0.09)\times 10^{-4}$, respectively. In addition, the ratio of $\mathcal{B}(\psi (3686)\to {\Sigma }^{+}{\overline{\Sigma }}^{-})/\mathcal{B}(J/\psi \to {\Sigma }^{+}{\overline{\Sigma }}^{-})$ is determined to be $(23.8\pm 1.1)\%$ which violates the "$12\%$ rule".

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Cited by in corpus (4)

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• Observation of $\psi (3686)\to \gamma \eta (1405)$ via $\eta (1405)\to f_0(980){\pi }^0$
• Spin identification of the mono-Z${}^{\prime }$ resonance in muon-pair production at the ILC with simulated electron-positron collisions at $\sqrt{s}$ = 500 GeV