First measurements of J/Psi decays into ${\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Xi }^0{\bar{\Xi }}^0$

Abstract

Based on 58 million J/Psi events collected with the BESII detector at the BEPC, the baryon pair processes J/Psi to ${\Sigma }^{+}{\bar{\Sigma }}^{-}$ and J/Psi to ${\Xi }^0{\bar{\Xi }}^0$ are observed for the first time. The branching fractions are measured to be $\mathcal{B}(J/Psito{\Sigma }^{+}{\bar{\Sigma }}^{-})=(1.50\pm 0.10\pm 0.22)\times 10^{-3}$ and $\mathcal{B}(J/Psito{\Xi }^0{\bar{\Xi }}^0)=(1.20\pm 0.12\pm 0.21)\times 10^{-3}$, where the first errors are statistical and the second ones are systematic.

15 pages, 5 figures, 2 tables. Submitted to Phys. ReV. D

References in corpus (3)

• Study of e+e- --> Lambda anti-Lambda, Lambda anti-Sigma0, Sigma0 anti-Sigma0 using Initial State Radiation with BABAR
• Measurements of psi(2S) decays to octet baryon-antibaryon pairs
• Measurements of $J/\psi$ and $\psi (2S)$ decays into $\Lambda \bar{\Lambda }{\pi }^0$ and $\Lambda \bar{\Lambda }\eta$

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• Determination of the relative phase in ψ' and J/ψ decays into baryon and antibaryon
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• Symmetry analysis of charmonium decays to two-baryon final state
• Symmetry analysis of charmonium two-body decay
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• A description of charmonia decays $J/\psi \to B\bar{B}$ within the QCD factorisation framework