First measurements of J/Psi decays into $Σ^+ \barΣ^-$ and $Ξ^0 \barΞ^0$

Details First measurements of J/Psi decays into $Σ^+ \barΣ^-$ and $Ξ^0 \barΞ^0$ First measurements of J/Psi decays into $Σ^+ \barΣ^-$ and $Ξ^0 \barΞ^0$

2008-10-10

arxiv.org/abs/0810.1896v2

Phys.Rev.D78:092005,2008

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1103/PhysRevD.78.092005

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 ${\cal B}(J/Psi to \Sigma^+ \bar{\Sigma}^-)=(1.50\pm 0.10\pm 0.22)\times 10^{-3}$ and ${\cal B}(J/Psi to \Xi^0 \bar{\Xi}^0)=(1.20\pm 0.12\pm 0.21)\times 10^{-3}$, where the first errors are statistical and the second ones are systematic.

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