Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-10-10
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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