First Evidence of Lambda Lambda-bar in cJ Decays
Abstract
The first observation of cJ (J=0,1,2) decays to Lambda Lambda-bar is reported using (2S) data collected with the BESII detector at the BEPC. The branching ratios are determined to be BR(c0 Lambda Lambda-bar) = (4.7+1.3-1.2 1.0)× 10-4, BR(c1 Lambda Lambda-bar) = (2.6+1.0-0.9 0.6)× 10-4 and BR(c2 Lambda Lambda-bar) = (3.3+1.5-1.3 0.7)× 10-4. Results are compared with model predictions.
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