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The first observation of \chi_cJ (J=0,1,2) decays to Lambda Lambda-bar isreported using \psi(2S) data collected with the BESII detector at the BEPC. Thebranching ratios are determined to be BR(\chi_c0 \to Lambda Lambda-bar) =(4.7^{+1.3}_{-1.2} \pm 1.0)\times 10^{-4}, BR(\chi_c1 \to Lambda Lambda-bar) =(2.6^{+1.0}_{-0.9} \pm 0.6)\times 10^{-4} and BR(\chi_c2 \to Lambda Lambda-bar)= (3.3^{+1.5}_{-1.3} \pm 0.7)\times 10^{-4}. Results are compared with modelpredictions.Comment: 18 pages, 8 figures, submitted to Phys. Rev.

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

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