English

First Evidence of Lambda Lambda-bar in \chi_cJ Decays

High Energy Physics - Experiment 2008-11-26 v1
Authors: BES Collaboration , J. Z. Bai
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Abstract

The first observation of \chi_cJ (J=0,1,2) decays to Lambda Lambda-bar is reported using \psi(2S) data collected with the BESII detector at the BEPC. The branching 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 model predictions.

Keywords

hadron decays branching fraction b meson physics

Cite

@article{arxiv.hep-ex/0304012,
  title  = {First Evidence of Lambda Lambda-bar in \chi_cJ Decays},
  author = {BES Collaboration and J. Z. Bai},
  journal= {arXiv preprint arXiv:hep-ex/0304012},
  year   = {2008}
}

Comments

18 pages, 8 figures, submitted to Phys. Rev. D

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