Measurements of psi(2S) decays to octet baryon-antibaryon pairs

Details Measurements of psi(2S) decays to octet baryon-antibaryon pairs Measurements of psi(2S) decays to octet baryon-antibaryon pairs

2006-10-26

arxiv.org/abs/hep-ex/0610079v2

Phys.Lett.B648:149-155,2007

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 8 figures

Scientific paper

10.1016/j.physletb.2007.02.029

With a sample of 14 million psi(2S) events collected by the BESII detector at the Beijing Electron Positron Collider (BEPC), the decay channels psi(2S)->p p-bar, Lambda Lambda-bar, Sigma0 Sigma0-bar, Xi Xi-bar are measured, and their branching ratios are determined to be (3.36+-0.09+-0.24)*10E-4, (3.39+-0.20+-0.32)*10E-4, (2.35+-0.36+-0.32)*10E-4, (3.03+-0.40+-0.32)*10E-4, respectively. In the decay psi(2S)->p p-bar, the angular distribution parameter alpha is determined to be 0.82+-0.17+-0.04.

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