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Measurements of J/psi Decays into 2(pi+pi-)eta and 3(pi+pi-)eta

M. Ablikim
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Abstract

Based on a sample of 5.8X 10^7 J/psi events taken with the BESII detector, the branching fractions of J/psi--> 2(pi+pi-)eta and J/psi-->3(pi+pi-)eta are measured for the first time to be (2.26+-0.08+-0.27)X10^{-3} and (7.24+-0.96+-1.11)X10^{-4}, respectively.

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M. Ablikim. 2004-11-24. Measurements of J/psi Decays into 2(pi+pi-)eta and 3(pi+pi-)eta. https://doi.org/10.1016/j.physletb.2005.02.004

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