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

M. Ablikim

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…