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The decay of Ψ′ → Ψ + ππ is described by a chiral ε model. The general features of the observed dipion spectrum are well reproduced. Comparison with the hadronic decay ρ′ → ρ + ππ indicates that the Ψ′Ψε coupling is relatively suppressed by a factor ∼10-2.
Keywords: high energy, hadrons, unstable particles, chiral symmetry, propagation functions
