Study of pi pi final state interactions in psi(2S) -> pi(+)pi(-)J/psi

The pi(+)pi(-)transition of heavy quarkonia in decay psi(2S) ->pi(+)pi(-)J/psi is studied. With the BESII data on the decay psi(2S) ->pi(+)pi(-)J/psi, we update the values of coupling constants (g(i)) and chromopolarizability (alpha(psi(2S)J/psi)) in this process.