Production of the f0(980) resonance in the reaction π-p→π0π0n

Predictions of the model that relies on purely one-pion exchange and which describes well GAMS data on the rearrangement of the S-wave mass spectrum of the pi(0)pi(0) system in the region of the f(0)(980) resonance with increasing -t in the reaction pi(-)p --> pi(0) pi(0)n are compared with detailed data that were recently obtained at the Brookhaven National Laboratory (BNL) for the m and t distributions of the number of events of the reaction pi(-)p --> pi(0)pi(0)n. An analysis revealed that these BNL data disagree with the predictions of this model. This suggests that a different mechanism must be responsible for the phenomenon discovered experimentally. Most likely, this is the a(1)-exchange mechanism. (C) 2003 MAIK "Nauka/Interperiodica".