Study of ηπ0π0 systems in the E/l-meson mass range by the GAMS-4000 spectrometer

The results on partial-wave analysis of the ηπ0π0-system, formed in the charge-exchange reaction in the area of mass from 1 to 1.9 GeV, are presented. The ηπ0π0-system analysis was carried out on the basis of the isobar model with application of the Zemach representation for decay amplitudes. It is established that precise peaks are observed in the reaction π-p→ηπ0π0n by the pulse of 100 GeV/s and t > 0.15 (GeV/s)2 both from the η(1295)- and tη(1440)-mesons in the pseudo scaler sector and from the D/f1(1285)- and f1(1420)-mesons in the axial-vector sector