2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38239We present data on coherent production of the pi-pi-pi+ system by 600 GeV pion beam for the C, Cu and Pb targets. The Primakoff formalism was used for extracting the radiatve width of the a2 meson. We obtain a preliminary value Γ(a2->pi+gamma)=225+/-25(stat)+/-45(syst) keV.5 pages, 2 figures (postscript). Talk,presented by V.Kubarovsky at the 1998 International Conference on High Energy Physics, Vancouver, B.C., Canada, July 1998. To be published in the proceedingsHigh Energy Physics - Experimenttext