Coherent pi (+)pi (-)pi (-) production in the interactions of a beam of 600
GeV pi (-) mesons with C, Cu and Pb nuclei has been studied with the SELEX
facility (Experiment E781 at Fermilab). The a(2)(1320) meson signal has bee
n detected in the Coulomb (low q(2)) region. The Primakoff formalism used t
o extract radiative decay width of this meson yields Gamma = 284 +/- 25 +/-
25 keV, which is the most precise measurement to date. (C) 2001 Elsevier S
cience B.V. All rights reserved.