NEW PROPOSALS FOR THE REACTION E+E--]PI+PI-PI-0

The influence of the singularity of the triangle diagram on patterns of rhoomega interference in the pi+pi- mass spectrum of the reaction e+e- --> pi+pi-pi0 is considered at energies in the range 0.95 GeV less-than-or-equal-to square-root s less-than-or-equal-to 1.4 GeV. This influence arises due to the difference between the phases of the omega --> rhopi and rho --> omegapi transition amplitudes implied by the imaginary part of this diagram. The decay kinematics of the triangle diagram results in the distortion of the pi+pi- mass spectrum. Taking this diagram into account at energies in between omega and phi peaks implies the measurable decrease of the cross section. Experimental studies of the effect of the imaginary part of the triangle diagram at e+e-colliders with the luminosity L = 10(31) cm-2s-1 or higher could be of great interest as a tool for testing the self-consistency of calculations going beyond the tree approximation and as the possibility of obtaining additional information on the mechanism of breaking of the OZI rule and G parity.