QUANTUM AFFINE SYMMETRY AND SCATTERING-AMPLITUDES OF THE IMAGINARY COUPLED D(4)((3)) AFFINE TODA FIELD-THEORY

An exact S-matrix is conjectured for the imaginary coupled d(4)((3)) a ffine Toda field theory, using the U-q(g(2)((1))) symmetry. It is show n that this S-matrix is consistent with the results for the case of re al coupling using the breather-particle correspondence. For q a root o f unity it is argued that the theory can be restricted to yield Phi(11 /14) perturbations of WA(2) minimal models and the restriction is perf ormed for the (3,p') minimal models. (C) 1997 Published by Elsevier Sc ience B.V.