Dyonic integrable models

A class of non-abelian affine Toda models arising from the axial gauged two -loop WZW model is presented. Their zero curvature representation is constr ucted in terms of a graded Kac-Moody algebra. It is shown that the discrete multivacua structure of the potential together with non-abelian nature of the zero grade subalgebra allows soliton solutions with non-trivial electri c and topological charges. The dressing transformation is employed to expli citly construct one and two soliton solutions and their bound states in ter ms of the tau functions. A discussion of the classical spectra of such solu tions and the time delays are given in detail. (C) 2001 Elsevier Science B. V. All rights reserved.