S matrices for perturbed N=2 superconformal field theory from quantum groups

S-matrices for integrable perturbations of N = 2 superconformal field theories are studied. The models we consider correspond to perturbations of the coset theory Gk×Hg−hHk+g−h. The perturbed models are closely related to Ĝ-affine Toda theories with a background charge tuned to H. Using the quantum group restriction of the affine Toda theories we derive the S-matrix.