Yangian superalgebras in conformal field theory

The main examples are sigma models of the supergroups PSL(N|N), OSP(2N+2|2N) and D(2,1;α) away from the WZW point. Further there are the OSP(2N+2|2N) Gross-Neveu models and current-current perturbations of ghost systems, both for the disc as world-sheet. The latter we show to be equivalent to CPN−1|N sigma models, while the former are conjecturally dual to supersphere sigma models.