The Gauged (2,1) Heterotic Sigma-Model

Abstract The geometry of (2, 1) supersymmetric sigma models with isometry symmetries is discussed. The gauging of such symmetries in superspace is then studied. We find that the coupling to the (2, 1) Yang-Mills supermultiplet can be achieved provided certain geometric conditions are satisfied. We construct the general gauged action, using an auxiliary vector to generate the full non-polynomial structure.