Abstract
The density superfield and Einstein action for two-dimensional (2,0) supergravity are derived. The irreducible superfields of the heterotic string are discussed, and they are coupled to (2,0) supergravity. The locally (2,0) supersymmetric action for the heterotic string is presented in both superfields and component fields. For flat world sheet geometry, the globally (2,0) supersymmetric non-linear sigma model, and the associated Virasoro constraints, are derived. This formalism is applicable to ( p,0) supersymmetry for any positive integer p.
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