Abstract
We consider NSR superstring in AdS3⊗S3⊗R4 background. The action is expressed in terms of the variables on the group manifolds SL (2, R) and SU(2) as (1+1)-dimensional σ-models with Wess–Zumino terms, associated with AdS3 and S3 respectively. R4 is the flat Euclidean space. We show the existence of classical nonlocal conserved currents in the superspace formulation for the nonlinear σ-model with WZ term in the context of NSR string. We propose Ward identities utilizing existence of the nonlocal conserved currents.
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