D=4 gauge theory correlators from D=10 NSR sigma-model

In our previous work (hep-th/9812044) we have proposed the sigma-model acti on, conjectured to be the NSR analogue of superstring theory on AdS(5) x S- 5. This sigma-model is the NSR superstring action with potential term corre sponding to the exotic 5-form vertex operator (branelike state). This 5-for m potential plays the role of cosmological term, effectively curving the fl at space-time geometry to that of AdS(5) x S-5. In this paper we study this ansatz in more details and provide the derivation of the correlators of th e four-dimensional super Yang-Mills theory from the above mentioned sigma-m odel. In particular, we show that the correlation function of two dilaton v ertex operators in such a model reproduces the well-known result of the two -point function in the N = 4 four-dimensional super Yang-Mills theory: [F-2 (x)F-2(y)] similar to N-2/\x similar to y/(8). (C) 1999 Published by Elsevi er Science B.V. All rights reserved.