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Background formalism for superstring field theory
Authors:I. Ya. Aref'eva

P. B. Medvedev

A. P. Zubarev

Affiliation:

Steklov Mathematical Institute, Vavilov St. 42, GSP-1, SU-117 966, Moscow, USSR

Institute of Theoretical and Experimental Physics, SU-117 259, Moscow, USSR

Tomsk State University, SU-634 010, Tomsk, USSR

Abstract:In the framework of the background formalism we analyse possible versions of the Witten-type NSR superstring field theory. We find the picture for string fields to be uniquely fixed by the requirement that the perturbative classical solutions are well-defined. This uniquely defined picture and the corresponding action are different from the ones in Witten's theory and coincide with the ones proposed from different reasons in our previous paper. Following the same background method we calculate the tree-level scattering amplitudes for the new action and argue that in contrast to the ones in Witten's original theory, the amplitudes are singularity-free and hence there is no need to add any tree-level counterterms. We also prove the amplitudes to reproduce correctly the first quantized results.
Keywords:
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