The S-Matrix of superstring field theory

Understand

We show that the classical S-matrix calculated from the recently proposed superstring field theories give the correct perturbative S-matrix.

• In the proof we exploit the fact that the vertices are obtained by a field redefinition in the large Hilbert space.
• The result extends to include the NS-NS subsector of type II superstring field theory and the recently found equations of motions for the Ramond fields.
• In addition, our proof implies that the S-matrix obtained from Berkovits' WZW-like string field theory then agrees with the perturbative S-matrix to all orders.