Symmetries and Feynman Rules for Ramond Sector in Open Superstring Field Theory

Understand

We examine the symmetries of the action suppelemented by the constraint in the WZW-type open superstring field theory.

• It is found that this pseudo-action has additional symmetries provided we impose the constraint after the transformation.
• Respecting these additional symmetries, we propose a prescription for the new Feynman rules for the Ramond sector.
• It is shown that the new rules reproduce the well-known on-shell four- and five-point amplitudes with external fermions.