The Tachyon Potential in Open Neveu-Schwarz String Field Theory

Abstract

A classical action for open superstring field theory has been proposed which does not suffer from contact term problems. After generalizing this action to include the non-GSO projected states of the Neveu-Schwarz string, the pure tachyon contribution to the tachyon potential is explicitly computed. The potential has a minimum of $V=-\frac{1}{32g^2}$ which is 60% of the predicted exact minimum of $V=-\frac{1}{2{\pi }^2{g}^2}$ from D-brane arguments.

Corrected typos and brane-antibrane mass. Pure tachyon contribution is 60% of predicted exact result. Added references

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