paper

Non-Perturbative Superpotentials In String Theory

arXiv:hep-th/9604030 · doi:10.1016/0550-3213(96)00283-0

Abstract

The non-perturbative superpotential can be effectively calculated in -theory compactification to three dimensions on a Calabi-Yau four-fold . For certain , the superpotential is identically zero, while for other , a non-perturbative superpotential is generated. Using -theory, these results carry over to certain Type IIB and heterotic string compactifications to four dimensions with supersymmetry. In the heterotic string case, the non-perturbative superpotential can be interpreted as coming from space-time and world-sheet instantons; in many simple cases contributions come only from finitely many values of the instanton numbers.

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