Nonperturbative Superpotentials in String Theory


We describe a class of 4d N=1 compactifications of the SO(32) heterotic/type I string theory which are destabilized by nonperturbatively generated superpotentials. In the type I description, the destabilizing superpotential is generated by a one instanton effect or gaugino condensation in a nonperturbative SU(2) gauge group. The dual, heterotic description… (More)