Hierarchies from \(D\)-brane instantons in globally defined Calabi-Yau orientifolds. (English) Zbl 1228.81226
Summary: We construct the first globally consistent semirealistic type I string vacua on an elliptically fibered manifold where the zero modes of the Euclidean \(D1\)-instanton sector allow for the generation of nonperturbative Majorana masses of an intermediate scale. In another class of global models, a \(D1\)-brane instanton can generate a Polonyi-type superpotential breaking supersymmetry at an exponentially suppressed scale.
MSC:
| 81T30 | String and superstring theories; other extended objects (e.g., branes) in quantum field theory |
| 14J32 | Calabi-Yau manifolds (algebro-geometric aspects) |
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