Nonperturbative yukawa couplings from string instantons |
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| Authors: | Blumenhagen Ralph Cvetic Mirjam Lüst Dieter Richter Robert Weigand Timo |
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| Affiliation: | Max-Planck-Institut für Physik, F?hringer Ring 6, 80805 München, Germany. |
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| Abstract: | Nonperturbative D-brane instantons can generate perturbatively absent though phenomenologically relevant couplings for type II orientifold compactifications with D-branes. We discuss the generation of the perturbatively vanishing SU(5) GUT Yukawa coupling of type <10 10 5(H)>. Moreover, for a simple globally consistent intersecting D6-brane model, we discuss the generation of mass terms for matter fields. This can serve as a mechanism for decoupling exotic matter. |
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