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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 5H). 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.
Blumenhagen, R., Cvetič, M., Lüst, D., Richter, R., & Weigand, T. (2008). Nonperturbative Yukawa Couplings from String Instantons. Retrieved from http://repository.upenn.edu/physics_papers/103
Date Posted: 25 January 2011
This document has been peer reviewed.