Non-perturbative Yukawa Couplings from String Instantons

Abstract

Non-perturbative 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.

4 pages, 2 tables, 2 figures

References in corpus (4)

• Computation of D-brane instanton induced superpotential couplings - Majorana masses from string theory
• D-brane Instantons on the T^6/Z_3 orientifold
• Non-perturbative and Flux superpotentials for Type I strings on the Z_3 orbifold
• Thresholds for Intersecting D-branes Revisited

Cited by in corpus (5)

• Power Towers of String Instantons for N=1 Vacua
• Hierarchies from D-brane instantons in globally defined Calabi-Yau Orientifolds
• String instantons, fluxes and moduli stabilization
• On the Geometry of Metastable Supersymmetry Breaking
• D-brane instanton effects in Type II orientifolds: local and global issues