arXiv:0707.1871·v1·High Energy Physics — Theory
Non-perturbative Yukawa Couplings from String Instantons
Ralph Blumenhagen🇩🇪 · Mirjam Cvetic🇺🇸 · Dieter Lust🇩🇪 · Robert Richter🇺🇸 · Timo Weigand🇺🇸
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.
Comments: 4 pages, 2 tables, 2 figures