Nonperturbative Yukawa couplings from string instantons

作者：Blumenhagen Ralph^*; Cvetic Mirjam; Luest Dieter; Richter Robert; Weigand Timo

来源：Physical Review Letters, 2008, 100(6): 061602.

DOI：10.1103/PhysRevLett.100.061602

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.

• 出版日期2008-2-15