Non-perturbative Yukawa Couplings from String Instantons

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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

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High Energy Physics - Theory, High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/193115

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.1871
 http://arxiv.org/abs/0707.1871
 Phys.Rev.Lett.100:061602,2008
 doi:10.1103/PhysRevLett.100.061602

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arXiv