Chiral 4d string vacua with D-branes and NSNS and RR fluxes

TL;DR

This paper explores the construction of N=1 supersymmetric chiral string vacua in type IIB orientifolds with D-branes and fluxes, demonstrating moduli stabilization, gauge symmetry, and model building with explicit examples.

Contribution

It introduces new methods for building chiral N=1 supersymmetric models with fluxes and D-branes, including explicit constructions and topological insights.

Findings

Stable moduli achieved through flux-induced scalar potential

Explicit N=1 supersymmetric models with chiral matter

A non-supersymmetric SU(5) model with three families

Abstract

We discuss type IIB orientifolds with D-branes, and NSNS and RR field strength fluxes. The D-brane sectors lead to open string spectra with non-abelian gauge symmetry and charged chiral fermions. The closed string field strengths generate a scalar potential stabilizing most moduli. We describe the construction of N=1 supersymmetric models in the context of orientifolds of IIB theory on T^6/Z_2 x Z_2, containing D9-branes with world-volume magnetic fluxes, and illustrate model building possibilities with several explicit examples. We comment on a T-dual picture with D8-branes on non-Calabi-Yau half-flat geometries, and discuss some of the topological properties of such configurations. We also explore the construction of models with fluxes and with D3-branes at singularities and present a non-supersymmetric 3-family SU(5) model.