Moduli stabilization in chiral type IIB orientifold models with fluxes Original Research Article

We consider type IIB orientifold models on Calabi–Yau spaces with three-form G-flux turned on. These fluxes freeze some of the complex structure moduli and the complex dilaton via an F-term scalar potential. By introducing pairs of D9–D9 branes with Abelian magnetic fluxes it is possible to freeze also some of the Kähler moduli via a D-term potential. Moreover, such magnetic fluxes in general lead to chiral fermions, which make them interesting for string model-building. These issues are demonstrated in a simple toy model based on a Z2×Z2′ orbifold.