Moduli stabilization in type IIB orientifolds (II) Original Research Article

We discuss general properties of moduli stabilization in KKLT scenarios in type IIB orientifold compactifications image. In particular, we find conditions for the Kähler potential to allow a KKLT scenario for a manifold image without complex structure moduli, i.e. image. This way, a whole class of type IIB orientifolds with image is ruled out. This excludes in particular all image- and image-orientifolds image with image for a KKLT scenario. This concerns image, image, image, image, image and image-both at the orbifold point and away from it. Furthermore, we propose a mechanism to stabilize the Kähler moduli associated to the odd cohomology image. In the second part of this work we discuss the moduli stabilization of resolved type IIB image- or image-orbifold/orientifold compactifications. As examples for the resolved image and image orbifolds we fix all moduli through a combination of fluxes and racetrack superpotential.