Moduli Stabilization in Type IIB Flux Compactifications

TL;DR

This paper reexamines moduli stabilization in Type IIB flux compactifications, showing that stable or metastable vacua can exist without uplifting, depending on flux parameters and detailed potential analysis.

Contribution

It introduces a modified two-step procedure for analyzing moduli stabilization, incorporating full superpotential and flux effects to identify stable vacua.

Findings

Stable supersymmetric AdS vacua are not guaranteed in these models.

Metastable or stable minima can lead to deSitter vacua without uplifting.

Flux parameters critically influence the existence of stable vacua.

Abstract

In the present paper, we reexamine the moduli stabilization problem of the Type IIB orientifolds with one complex structure modulus in a modified two-step procedure. The full superpotential including both the 3-form fluxes and the non-perturbative corrections is used to yield a F-term potential. This potential is simplified by using one optimization condition to integrate the dilaton field out. It is shown that having a locally stable supersymmetric Anti-deSitter vacuum is not inevitable for these orientifolds, which depend strongly upon the details of the flux parameters. For those orientifolds that have stable/metastable supersymmetry-broken minima of the F-term potential, the deSitter vacua might emerge even without the inclusion of the uplifting contributions.