Volume stabilization via aα′ corrections in type IIB theory with fluxes

Abstract

We consider the type IIB string theory in the presence of various extra 7/7̄brane pairs compactified on a warped Calabi-Yau threefold that admits a conifold singularity. We demonstrate that the volume modulus can be stabilized perturbatively at a non-supersymmetric AdS4/dS4 vacuum by the effective potential that includes the stringy (α′)3 correction obtained by Becker et al. together with a combination of positive tension and anomalous negative tension terms generated by the additional 7-brano-antibrane pairs. © SISSA 2005.