Journal of High Energy Physics

, 2010:56

Stabilizing all Kähler moduli in type IIB orientifolds


  • Konstantin Bobkov
    • Department of PhysicsThe Ohio State University
    • Dublin Institute for Advanced Studies
  • Piyush Kumar
    • Department of PhysicsUniversity of California, Theoretical Physics Group, Lawrence Berkeley National Laboratory
  • Stuart Raby
    • Department of PhysicsThe Ohio State University
Open AccessArticle

DOI: 10.1007/JHEP12(2010)056

Cite this article as:
Bobkov, K., Braun, V., Kumar, P. et al. J. High Energ. Phys. (2010) 2010: 56. doi:10.1007/JHEP12(2010)056


We describe a simple and robust mechanism that stabilizes all Kähler moduli in Type IIB orientifold compactifications. This is shown to be possible with just one non-perturbative contribution to the superpotential coming from either a D3-instanton or D7-branes wrapped on an ample divisor. This moduli-stabilization mechanism is similar to and motivated by the one used in the fluxless G 2 compactifications of M theory. After explaining the general idea, explicit examples of Calabi-Yau orientifolds with one and three Kähler moduli are worked out. We find that the stabilized volumes of all two-and four-cycles as well as the volume of the Calabi-Yau manifold are controlled by a single parameter, namely, the volume of the ample divisor. This feature would dramatically constrain any realistic models of particle physics embedded into such compactifications. Broad consequences for phenomenology are discussed, in particular the dynamical solution to the strong CP-problem within the framework.


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