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String Theory and Particle Physics by Angel M. Uranga, Luis E. Ibáñez

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14

Flux compatifications and moduli stabilization

In all string compactifications studied in previous chapters, the massless spectrum contains a large number of moduli, including the dilaton and the CY geometric moduli. These are problematic, as they couple to matter particles and easily lead to deviations from universality of gravitational interactions (fifth forces), which have not been observed experimentally. Therefore, any serious attempt to reproduce realistic string models of particle physics and/or cosmology, must address the issue of moduli stabilization; namely, the generation of a scalar potential fixing the vevs of the moduli fields and giving them large enough masses to overcome such phenomenological problems. In this chapter we ...

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