A flux-scaling scenario for moduli stabilization and axion inflation in string theory

Abstract

We describe a type IIB string scenario in which tree-level moduli stabilization via geometric and non-geometric fluxes is achieved. We present stable non-supersymmetric vacua with all moduli fixed except for some massless axions. The moduli vacuum expectation values and their masses feature a specific scaling with the fluxes thereby allowing for parametric control. We discuss some phenomenological aspects of our scenario and explain how it provides an interesting framework for realizing inflation in string theory.

Two‐Field Axion Inflation and the Swampland Constraint in the Flux‐Scaling Scenario

“…However, in order to have a physical consistent frame, it is necessary to have some hierarchies on the different scales as where θ is the inflaton. The flux‐scaling scenario establishes a mechanism to accomplish all the above requirements by having a parametrical control of the different scales and mass of the moduli by the presence of different kind of fluxes which precisely generates a perturbative tree‐level superpotential on moduli. Roughly speaking, it is required a model with a symmetric superpotential on n complex fields in the presence of real fluxes.…”

Leaving the Swampland: non-geometric fluxes and the distance conjecture

“…Non-geometric fluxes have also been studied in the context of the flux-scaling scenario in order to have some parametrical control to generate almost flat directions in moduli space, testing wether inflationary directions and stabilization of all moduli come along [52,53,56,57]. This approach was followed in the context of F-term axion monodromy inflation [58,59] (see [60][61][62][63] for relations among the flux-scaling scenario, hierarchy on moduli mass and the Swampland).…”