de Sitter vacua from an anomalous gauge symmetry
Wilfried Buchmuller, Markus Dierigl, Fabian Ruehle, Julian Schweizer
TL;DR
This paper introduces a new class of metastable de Sitter solutions in six-dimensional supergravity compactifications, utilizing anomalous U(1) gauge symmetries, fluxes, and nonperturbative effects to stabilize moduli.
Contribution
It presents a novel mechanism for achieving metastable de Sitter vacua through anomalous gauge symmetries and flux-induced Fayet-Iliopoulos terms in string-inspired supergravity models.
Findings
Identification of metastable de Sitter solutions in 6D supergravity
Demonstration of moduli stabilization via fluxes and nonperturbative effects
Analysis of gauge anomaly cancellation and its role in vacuum structure
Abstract
We find a new class of metastable de Sitter solutions in compactifications of six-dimensional supergravity motivated by type IIB or heterotic string vacua. Two Fayet-Iliopoulos terms of a local U(1) symmetry are generated by magnetic flux and by the Green-Schwarz term canceling the gauge anomalies, respectively. The interplay between the induced D-term, the moduli dependence of the effective gauge coupling, and a nonperturbative superpotential stabilizes the moduli and determines the size of the extra dimensions.
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