Constructing de Sitter vacua in no-scale string models without uplifting

Abstract

We develop a method for constructing metastable de Sitter vacua in N=1 supergravity models describing the no-scale volume moduli sector of Calabi-Yau string compactifications. We consider both heterotic and orientifold models. Our main guideline is the necessary condition for the existence of metastable vacua coming from the Goldstino multiplet, which constrains the allowed scalar geometries and supersymmetry-breaking directions. In the simplest non-trivial case where the volume is controlled by two moduli, this condition simplifies and turns out to be fully characterised by the intersection numbers of the Calabi-Yau manifold. We analyse this case in detail and show that once the metastability condition is satisfied it is possible to reconstruct in a systematic way the local form of the superpotential that is needed to stabilise all the fields. We apply then this procedure to construct some examples of models where the superpotential takes a realistic form allowed by flux backgrounds and gaugino condensation effects, for which a viable vacuum arises without the need of invoking corrections to the Kahler potential breaking the no-scale property or uplifting terms. We finally discuss the prospects of constructing potentially realistic models along these lines.

25 pages; v2: comments added, typos corrected, references added (version to appear in JHEP)

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• Metastable SUSY Breaking, de Sitter Moduli Stabilisation and Kähler Moduli Inflation
• Note on moduli stabilization, supersymmetry breaking and axiverse
• Cosmic inflation in a landscape of heavy-fields
• De Sitter Vacua in No-Scale Supergravity
• The Boundaries of KKLT
• De Sitter Vacua from Non-perturbative Flux Compactifications
• Systematics of Type IIA moduli stabilisation
• Metastable supersymmetry breaking in extended supergravity
• Low-scale SUSY breaking and the (s)goldstino physics
• The everpresent eta-problem: knowledge of all hidden sectors required
• Perturbative Stability along the Supersymmetric Directions of the Landscape
• Towards a complete mass spectrum of type-IIB flux vacua at large complex structure
• The lightest scalar in theories with broken supersymmetry
• De Sitter Space in Gauge/Gravity Duality
• de Sitter vacua from an anomalous gauge symmetry
• Scalar geometry and masses in Calabi-Yau string models
• Finite temperature effects in modular cosmology
• Effects of heavy modes on vacuum stability in supersymmetric theories
• F-term Uplift in Heterotic M-theory
• Early Universe Cosmology, Effective Supergravity, and Invariants of Algebraic Forms