Metastable SUSY breaking, de Sitter moduli stabilisation and Kähler moduli inflation

Sven Krippendorf, Fernando Quevedo

Research output: Contribution to journalArticlepeer-review


We study the influence of anomalous U(1) symmetries and their associated D-terms on the vacuum structure of global field theories once they are coupled to = 1 supergravity and in the context of string compactifications with moduli stabilisation. In particular, we focus on a IIB string motivated construction of the ISS scenario and examine the influence of one additional U(1) symmetry on the vacuum structure. We point out that in the simplest one-Kähler modulus compactification, the original ISS vacuum gets generically destabilised by a runaway behaviour of the potential in the modulus direction. In more general compactifications with several Kähler moduli, we find a novel realisation of the LARGE volume scenario with D-term uplifting to de Sitter space and both D-term and F-term supersymmetry breaking. The structure of soft supersymmetry breaking terms is determined in the preferred scenario where the standard model cycle is not stabilised non-perturbatively and found to be flavour universal. Our scenario also provides a purely supersymmetric realisation of Kähler moduli (blow-up and fibre) inflation, with similar observational properties as the original proposals but without the need to include an extra (non-SUSY) uplifting term.

Original languageEnglish (US)
Article number039
JournalJournal of High Energy Physics
Issue number11
StatePublished - 2009


  • Strings and branes phenomenology

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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