D-branes at del Pezzo singularities: Global embedding and moduli stabilisation

Michele Cicoli, Sven Krippendorf, Christoph Mayrhofer, Fernando Quevedo, Roberto Valandro

Research output: Contribution to journalArticlepeer-review


In the context of type IIB string theory we combine moduli stabilisation and model building on branes at del Pezzo singularities in a fully consistent global compactification. By means of toric geometry, we classify all the Calabi-Yau manifolds with 3 < h1,1 < 6 which admit two identical del Pezzo singularities mapped into each other under the orientifold involution. This effective singularity hosts the visible sector containing the Standard Model while the Kähler moduli are stabilised via a combination of D-terms, perturbative and non-perturbative effects supported on hidden sectors. We present concrete models where the visible sector, containing the Standard Model, gauge and matter content, is built via fractional D3-branes at del Pezzo singularities and all the Kähler moduli are fixed providing an explicit realisation of both KKLT and LARGE volume scenarios, the latter with D-term uplifting to de Sitter minima. We perform the consistency checks for global embedding such as tadpole, K-theory charges and Freed-Witten anomaly cancellation. We briefly discuss phenomenological and cosmological implications of our models.

Original languageEnglish (US)
Article number19
JournalJournal of High Energy Physics
Issue number9
StatePublished - 2012


  • Strings and branes phenomenology

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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