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

作者：Cicoli Michele^*; Krippendorf Sven; Mayrhofer Christoph; Quevedo Fernando; Valandro Roberto

来源：The Journal of High Energy Physics, 2012, 2012(9): 019.

DOI：10.1007/JHEP09(2012)019

• Strings and branes phenomenology

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 %26lt; h(1,1) %26lt; 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 Kahler 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 Kahler 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.

• 出版日期2012-9