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D3/D7 branes at singularities: Constraints from global embedding and moduli stabilisation

By M. Cicoli, S. Krippendorf, C. Mayrhofer, F. Quevedo and R. Valandro

Abstract

In the framework of type IIB string compactifications on Calabi-Yau orientifolds we describe how to construct consistent global embeddings of models with fractional D3-branes and connected `flavour' D7-branes at del Pezzo singularities with moduli stabilisation. Our results are applied to build an explicit compact example with a left-right symmetric model at a dP_0 singularity which features three families of chiral matter and gauge coupling unification at the intermediate scale. We show how to stabilise the moduli obtaining a controlled de Sitter minimum and spontaneous supersymmetry breaking. We find an interesting non-trivial dynamical relation between the requirement of TeV-scale soft terms and the correct phenomenological values of the unified gauge coupling and unification scale

Topics: Strings and branes phenomenology, Nuclear and High Energy Physics
Year: 2013
DOI identifier: 10.1007/JHEP07(2013)150
OAI identifier: oai:arts.units.it:11368/2866586
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