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Cosmological and phenomenological studies of string theory


String theory is for the moment a unique candidate for a consistent unification of gravity with gauge interactions but it lacks experimental evidence. Given the multitude of possible ways of compactifying string theory from ten to four dimensions, it then becomes very difficult to find the compactification that will correspond in the low energy limit to the Standard Model.

One aim of the project is to make advances in understanding the way in which the Standard Model is possibly embedded as a low-energy limit in string theory by finding models that are closer to its properties. Our effort will concentrate in ameliorating the low energy models obtained by orientifold compactifications and a special attention will be devoted to the current and future accelerator and cosmological data and the constraints for model building that they can provide.

Secondly we intend to address cosmological issues (time dependent solutions, moduli stabilization) in the context of realistic models. To this end, compactifications of type II strings with various fluxes in the internal manifold and, in particular, the case of fluxes leading to branes intersecting at angles, recently investigated, will be studied further and included in the string model building program presented above, in addition to more traditional non-perturbative phenomena as gaugino condensation in a hidden sector. Models with internal fluxes are also convenient to study the issue of tadpole resummations in a quantitative fashion.

This project will allow the candid ate to gain complementary knowledge in closely related fields to string theory, like particle physics and cosmology. At the same time the proposed project can contribute to consolidate the position of the European string theory community as a reference point in the area of string phenomenology.

Call for proposal

See other projects for this call