String instantons, fluxes and moduli stabilization

P. G. Camara (1) , E. Dudas (1, 2) , T. Maillard (1) , G. Pradisi (3)

1 CPHT - Centre de Physique Théorique [Palaiseau]
2 LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]
3 Università degli Studi di Roma Tor Vergata [Roma] = University of Rome Tor Vergata

We analyze a class of dual pairs of heterotic and type I models based on freely-acting $\mathbb{Z}_2 \times \mathbb{Z}_2$ orbifolds in four dimensions. Using the adiabatic argument, it is possible to calculate non-perturbative contributions to the gauge coupling threshold corrections on the type I side by exploiting perturbative calculations on the heterotic side, without the drawbacks due to twisted moduli. The instanton effects can then be combined with closed-string fluxes to stabilize most of the moduli fields of the internal manifold, and also the dilaton, in a racetrack realization of the type I model.

Domaines: Physique des Hautes Energies - Théorie [hep-th]

P. G. Camara, E. Dudas, T. Maillard, G. Pradisi. String instantons, fluxes and moduli stabilization. 2007. ⟨hal-00179935⟩