String instantons, fluxes and moduli stabilization

Details String instantons, fluxes and moduli stabilization String instantons, fluxes and moduli stabilization

2007-10-16

arxiv.org/abs/0710.3080v1

Nucl.Phys.B795:453-489,2008

Physics

High Energy Physics

High Energy Physics - Theory

1+49 pages

Scientific paper

10.1016/j.nuclphysb.2007.11.026

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.

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