String instantons, fluxes and moduli stabilization

Abstract

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.

1+49 pages

References in corpus (6)

• Non-perturbative Yukawa Couplings from String Instantons
• Computation of D-brane instanton induced superpotential couplings - Majorana masses from string theory
• D-brane Instantons on the T^6/Z_3 orientifold
• Non-perturbative and Flux superpotentials for Type I strings on the Z_3 orbifold
• Open strings and their symmetry groups
• Instantons and Supersymmetry

Cited by in corpus (8)

• Power Towers of String Instantons for N=1 Vacua
• Algebras and non-geometric flux vacua
• Stringy Instantons and Yukawa Couplings in MSSM-like Orientifold Models
• (Unoriented) T-folds with few T's
• D-brane instanton effects in Type II orientifolds: local and global issues
• D-brane Instantons in 4D Supersymmetric String Vacua
• From Twists and Shifts to L-R asymmetric D-branes
• One-loop and D-instanton corrections to the effective action of open string models