Dilaton Stabilization in Effective Type I String Models

TL;DR

This paper demonstrates that in Type IIB orientifold models, the dilaton and T-moduli can be stabilized through a single gaugino condensation mechanism, with implications for supersymmetry breaking and phenomenology.

Contribution

It introduces a novel stabilization mechanism involving mixing of blowing-up modes with T-moduli and their role in gauge kinetic functions.

Findings

Successful stabilization of dilaton and T-moduli.

Supersymmetry breaking dominated by T-moduli auxiliary fields.

Emergence of phenomenologically interesting patterns.

Abstract

We show that the dilaton and T-moduli can be stabilized by a single gaugino condensation mechanism in the four-dimensional effective field theory derived from Type IIB orientifolds. A crucial role is played by the mixing of the blowing-up modes Mk with the T-moduli in the Kahler metric, and by the presence of the Mk in the gauge kinetic functions. Supersymmetry breaking in these models is dominated by the auxiliary fields of the T moduli, and phenomenologically interesting patterns can emerge.