Moduli Stabilization in non-Supersymmetric Minkowski Vacua with Anomalous U(1) Symmetry

TL;DR

This paper explores how two moduli can be stabilized in Minkowski or de Sitter vacua within string-inspired supergravity models, highlighting natural mechanisms and resulting soft mass spectra, including dynamical supersymmetry breaking.

Contribution

It demonstrates a natural moduli stabilization mechanism in non-supersymmetric vacua with anomalous U(1) symmetry, applicable to type IIB and heterotic string models.

Findings

Stable Minkowski/de Sitter vacua with two moduli achieved.

Small mass difference between scalar and gaugino masses.

Dynamical supersymmetry breaking without constant superpotential.

Abstract

We study how two moduli can be stabilized in a Minkowski/de Sitter vacuum for a wide class of string-inspired Supergravity models with an effective Fayet-like Supersymmetry breaking. It is shown under which conditions this mechanism can be made natural and how it can give rise to an interesting spectrum of soft masses, with a relatively small mass difference between scalar and gaugino masses. In absence of a constant superpotential term, the above mechanism becomes completely natural and gives rise to a dynamical supersymmetry breaking mechanism. Some specific type IIB and heterotic string inspired models are considered in detail.