N=4 gauged supergravity and a IIB orientifold with fluxes

TL;DR

This paper explores a specific N=4 supergravity model derived from Type-IIB string theory with fluxes, analyzing its various supersymmetry-breaking phases and their moduli spaces, illustrating a no-scale supergravity structure.

Contribution

It provides a detailed analysis of a gauged N=4 supergravity model linked to Type-IIB flux compactifications, highlighting its phases and classical moduli spaces, and demonstrating its no-scale properties.

Findings

Identification of N=3,2,1,0 phases and their moduli spaces

Demonstration of the no-scale structure in this supergravity model

Connection of the supergravity theory to Type-IIB orientifold flux compactifications

Abstract

We analyze the properties of a spontaneously broken D=4, N=4 supergravity without cosmological constant, obtained by gauging translational isometries of its classical scalar manifold. This theory offers a suitable low energy description of the super-Higgs phases of certain Type-IIB orientifold compactifications with 3-form fluxes turned on. We study its N=3,2,1,0 phases and their classical moduli spaces and we show that this theory is an example of no-scale extended supergravity.