(Non-)Abelian Gauged Supergravities in Nine Dimensions

TL;DR

This paper constructs and analyzes five new massive deformations of nine-dimensional N=2 supergravity, exploring their origins, gauge groups, and solutions like domain walls and de Sitter spaces, with implications for string theory compactifications.

Contribution

It introduces five novel two-parameter massive deformations of nine-dimensional supergravity with specific gauge groups, derived via Scherk-Schwarz reduction, and studies their solutions and string theory relevance.

Findings

Identified five new massive supergravity deformations with distinct gauge groups.

Found half-supersymmetric domain wall solutions and non-supersymmetric de Sitter solutions.

Linked the constructed supergravities to low-energy limits of string theory.

Abstract

We construct five different two-parameter massive deformations of the unique nine-dimensional N=2 supergravity. All of these deformations have a higher-dimensional origin via Scherk-Schwarz reduction and correspond to gauged supergravities. The gauge groups we encounter are SO(2), SO(1,1)^+, R, R^+ and the two-dimensional non-Abelian Lie group A(1), which consists of scalings and translations in one dimension. We make a systematic search for half-supersymmetric domain walls and non-supersymmetric de Sitter space solutions. Furthermore, we discuss in which sense the supergravities we have constructed can be considered as low-energy limits of compactified superstring theory.