Domain walls of N=2 supergravity in five dimensions from hypermultiplet moduli spaces

TL;DR

This paper constructs and analyzes domain wall solutions in five-dimensional N=2 supergravity coupled to hypermultiplets, revealing a rich family of models with multiple AdS backgrounds and interpolating domain walls.

Contribution

It introduces a new class of hypermultiplet moduli spaces based on inhomogeneous toric ESD manifolds and demonstrates the existence of supersymmetric domain walls connecting various AdS_5 vacua.

Findings

Existence of Randall-Sundrum type domain walls in the models.

Chains of domain walls interpolating between different AdS_5 backgrounds.

Construction of models with infinite smooth hypermultiplet moduli spaces.

Abstract

We study domain wall solutions in d=5, N=2 supergravity coupled to a single hypermultiplet whose moduli space is described by certain inhomogeneous, toric ESD manifolds constructed recently by Calderbank and Singer. Upon gauging a generic U(1) isometry of these spaces, we obtain an infinite family of models whose "superpotential" admits an arbitrary number of isolated critical points. By investigating the associated supersymmetric flows, we prove the existence of domain walls of Randall-Sundrum type for each member of our family, and find chains of domain walls interpolating between various AdS_5 backgrounds. Our models are described by a discrete infinity of smooth and complete one-hypermultiplet moduli spaces, which live on an open subset of the minimal resolution of certain cyclic quotient singularities. These spaces generalize the Pedersen metrics considered recently by Behrndt and Dall' Agata.