Anatomy of new SUSY breaking holographic RG flows

TL;DR

This paper constructs and analyzes new supergravity domain wall solutions that holographically model supersymmetry breaking in strongly coupled gauge theories, exploring their stability, spectrum, and potential phenomenological applications.

Contribution

It introduces a new class of holographic RG flow solutions in N=2 supergravity that break supersymmetry and analyzes their properties and implications.

Findings

Identified a three-dimensional parameter space of solutions interpolating between known cases.

Demonstrated stability of the dual theories by ruling out tachyonic resonances.

Analyzed the emergence and lifting of massless modes like the dilaton and R axion.

Abstract

We find and thoroughly study new supergravity domain wall solutions which are holographic realizations of supersymmetry breaking strongly coupled gauge theories. We set ourselves in an N=2 gauged supergravity with a minimal content in order to reproduce a dual N=1 effective SCFT which has a U(1)_R symmetry, a chiral operator whose components are responsible for triggering the RG flow, and an additional U(1)_F symmetry. We present a full three dimensional parameter space of solutions, which generically break supersymmetry. Some known solutions are recovered for specific sets of values of the parameters, with the new solutions interpolating between them. The generic backgrounds being singular, we provide a stability test of their dual theories by showing that there are no tachyonic resonances in the two point correlators. We compute the latter by holographic renormalization. We also carefully analyze the appearance of massless modes, such as the dilaton and the R axion, when the respective symmetries are spontaneously broken, and their lifting when the breaking is explicit. We further comment on the application of such class of backgrounds as archetypes of strongly coupled hidden sectors for gauge mediation of supersymmetry breaking. In particular, we show that it is possible to model in this way all types of hierarchies between the visible sector gaugino and sfermion masses.