Assessing a candidate IIA dual to metastable supersymmetry-breaking

TL;DR

This paper investigates linearized non-supersymmetric deformations of a specific IIA supergravity background to understand potential metastable supersymmetry-breaking states, revealing IR divergences that challenge their physical viability.

Contribution

It provides a detailed analysis of perturbations around the CGLP IIA solution, focusing on anti-D2 brane backreaction and identifying IR divergences in the candidate dual solutions.

Findings

IR divergences in flux densities and action

Candidate solutions are physically problematic due to divergences

Further investigation needed for string cosmology models

Abstract

We analyze the space of linearized non-supersymmetric deformations around a IIA solution found by Cvetic, Gibbons, Lu and Pope (CGLP) in hep-th/0101096. We impose boundary conditions aimed at singling out among those perturbations those describing the backreaction of anti-D2 branes on the CGLP background. The corresponding supergravity solution is a would-be dual to a metastable supersymmetry-breaking state. However, it turns out that this candidate bulk solution is inevitably riddled with IR divergences of its flux densities and action, whose physical meaning and implications for models of string cosmology call for further investigation.