Moduli rolling to a natural MSSM with gravitino dark matter

TL;DR

This paper presents a model where gravitino dark matter is naturally realized within a five-dimensional supergravity framework, linking moduli stabilization, inflation, and supersymmetry breaking.

Contribution

It introduces a novel scenario connecting moduli dynamics, inflation, and gravitino dark matter in a concrete 5D supergravity model.

Findings

Gravitino relic abundance matches observed dark matter density.

Higgs boson mass is consistent with experimental data.

Model avoids severe fine-tuning issues.

Abstract

We propose the gravitino dark matter in the gravity mediated supersymmetry breaking scenario. The mass hierarchies between the gravitino and other superparticles can be achieved by the nontrivial K\"ahler metric of the supersymmetry breaking field. As a concrete model, we consider the five-dimensional supergravity model in which moduli are stabilized, and then one of the moduli induces the slow-roll inflation. It is found that the relic abundance of the gravitino and the Higgs boson mass reside in the allowed range without a severe fine-tuning.