Gravity-mediated (or Composite) Dark Matter

TL;DR

This paper proposes a novel dark matter model where gravitational mediators from extra dimensions determine dark matter interactions and relic abundance, linking higher-dimensional theories with composite Higgs models.

Contribution

It introduces a gravity-mediated dark matter scenario within warped extra dimensions and provides a dual four-dimensional composite Higgs framework.

Findings

Consistent dark matter relic abundance from gravitational mediators.

Constraints derived for models with warped extra dimensions.

Equivalence established between higher-dimensional and composite Higgs descriptions.

Abstract

Dark matter could have an electroweak origin, yet communicate with the visible sector exclusively through gravitational interactions. In a set-up addressing the hierarchy problem, we propose a new dark matter scenario where gravitational mediators, arising from the compactification of extra-dimensions, are responsible for dark matter interactions and its relic abundance in the Universe. We write an explicit example of this mechanism in warped extra-dimensions and work out its constraints. We also develop a dual picture of the model, based on a four-dimensional scenario with partial compositeness. We show that Gravity-mediated Dark Matter is equivalent to a mechanism of generating viable dark matter scenarios in a strongly-coupled, near-conformal theory, such as in composite Higgs models.