Multipartite Dark Matter

TL;DR

This paper explores the concept of multipartite dark matter, specifically focusing on the case of two coexisting particles, and examines how this scenario can relax constraints on particle physics models and impact detection experiments.

Contribution

It introduces the idea of multiple dark matter particles coexisting and analyzes how this affects constraints and predictions in particle physics and detection methods.

Findings

Two-component dark matter can relax constraints on supersymmetric models

The presence of a second dark matter particle alters detection signatures

Multipartite dark matter models provide new avenues for experimental verification

Abstract

Dark matter (comprising a quarter of the Universe) is usually assumed to be due to one and only one weakly interacting particle which is neutral and absolutely stable. We consider the possibility that there are several coexisting dark-matter particles, and explore in some detail the generic case where there are two. We discuss how the second dark-matter particle may relax the severe constraints on the parameter space of the Minimal Supersymmetric Standard Model, as well as other verifiable predictions in both direct and indirect search experiments.