Antimatter as Macroscopic Dark Matter

TL;DR

This paper discusses antimatter macroscopic dark matter candidates, highlighting current observational constraints and identifying significant unexplored parameter space, especially for nuclear-dense objects.

Contribution

It provides a comprehensive overview of antimatter macro dark matter models and emphasizes the need for further exploration of unconstrained parameter regions.

Findings

Current constraints exclude some antimatter macro models

Large parameter space remains unexplored, especially for nuclear-dense antimatter objects

Potential for future detection methods to probe unconstrained regions

Abstract

Antimatter macroscopic dark matter (macros) refers to a generic class of antimatter dark matter candidates that interact with ordinary matter primarily through annihilation with large cross-sections. A combination of terrestrial, astrophysical, and cosmological observations constrain a portion of the anti-macro parameter space. However, a large region of the parameter space remains unconstrained, most notably for nuclear-dense objects.