Hybrid Dark Matter

TL;DR

This paper introduces a hybrid dark matter model combining thermal and non-thermal production mechanisms, providing analytical relic abundance calculations and exploring experimental constraints.

Contribution

It presents the first analytical relic abundance calculation for Higgs portal hybrid dark matter and investigates experimental constraints on this novel model.

Findings

Analytical relic abundance formula derived for hybrid dark matter.

Constraints identified from direct detection experiments.

Constraints identified from indirect detection experiments.

Abstract

Dark matter can be produced in the early universe via the freeze-in or freeze-out mechanisms. Both scenarios were investigated in references, but the production of dark matters via the combination of these two mechanisms are not addressed. In this paper we propose a hybrid dark matter model where dark matters have two components with one component produced thermally and the other one produced non-thermally. We present for the first time the analytical calculation for the relic abundance of the Higgs portal hybrid dark matter, then we investigate constraints on the parameter space of the model from dark matter direct and indirect detection experiments.