Light dark matter through resonance scanning

We propose a new out-of-equilibrium production mechanism of light dark matter: resonance scanning. If the dark matter mass evolved in the early Universe, resonant production may have occurred for a wide range of light dark matter masses today. We show that the dark matter relic abundance may be produced through the Higgs portal, in a manner consistent with current experimental constraints.

Automated summary

This article proposes a new out-of-equilibrium production mechanism for light dark matter called resonance scanning. If the mass of dark matter evolved in the early Universe, resonant production could have occurred for a wide range of light dark matter masses today. The study shows that the relic abundance of dark matter can be produced through the Higgs portal, consistent with current experimental constraints.