Bosonic dark matter in a coherent state driven by thermal fermions

TL;DR

This paper explores how scalar boson fields interacting with thermal fermions can generate coherent oscillations, potentially serving as dark matter, with analysis across different scenarios and limits.

Contribution

It introduces a mechanism for bosonic dark matter production via thermal effects from fermions, providing analytic insights into various interaction regimes.

Findings

Coherent oscillations can be generated over a wide parameter range.

Analytic solutions describe the mechanism in different asymptotic limits.

The process offers a viable dark matter candidate through thermal interactions.

Abstract

If there is a scalar boson field interacting dominantly with a quark or a lepton in the thermal background, its coherent oscillation can be generated through the thermal effect and becomes a good dark matter candidate in a wide range of the coupling and masses. We describe the general features of this mechanism and analyze how it works in various situations considering asymptotic limits where analytic solutions can be obtained.