Signatures of dark Higgs boson in light fermionic dark matter scenarios

Understand

Thermal dark matter scenarios based on light (sub-GeV) fermions typically require the presence of an extra dark sector containing both a massive dark photon along with a dark Higgs boson.

• The latter generates both the dark photon mass and an additional mass term for the dark sector fermions.
• This simple setup has both rich phenomenology and bright detection prospects at high-intensity accelerator experiments.
• We point out that in addition to the well studied pseudo-Dirac regime, this model can achieve the correct relic density in three different scenarios, and examine in details their properties and experimental prospects.