WIMP and FIMP dark matter in the inert doublet plus singlet model

Understand

We consider multi-component dark matter in a model where one dark matter component is feebly interacting (FIMP) while the second is weakly interacting (WIMP).

• The model contains an inert scalar doublet and a complex scalar singlet and features a discrete $Z_4$ symmetry.
• We determine the parameter space that satisfies theoretical constraints, collider constraints, relic density as well as direct and indirect detection limits.
• We discuss the possibility to probe the model through collider and astrophysical searches.