A two-component vector WIMP -- fermion FIMP dark matter model with an extended seesaw mechanism

Understand

We consider an extension of the Standard Model that explains the neutrino masses and has a rich dark matter phenomenology.

• The model has two dark matter candidates, a vector WIMP and a fermion FIMP, and the sum of their relic densities matches the total dark matter abundance.
• We extensively study the dark matter production mechanisms and its connection with the neutrino sector, together with various bounds from present and future experiments.
• The extra scalar field in the model may induce a first-order phase transition in the early Universe.