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Beyond the Standard Model physics is required to explain both dark matter andthe baryon asymmetry of the universe, the latter possibly generated during astrong first-order electroweak phase transition. While many proposed modelstackle these problems independently, it is interesting to inquire whether thesame model can explain both. In this context, we link state-of-the-artperturbative assessments of the phase transition thermodynamics with theextraction of the dark matter energy density. These techniques are applied to anext-to-minimal dark matter model containing an inert Majorana fermion that iscoupled to Standard Model leptons via a scalar mediator, where the mediatorinteracts directly with the Higgs boson. For dark matter masses 180 GeV $ <M_\chi <$ 300 GeV, we discern regions of the model parameter space thatreproduce the observed dark matter energy density and allow for a first-orderphase transition, while evading the most stringent collider constraints.

Strong electroweak phase transition in $t$-channel simplified dark matter models