Strong First-Order Electroweak Phase Transition and Gravitational Waves in a ${\mathbb{Z}}_4$ Fermion-Scalar Dark Matter Model

J. P. Carvalho-Corrêa, J. P. Cunha-Melo, I. M. Pereira +2

We investigate whether a minimal ${\mathbb{Z}}_4$-symmetric fermion-scalar extension of the Standard Model can simultaneously realise viable dark matter, a strong electroweak phase t…