Gravitational Wave Signatures from Domain Wall and Strong First-Order Phase Transitions in a Two Complex Scalar extension of the Standard Model

Avik Paul, Upala Mukhopadhyay, Debasish Majumdar

We consider a simple extension of Standard Model by adding two complex singlet scalars with a $\mathrm{U}\left(1\right)$ symmetry. A discrete $\mathcal{Z}_2 \times \mathcal{Z}^{\prime}…