Electroweak Phase Transition and Gravitational Waves in an Extended Supersymmetric Model

Electroweak Baryogenesis needs a Strong First-Order Electroweak Phase Transition as a pre-requisite to explain the observed Baryon asymmetry of the Universe. A strong first-order electroweak phase transition, single or multi-step, can be accommodated easily in supersymmetric models with singlet extensions. Confining ourselves in the context of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) extended with a right-handed neutrino superfield, we investigate the dynamics of Electroweak Phase Transition, and the possibility of Electroweak Baryogenesis, consistent with the collider, neutrino, and flavour physics constraints. We also scrutinize the scopes of Gravitational Wave production and detection prospects in the upcoming space-based interferometer within our framework. Our findings demonstrate the merit of such less familiar yet complementary probes for Physics beyond the Standard Model.