Gravitational Waves from the Phase Transition of a Non-linearly Realised Electroweak Gauge Symmetry

Understand

Within the Standard Model with non-linearly realised electroweak symmetry, the LHC Higgs boson may reside in a singlet representation of the gauge group.

• Several new interactions are then allowed, including anomalous Higgs self-couplings, which may drive the electroweak phase transition to be strongly first-order.
• In this paper we investigate the cosmological electroweak phase transition in a simplified model with an anomalous Higgs cubic self- coupling.
• We look at the feasibility of detecting gravitational waves produced during such a transition in the early universe by future space-based experiments.