Universal gravitational-wave signatures from heavy new physics in the electroweak sector

Understand

We calculate the gravitational-wave spectra produced by the electroweak phase transition with TeV-scale Beyond-Standard-Model physics in the early universe.

• Our study captures the effect of quantum and thermal fluctuations within a non-perturbative framework.
• We discover a universal relation between the mean bubble separation and the strength parameter of the phase transition, which holds for a wide range of new-physics contributions.
• The ramifications of this result are three-fold: First, they constrain the gravitational-wave spectra resulting from heavy (TeV-scale) new physics.