Gravitational waves from supercooled phase transitions: dimensional transmutation meets dimensional reduction

Understand

Models with radiative symmetry breaking typically feature strongly supercooled first-order phase transitions, which result in an observable stochastic gravitational wave background.

• In this work, we analyse the role of higher order thermal corrections for these transitions, applying high-temperature dimensional reduction to a theory with dimensional transmutation.
• In particular, we study to what extent high-temperature effective field theories (3D EFT) can be used.
• We find that despite significant supercooling down from the critical temperature, the high-temperature expansion for the bubble nucleation rate can be applied using the 3D EFT framework, and we point out challenges in the EFT description.