Electroweak phase transition in technicolor

TL;DR

This paper shows that certain walking technicolor models can have strong first order electroweak phase transitions, potentially enabling electroweak baryogenesis and producing detectable gravitational waves.

Contribution

It demonstrates that walking technicolor models can exhibit strong first order electroweak phase transitions and multiple electroweak symmetry breaking events.

Findings

Models can have first order phase transitions suitable for baryogenesis

Multiple electroweak transitions possible at the electroweak scale

Gravitational waves may be detectable from these transitions

Abstract

Several phenomenologically viable walking technicolor models have been proposed recently. I demonstrate that these models can have first order electroweak phase transitions, which are sufficiently strong for electroweak baryogenesis. Strong dynamics can also lead to several separate transitions at the electroweak scale, with the possibility of a temporary restoration and an extra breaking of the electroweak symmetry. First order phase transitions will produce gravitational waves, which may be detectable at future experiments.