Baryogenesis and Leptogenesis from Supercooled Confinement

Understand

We propose a framework of baryogenesis and leptogenesis that relies on a supercooled confining phase transition (PT) in the early universe.

• The baryon or lepton asymmetry is sourced by decays of hadrons of the strong dynamics after the PT, and it is enhanced compared to the non-confining case, which was the only one explored so far.
• This widens the energy range of the PT, where the observed baryon asymmetry can be reproduced, down to the electroweak scale.
• The framework then becomes testable with gravity waves (GW) at LISA and the Einstein Telescope.