High Scale Electroweak Phase Transition: Baryogenesis & Symmetry Non-Restoration
Abstract
We explore the possibility that the electroweak phase transition happens at a scale much higher than the electroweak scale today. In this context, high scale CP-violating sources for electroweak baryogenesis are not constrained by low-energy experiments. We propose a scenario of high-scale electroweak baryogenesis linked to flavour physics. This scenario allows for a period of enhanced Yukawa couplings during the evolution of the universe, which source time-dependent CP violation. The electroweak symmetry is never restored after the high-scale phase transition due to negative contributions to the Higgs thermal mass squared from a large number of additional electroweak-scale neutral scalars coupling to the Higgs. As a result, the washout of the baryon asymmetry is avoided.
Cite
@article{arxiv.1807.08770,
title = {High Scale Electroweak Phase Transition: Baryogenesis & Symmetry Non-Restoration},
author = {Iason Baldes and Geraldine Servant},
journal= {arXiv preprint arXiv:1807.08770},
year = {2018}
}
Comments
25 pages, 13 figures. v2: Published version (added/edited two sentences, fixed typo, no other changes)