Super-cool Dark Matter
High Energy Physics - Phenomenology
2018-09-10 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
In dimension-less theories of dynamical generation of the weak scale, the Universe can undergo a period of low-scale inflation during which all particles are massless and super-cool. This leads to a new mechanism of generation of the cosmological Dark Matter (DM) relic density: super-cooling can easily suppress the amount of DM to the desired level. This is achieved for TeV-scale DM, if super-cooling ends when quark condensates form at the QCD phase transition. Along this scenario, the baryon asymmetry can be generated either at the phase transition or through leptogenesis. We show that the above mechanism takes place in old and new dimension-less models.
Cite
@article{arxiv.1805.01473,
title = {Super-cool Dark Matter},
author = {Thomas Hambye and Alessandro Strumia and Daniele Teresi},
journal= {arXiv preprint arXiv:1805.01473},
year = {2018}
}
Comments
20 pages, 5 figures. Journal version