Cosmological Relaxation from Dark Fermion Production
High Energy Physics - Phenomenology
2020-03-18 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We consider the cosmological relaxation solution to the electroweak hierarchy problem using the fermion production as a dominant friction force. In our approach, neither super-Planckian field excursions nor a large number of e-folds arise, and scanning over thermal Higgs mass squared is avoided. The produced fermions from the relaxion source through the derivative coupling are SM-singlets, what we call dark fermions, and they can serve as the keV scale warm dark matter candidates.
Keywords
Cite
@article{arxiv.1909.07706,
title = {Cosmological Relaxation from Dark Fermion Production},
author = {Kenji Kadota and Ui Min and Minho Son and Fang Ye},
journal= {arXiv preprint arXiv:1909.07706},
year = {2020}
}
Comments
40 pages, 9 figures; small modifications in the appendix: comments on the static Universe limit added, brief discussion about the shutdown of the backraction added; version accepted for publication in JHEP