Dark Walker in the Early Universe: A Strongly Coupled Sector Model
High Energy Physics - Phenomenology
2025-12-09 v4 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We explore the phenomenology of the ``Dark Walker'' -- an theory with eight flavors of massless fundamental fermions in the dark sector. During inflation, its walking dynamics generate primordial non-Gaussianities through the exchange of unparticles, while accounting for the current dark matter relic abundance if we consider freeze-in of Dark Walker coupled to the Standard Model through the Higgs portal. This provides a simple yet predictive example linking strongly coupled inflationary dynamics to present-day dark matter.
Cite
@article{arxiv.2507.06454,
title = {Dark Walker in the Early Universe: A Strongly Coupled Sector Model},
author = {Chen Yang},
journal= {arXiv preprint arXiv:2507.06454},
year = {2025}
}
Comments
7 pages, 4 figures; v2: references added; v3: model updated; v4: published version