English

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 SU(3)\text{SU}(3) 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.

Keywords

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