Dark Walker in the Early Universe: A Strongly Coupled Sector Model

Abstract

We explore the phenomenology of the ``Dark Walker'' -- an $\text{SU}(3)$ 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.

arXiv comment7 pages, 4 figures; v2: references added; v3: model updated; v4: published version

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Cited by in corpus (1)

• Searching for Unparticles with the Cosmic Microwave Background