Dark matter in the hidden gauge theory

TL;DR

This paper explores a hidden gauge theory framework for dark matter, examining its stability, cosmological evolution, and potential experimental tests, proposing mini-inflation scenarios linked to the Higgs sector to match observed dark matter and baryon densities.

Contribution

It introduces a novel scenario where mini-inflation driven by the Higgs sector addresses dark matter density and baryon asymmetry in a hidden gauge theory context.

Findings

Dark matter stability constrains its mass and unification scale.

Mini-inflation from the Higgs sector can reconcile dark matter density with observations.

Additional mini-inflation is needed for heavy hidden gauge particles before leptogenesis.

Abstract

The cosmological scenario of the dark matter generated in the hidden gauge theory based on the grand unification is discussed. It is found that the stability of the dark matter halo of our Galaxy and the cosmic ray observation constrain, respectively, the dark matter mass and the unification scale between the standard model and the hidden gauge theory sectors. To obtain a phenomenologically consistent thermal evolution, the entropy of the standard model sector needs to be increased. We therefore propose a scenario where the mini-inflation is induced from the potential coupled to the Standard model sector, in particular the Higgs sector. This scenario makes consistent the current dark matter density as well as the baryon-to-photon ratio for the case of pion dark matter. For the glueball or heavy pion of hidden gauge theory, an additional mini-inflation in the standard model sector before the leptogenesis is required. We also propose the possibility to confirm this scenario by known prospective experimental approaches.