Techni-dilaton as Dark Matter

TL;DR

This paper proposes a new dark matter candidate called the light decoupled techni-dilaton, arising from walking technicolor theories, which is weakly interacting and can account for dark matter in a specific mass range.

Contribution

It introduces the techni-dilaton as a novel dark matter candidate from conformal technicolor models and analyzes its cosmological and astrophysical viability.

Findings

Techni-dilaton is extremely weakly interacting.

Produced mainly through non-thermal mechanisms.

Mass range suitable for dark matter is approximately 0.01 eV to 500 eV.

Abstract

We propose a new dark matter candidate, {\it light decoupled techni-dilaton}, which arises from the almost scale-invariant/conformal (walking) technicolor. We investigate its characteristic nature and discuss several cosmological and astrophysical constraints. It turns out that techni-dilatons are extremely weakly interacting and produced dominantly by the non-thermal mechanism to be the main component of dark matter with mass range between around 0.01 eV and 500 eV for typical walking technicolor scenarios.