Composite dark matter from a model with composite Higgs boson

TL;DR

This paper explores a composite dark matter model based on a minimal walking technicolor framework, focusing on techni-O-helium atoms as the primary dark matter component and addressing experimental detection discrepancies.

Contribution

It extends previous work by analyzing mixed dark matter scenarios, cosmological bounds on techniparticle masses, and potential explanations for direct detection experiment discrepancies.

Findings

Techni-O-helium dominates dark matter in the model.

Bound states of techniparticles are a minor dark matter component.

Proposed explanation for DAMA/NaI and DAMA/LIBRA experimental results.

Abstract

In a previous paper \cite{Khlopov:2007ic}, we showed how the minimal walking technicolor model (WTC) can provide a composite dark matter candidate, by forming bound states between a -2 electrically charged techniparticle and a $^4He^{++}$. We studied the properties of these \emph{techni-O-helium} $tOHe$ "atoms", which behave as warmer dark matter rather than cold. In this paper we extend our work on several different aspects. We study the possibility of a mixed scenario where both $tOHe$ and bound states between +2 and -2 electrically charged techniparticles coexist in the dark matter density. We argue that these newly proposed bound states solely made of techniparticles, although they behave as Weakly Interacting Massive Particles (WIMPs), due to their large elastic cross section with nuclei, can only account for a small percentage of the dark matter density. Therefore we conclude that within the minimal WTC, composite dark matter should be mostly composed of $tOHe$. Moreover in this paper, we put cosmological bounds in the masses of the techniparticles, if they compose the dark matter density. Finally we propose within this setup, a possible explanation of the discrepancy between the DAMA/NaI and DAMA/LIBRA findings and the negative results of CDMS and other direct dark matter searches that imply nuclear recoil measurement, which should accompany ionization.