Does dark matter consist of baryons of new stable family quarks?

TL;DR

This paper explores the hypothesis that dark matter could be composed of baryons made from a hypothetical heavy fifth family of quarks and leptons, analyzing their properties and cosmological implications.

Contribution

It introduces the concept of a fifth family of particles as dark matter candidates and estimates their properties and cosmological behavior.

Findings

Heavy fifth family baryons could be viable dark matter candidates.

Constraints from experiments and cosmology limit the properties of these particles.

Cosmological evolution models support the stability of fifth family clusters.

Abstract

We investigate the possibility that the dark matter consists of clusters of the heavy family quarks and leptons with zero Yukawa couplings to the lower families. Such a family is predicted by the approach unifying spins and charges as the fifth family. We make a rough estimation of properties of baryons of this new family members and study possible limitations on the family properties due to the direct experimental and the cosmological evidences, studying the cosmological evolution of the fifth family clusters.