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

TL;DR

This paper explores the hypothesis that dark matter may be composed of heavy baryons from a hypothetical fifth family of quarks and leptons predicted by a unifying theory, examining their properties and cosmological implications.

Contribution

It proposes a new dark matter candidate based on heavy family quarks and leptons with zero Yukawa couplings, analyzing their cosmological and experimental constraints.

Findings

Heavy family baryons could constitute dark matter.

Their properties are consistent with cosmological and experimental bounds.

The scenario provides a viable alternative to traditional dark matter models.

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 {\it approach unifying spin and charges} as the fifth family. We make a rough estimation of properties of baryons of this new family members, of their behaviour during the evolution of the universe and when scattering on the ordinary matter and study possible limitations on the family properties due to the cosmological and direct experimental evidences.