Abstract
The status of the chiral tensor particles in the extended electroweak model, their experimental constraints, signatures and the possibilities for their detection at the new colliders are shortly reviewed. The cosmological effects of the additional particles are discussed. Namely, their characteristic interactions with the other components of the early Universe plasma and the corresponding cosmic times and temperatures are determined. The dynamical cosmological effect, namely the speeding of the Friedmann expansion due to the density increase caused by the chiral tensor particles and the additional Higgs doublet is discussed. The presence of the chiral tensor particles is allowed from cosmological considerations and welcomed by the particle physics phenomenology.
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