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We propose an extension to the standard model where three exotic fermion5-plets and one scalar 6-plet are added to the particle content. By demandingthat all interactions are renormalizable and standard model gauge invariant, weshow that the lightest exotic particle in this model can be a dark mattercandidate as long as the new 6-plet scalar does not develop a nonzero vacuumexpectation value. Furthermore, light neutrino masses are generated radiativelyat one-loop while the baryon asymmetry is produced by the CP-violating decaysof the second lightest exotic particle. We have demonstrated using concreteexamples that there is a parameter space where a consistent solution to theproblems of baryon asymmetry, dark matter and neutrino masses can be obtained.

Exotic fermion multiplets as a solution to baryon asymmetry, dark matter and neutrino masses