Fourth Generations with an Inert Doublet Higgs

TL;DR

This paper extends the fourth generation model with multiple Higgs doublets and fermion singlets, explaining neutrino masses, dark matter candidates, and CP violation within a unified framework.

Contribution

It introduces a novel multi-Higgs doublet extension of the fourth generation model with radiative neutrino mass generation and stable dark matter candidates.

Findings

Neutrinos acquire mass radiatively at one loop

Heavy tree-level masses for fourth generation neutrinos

Multiple dark matter candidates stabilized by $Z_2$ symmetry

Abstract

We explore an extension of the fourth generation model with multi-Higgs doublets and three fermion singlets. The Standard Model neutrinos acquire mass radiatively at one loop level while the fourth generation neutrinos acquire a heavy tree-level mass. The model also contains several Dark Matter candidate whose stability is guaranteed by a $Z_2$ discrete symmetry. The possibility of CP violation in the scalar sector is also briefly discussed.