A Model of Four Generation Fermions and Cold Dark Matter and Matter-Antimatter Asymmetry

TL;DR

This paper proposes a particle physics model extending the Standard Model with a TeV-scale $U(1)_{B-L}$ symmetry that includes a fourth fermion generation and a dark matter neutrino, addressing several fundamental puzzles.

Contribution

It introduces a practical extension with a fourth fermion generation and dark matter candidate, explaining flavor puzzles, dark matter, and matter-antimatter asymmetry.

Findings

Model accounts for fermion flavor puzzles

Explains cold dark matter and matter-antimatter asymmetry

Feasible for future experimental testing

Abstract

I suggest a practical particle model as an extension to the standard model. The model has a TeV scale $U(1)_{B-L}$ symmetry and it contains the fourth generation fermions with the TeV scale masses, in which including a cold dark matter neutrino. The model can completely account for the fermion flavor puzzles, the cold dark matter, and the matter-antimatter asymmetry through the leptogenesis. In particular, it is quite feasible and promising to test the model in future experiments.