Universal Scotogenic Fermion Masses in Left-Right Gauge Model

TL;DR

This paper proposes a left-right gauge model with a dark sector that radiatively generates realistic fermion masses, including the top quark, while conserving baryon and lepton numbers and predicting observable Higgs anomalies.

Contribution

It introduces a novel dark sector mechanism that enables all standard-model fermions to acquire masses radiatively within a left-right gauge framework.

Findings

All fermions, including the top quark, can gain realistic masses radiatively.

The model automatically conserves baryon and lepton numbers.

Predicts observable anomalous Higgs couplings.

Abstract

In the conventional left-right gauge model, if the Higgs scalar sector consists only of an $SU(2)_L$ doublet and an $SU(2)_R$ doublet, fermion masses are zero at tree level. There have been many studies on how they would become massive. With the help of a dark sector with $U(1)_D$ gauge symmetry, it is shown how all standard-model fermions may acquire realistic masses radiatively, including that of the top quark. In this context, the particle content of the model also implies the automatic conservation of baryon number $B$ and lepton number $L$ as in the standard model. Observable anomalous Higgs couplings are predicted.