Split Left-Right Symmetry and Scotogenic Quark and Lepton Masses

TL;DR

This paper introduces a split left-right symmetry model where only the first family of quarks and leptons transforms under $SU(2)_R$, with masses generated radiatively via a dark sector, leading to testable predictions.

Contribution

It proposes a novel split left-right symmetry framework with a minimal Higgs sector and radiative mass generation for lighter fermions, connecting dark sector interactions to observable phenomena.

Findings

Predicted $Z'$ and Higgs property deviations

Neutrino mixing and rare decay implications

Radiative mass generation for first family fermions

Abstract

A model of split left-right symmetry is proposed, where the first family of quarks and leptons transforms under $SU(2)_R$ but the heavier two families do not. The Higgs scalar sector consists only of an $SU(2)_L$ doublet and an $SU(2)_R$ doublet. The $u,d$ quarks and the electron, as well as the neutrinos, are massless at tree level, but become massive radiatively through their interactions with a simple dark sector. Verifiable consequences include $Z'$ and Higgs properties, neutrino mixing and rare decays, etc.