The Left-Right SU(3)(L)xSU(3)(R)xU(1)(X) Model with Light, keV and Heavy Neutrinos

TL;DR

This paper develops a comprehensive left-right symmetric model based on SU(3)_L x SU(3)_R x U(1)_X gauge symmetry, incorporating light, keV-scale, and heavy neutrinos to address neutrino oscillations, dark matter, and baryogenesis.

Contribution

It introduces a novel gauge symmetry framework that naturally includes multiple neutrino mass scales and explains several fundamental phenomena in particle physics and cosmology.

Findings

Model predicts three light active neutrinos.

Includes keV-scale neutrinos as warm dark matter candidates.

Features six heavy neutrinos around 10^11 GeV for leptogenesis.

Abstract

We construct a full left-right model for the electroweak interactions based on the $SU(3)_{L}\otimes SU(3)_{R}\otimes U(1)_{X}$ gauge symmetry. The fermion content of the model is such that anomaly cancellation restricts the number of families to be a multiple of three. One of the most important features of the model is the joint presence of three light active neutrinos, three additional neutrinos at keV mass scale, and six heavy ones with masses around\textbf{$10^{11}$} GeV. They form a well-motivated part of the spectrum in the sense they address challenging problems related to neutrino oscillation, warm dark matter, and baryogenesis through leptogenesis.