The Origin of Neutrino Masses and Physics Beyond the Standard Model

TL;DR

This paper reviews models explaining neutrino masses, including seesaw mechanisms within grand unified theories, and introduces a new one-loop neutrino mass generation mechanism, highlighting recent theoretical developments.

Contribution

It presents a new one-loop neutrino mass mechanism and the first realization of Type III seesaw in a renormalizable SU(5) framework.

Findings

Review of tree-level and one-loop neutrino mass models

Introduction of a novel one-loop neutrino mass mechanism

First implementation of Type III seesaw in Adjoint SU(5)

Abstract

We discuss the simplest models for the generation of neutrinos masses at tree level and one-loop level. The realization of the different seesaw mechanisms in the context of renormalizable SU(5) and SO(10) theories is reviewed. A new mechanism for the generation of neutrino masses at one-loop level is presented. We discuss the first realization of the Type III seesaw mechanism in the context of a renormalizable SU(5) theory, called "Adjoint SU(5)".