Radiative origin of neutrino masses

TL;DR

This paper reviews mechanisms for generating Majorana neutrino masses, focusing on one- and two-loop models and systematic classification schemes to understand their theoretical and experimental implications.

Contribution

It provides a systematic classification of one- and two-loop neutrino mass generation mechanisms, enhancing understanding of their structure and testability.

Findings

Classified one- and two-loop neutrino mass models

Highlighted potential for experimental testing of loop-induced mechanisms

Developed systematic schemes for neutrino mass generation classification

Abstract

Mechanisms for Majorana neutrino mass generation can be classified according to the level at which the Weinberg operator is generated. The different possibilities can be sorted in "canonical" tree level and loop-induced realizations, the latter being motivated by their potential experimental testability. Here we discuss the one- and two-loop cases, paying special attention to systematic classification schemes which aim at building a full picture of neutrino mass generation.