On the Origin of Majorana Neutrino Masses

TL;DR

This paper reviews the theoretical origins of Majorana neutrino masses, discussing beyond Standard Model scenarios involving lepton number violation and highlighting experimental tests like sterile neutrino searches and neutrinoless double beta decay.

Contribution

It provides a comprehensive discussion of plausible BSM mechanisms for Majorana neutrino mass generation based on lepton number violation assumptions.

Findings

Neutrino oscillations and phenomenology are summarized.

BSM scenarios involving lepton number violation are analyzed.

Experimental tests like sterile neutrino searches are emphasized.

Abstract

In the introductory part we briefly consider basics of neutrino oscillations and convenient phenomenology of neutrino oscillations in vacuum. Main part of this report is dedicated to a discussion of a plausible BSM scenarios of neutrino mass generation, based on assumptions of massless left-handed SM neutrinos and violation of the total lepton number. It is stressed that search for light sterile neutrinos and neutrinoless double $\beta$-decay could provide a crucial tests of this scenarios.