Neutrinoless Double Beta Decay

TL;DR

This paper reviews how neutrinoless double beta decay can be used to explore new physics, including mechanisms involving light and heavy neutrinos, and discusses its implications for lepton number violation and baryogenesis.

Contribution

It provides a comprehensive overview of both long-range and short-range mechanisms of neutrinoless double beta decay and their connection to collider physics and baryogenesis.

Findings

Neutrinoless double beta decay can probe lepton number violation.

Different mechanisms, including light and heavy neutrino exchange, are analyzed.

Implications for collider experiments and baryogenesis are discussed.

Abstract

We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed. We also stress aspects of the connection to lepton number violation at colliders and the implications for baryogenesis.