Neutrinoless double beta decay from lattice QCD

TL;DR

This paper discusses the role of lattice QCD calculations in understanding neutrinoless double beta decay, a process linked to Majorana neutrinos and beyond Standard Model physics, providing preliminary results relevant for experiments.

Contribution

It presents the first lattice QCD calculations of matrix elements relevant for neutrinoless double beta decay, aiding experimental interpretation.

Findings

Preliminary lattice QCD results for relevant matrix elements.

Enhanced understanding of nuclear processes in neutrinoless double beta decay.

Support for experimental searches through theoretical calculations.

Abstract

While the discovery of non-zero neutrino masses is one of the most important accomplishments by physicists in the past century, it is still unknown how and in what form these masses arise. Lepton number-violating neutrinoless double beta decay is a natural consequence of Majorana neutrinos and many BSM theories, and many experimental efforts are involved in the search for these processes. Understanding how neutrinoless double beta decay would manifest in nuclear environments is key for understanding any observed signals. In these proceedings we present an overview of a set of one- and two-body matrix elements relevant for experimental searches for neutrinoless double beta decay, describe the role of lattice QCD calculations, and present preliminary lattice QCD results.