Present status of neutrinoless double beta decay searches

TL;DR

This paper reviews recent neutrinoless double beta decay experiments, highlighting their current sensitivities, challenges, and the need for specific key requirements to definitively confirm the decay.

Contribution

It provides a comprehensive summary of the latest experimental status and discusses the critical challenges and requirements for future successful detection of 0vbb decay.

Findings

No evidence for 0vbb decay so far

Current experiments have set half-life limits and sensitivities

Key requirements for unambiguous detection are discussed

Abstract

Several new generation experiments searching for neutrinoless double beta decay (0vbb) have become operational over the last five years. This report summarizes the present status of the experimental search and discusses peculiarities, challenges and reached half-life limits/sensitivities in these experiments. So far, no evidence for 0vbb has been found. Starting from the current situation, the paper addresses the question whether an experiment alone will be able to proof unambiguously 0vbb decay and which would be the key-requirements to succeed in this.