Search for neutrinoless double beta decay

TL;DR

This paper reviews current and future experimental efforts to detect neutrinoless double beta decay, discussing technological challenges, recent results, and potential synergies with dark matter searches.

Contribution

It provides a comprehensive overview of experimental techniques, recent findings, and future challenges in the search for neutrinoless double beta decay, including technological innovations and interdisciplinary strategies.

Findings

Current experiments set stringent limits on effective Majorana mass.

Next-generation experiments face significant technological challenges.

Potential synergy with dark matter searches could enhance discovery prospects.

Abstract

We review current experimental efforts to search for neutrinoless double beta decay (0$\nu\beta\beta$). A description of the selected leading experiments is given and the strongest recent results are compared in terms of achieved background indexes and limits on effective Majorana mass. A combined limit is also shown. The second part of the review covers next generation experiments, highlighting the challenges and new technologies that may be necessary to achieve a justifiable discovery potential. A potential synergy with direct dark matter searches, which could be an especially prudent strategy in case the axial vector coupling constant is quenched in 0$\nu\beta\beta$ decay, is emphasized.