Abstract Neutrino-less double-beta decay (0 ν β β ) is a hypothetical nuclear transition which violates lepton-number conservation and is therefore forbidden by the Standard Model of particle physics. Its observation would unambiguously demonstrate that neutrinos are Majorana particles and would provide unique information about the ordering and absolute scale of neutrino masses. This would have fundamental implications for neutrino physics and cosmology, opening a number of opportunities for many extended models and providing clues to some unanswered questions. The search for this decay is puzzling experimental physicists since about eighty years. After the introduction of the calorimetric approach in the 60s, another real breakthrough was represented by the proposal to use thermal (or low temperature) detectors, which dissolved any limitation in the choice of the detector materials. In this review, we summarize the status of 0 ν β β searches with thermal detectors and review the most recent results. We provide also some future perspectives in the framework of the international competition.

中文翻译：

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用热探测器寻找无中微子双β衰变

摘要 无中微子双β衰变（0 ν β β ）是一种假设的核跃迁，它违反了轻子数守恒，因此被粒子物理学标准模型所禁止。它的观察将明确地证明中微子是马约拉纳粒子，并将提供有关中微子质量排序和绝对尺度的独特信息。这将对中微子物理学和宇宙学产生根本性的影响，为许多扩展模型提供许多机会，并为一些未解决的问题提供线索。大约八十年以来，对这种衰变的探索一直困扰着实验物理学家。在 60 年代引入量热法之后，另一个真正的突破是使用热（或低温）探测器的提议，这消除了在选择探测器材料方面的任何限制。在这篇评论中，我们总结了使用热探测器进行 0 ν β β 搜索的状态并回顾了最新的结果。我们还在国际竞争的框架内提供了一些未来的观点。