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无中微子双贝塔衰变与超出标准模型的新物理
Neutrinoless double-beta decay and new physics beyond the Standard Model
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摘要: 作为自然界中最罕见的过程之一，无中微子双贝塔衰变是寻找超出标准模型的重要手段。文章将介绍这一过程的理论和实验研究面临的重大挑战。对这个过程的精确计算依赖于原子核多体方法，而目前的多体方法的精度还有待提高。不同多体方法得到的结果之间存在一定的差异，这些差异定性上可以通过相关模型的缺陷来解释，定量上还缺乏有效的研究。通过有限的实验可观测量来约束衰变的底层机制是理论上的一个重要挑战，目前的可观测量主要是出射电子的性质和原子核的性质，相关的研究还比较匮乏。
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关键词:
- 轻子数破缺 /
- 原子核内罕见过程 /
- 超出标准模型的新物理 /
- 核多体方法
Abstract: As one of the rarest processes in nature, neutrinoless double-beta decay is the key in our search for new physics beyond the Standard Model, where we are facing big challenges, both theoretically and experimentally. The precise prediction for this process relies heavily on the nuclear many-body approaches which still lack necessary precision. Results from various methods differ; they can be explained qualitatively but require quantitative investigation. Another great challenge is to determine the underlying mechanisms with only limited observables—chiefly, the properties of emitted electrons and final nuclei—and research in this area is still inadequate. -
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