利用正电子确定无中微子弱衰变的机制
Pinpointing the Mechanism of Neutrinoless Weak Decays with Positrons
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中文总结 AI 辅助
本研究探讨正电子与电子模式探测器在无中微子双β衰变搜寻中的互补性，通过半衰期比值区分长程相互作用以识别纯右手轻子流，为无中微子弱衰变机制研究提供新方法。
中文摘要 AI 辅助
无中微子双β衰变是实验室探测中微子质量马约拉纳贡献的旗舰手段。然而，除了标准质量机制外，其他更高维度的轻子数破坏相互作用也可能参与该过程，甚至占据主导地位。相应的发射正电子的无中微子模式，如电子俘获或双正电子发射，长期以来因固有衰变率较小而被认为超出实验探测范围。最近，拟议的NuDoubt++实验所采用的创新探测器技术正在改变这一现状。本研究探讨了正电子模式与电子模式探测器在新物理搜寻中的互补性，假设观测到无中微子双β衰变，预测了正电子模式的预期发现半衰期，并利用半衰期比值（尤其是双β衰变与电子俘获模式间的比值）证明了如何区分潜在的长程相互作用，特别是识别纯右手轻子流。
英文摘要
Neutrinoless double beta decay is the flagship laboratory probe of a Majorana contribution to the neutrino mass. However, besides the standard mass mechanism other higher- dimensional lepton number-violating interactions can enter, or even dominate, this process. The corresponding positron-emitting neutrinoless modes, such as electron capture or double-positron emission, have long been considered out of reach experimentally, due to their naturally smaller rates. Recently, innovative detector technologies as used in the proposed NuDoubt++ experiment are changing the game. In this work, we explore how a positron- and electron-mode detector can be complementary in the search for new physics. Assuming an observation of neutrinoless double beta decay, we predict the expected discovery half-life for the positron-modes. Using half-life ratios, especially between the double beta and electron capture modes, we demonstrate how underlying long-range interactions can be distinguished, in particular to identify a purely right-handed leptonic current.
