在LNGS利用Gator探测器搜寻泡利不相容原理的违反现象
Search for Pauli Exclusion Principle Violations with Gator at LNGS
AI总结：
本研究利用LNGS的低本底高纯锗探测器Gator，通过满足Messiah-Greenberg超选择定则的实验技术检验铅原子中违反泡利不相容原理的跃迁，未观测到违反现象，将相关概率上限约束提升一个数量级以上。
摘要：
泡利不相容原理（PEP）源自量子场论中的基本对称性，但其物理起源仍有待探明。针对微小PEP违反现象的高精度实验搜寻，能够以高灵敏度检验标准模型的关键假设。我们报告了利用Gator开展的一项专门测量，Gator是运行于格兰萨索国家实验室（Laboratori Nazionali del Gran Sasso）的低本底高纯度锗探测器，旨在检验铅原子中违反PEP的原子跃迁。该实验技术依赖于通过直流电向预先存在的电子系统中引入电子以形成新的对称态，满足Messiah-Greenberg超选择定则的条件。实验未观测到PEP违反现象，并设定了PEP违反概率的上限为$β^2/2 < 4.8 \times 10^{-29}$（90%置信水平）。这一结果将同类测量此前得到的约束提升了一个数量级以上。
英文摘要：
The Pauli Exclusion Principle (PEP) appears from fundamental symmetries in quantum field theories, but its physical origin is still to be understood. High-precision experimental searches for small PEP violations permit testing key assumptions of the Standard Model with high sensitivity. We report on a dedicated measurement with Gator, a low-background, high-purity germanium detector operated at the Laboratori Nazionali del Gran Sasso, aimed at testing PEP-violating atomic transitions in lead. The experimental technique, relying on forming a new symmetry state by introducing electrons into the pre-existing electron system through a direct current, satisfies the conditions of the Messiah-Greenberg superselection rule. No PEP violation has been observed, and an upper limit on the PEP violation probability of $β^2/2 < 4.8 \cdot 10^{-29}$ (90% CL) is set. This improves the previous constraint from a comparable measurement by more than one order of magnitude.
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