Search for Pauli Exclusion Principle violations with Gator at LNGS

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS The European Physical Journal C Pub Date : 2024-11-02 DOI:10.1140/epjc/s10052-024-13510-1

L. Baudis, R. Biondi, A. Bismark, A. Clozza, C. Curceanu, M. Galloway, F. Napolitano, F. Piastra, K. Piscicchia, A. Porcelli, D. Ramírez García

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Abstract

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 \(\beta ^2/2 < 4.8 \cdot 10^{-29}\) (90% CL) is set. This improves the previous constraint from a comparable measurement by more than one order of magnitude.

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在 LNGS 使用 Gator 搜索违反保利排斥原理的情况

保利排斥原理（PEP）出现于量子场论的基本对称性中，但其物理起源仍有待了解。通过高精度实验搜索小的保利排斥原理违反情况，可以高灵敏度地测试标准模型的关键假设。我们报告了在大萨索国家实验室（Laboratori Nazionali del Gran Sasso）使用低背景、高纯度锗探测器 "盖特"（Gator）进行的专门测量，旨在测试铅中违反 PEP 的原子跃迁。该实验技术通过直流电将电子引入原有的电子系统，从而形成新的对称态，符合梅西亚-格林伯格超选择规则的条件。没有观测到PEP违反，PEP违反概率的上限被设定为\(\beta ^2/2 < 4.8 \cdot 10^{-29}\) (90% CL)。这比之前的可比测量约束提高了一个数量级以上。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.