| Autor: |
L. Baudis, R. Biondi, A. Bismark, A. Clozza, C. Curceanu, M. Galloway, F. Napolitano, F. Piastra, K. Piscicchia, A. Porcelli, D. Ramírez García |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
European Physical Journal C: Particles and Fields, Vol 84, Iss 11, Pp 1-10 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1434-6052 |
| DOI: |
10.1140/epjc/s10052-024-13510-1 |
| Popis: |
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 $$\beta ^2/2 < 4.8 \cdot 10^{-29}$$ β 2 / 2 < 4.8 · 10 - 29 (90% CL) is set. This improves the previous constraint from a comparable measurement by more than one order of magnitude. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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