Abstract
One of the fundamental rules of nature and a pillar in the foundation of quantum theory and thus of modern physics is represented by the Pauli Exclusion Principle. We know that this principle is extremely well fulfilled due to many observations. Numerous experiments were performed to search for tiny violation of this rule in various systems. The experiment VIP at the Gran Sasso underground laboratory is searching for possible small violations of the Pauli Exclusion Principle for electrons leading to forbidden X-ray transitions in copper atoms. VIP is aiming at a test of the Pauli Exclusion Principle for electrons with high accuracy, down to the level of 10−29 – 10−30, thus improving the previous limit by 3–4 orders of magnitude. The experimental method, results obtained so far and new developments within VIP2 (follow-up experiment at Gran Sasso, in preparation) to further increase the precision by 2 orders of magnitude will be presented.
Highlights
The Pauli Exclusion Principle (PEP) uncovered by Wolfgang Pauli in 1925 [1] is one of the corner stones of quantum physics and it is at the basis of the foundation of modern physics
PEP is tested for fresh electrons, i.e. elementary particles having no interaction with the studied system circumventing the Messiah-Greenberg super-selection rule[10]
Interesting are cases in which new fermions are used as test particles - in the case of VIP2 fresh electrons introduced by an electric current
Summary
J. Marton1, S. Bartalucci2, S. Bertolucci4, C. Berucci1,2, M. Bragadireanu2,3, M. Cargnelli1, C. Curceanu (Petrascu)2,3, S. Di Matteo5, J.-P. Egger6, C. Guaraldo2, M. Iliescu2, T. Ishiwatari1, M. Laubenstein7, E. Milotti8, D. Pietreanu2, K. Piscicchia2,9, T. Ponta2,3, A. Romero Vidal2, A. Scordo2, D.L. Sirghi2,3, F. Sirghi2,3, L. Sperandio2, O. Vazquez Doce2, E. Widmann1 and J. Zmeskal1
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