October 31, 2019 Journal article Open Access

TESTING THE PAULI EXCLUSION PRINCIPLE IN THE COSMIC SILENCE

Piscicchia, K.; Pichler, A.; Amirkhani, A.; Bartalucci, S.; Bertolucci, S.; Bazzi, M.; Bragadireanu, M.; Cargnelli, M.; Clozza, A.; Del Grande, R.; De Paolis, L.; Egger, J.; Fiorini, C.; Guaraldo, C.; Iliescu, M.; Laubenstein, M.; Marton, J.; Miliucci, M.; Milotti, E.; Pietreanu, D.; Scordo, A.; Shi, H.; Sirghi, D. L.; Sirghi, F.; Sperandio, L.; Vazquez Doce, O.; Zmeskal, J.; Curceanu, C.

The VIP Collaboration is performing high precision tests of the Pauli Exclusion Principle for electrons in the extremely low cosmic background environment of the Underground Gran Sasso Laboratories of INFN (Italy). The experimental technique consists in introducing a DC current in a copper conductor, searching for K\(_{\alpha}\) PEP-forbidden atomic transitions when the K shell is already occupied by two electrons. VIP set an upper limit on the PEP-violation probability \(\frac{1}{2} \beta^2 < 4.7 \times 10^{-29}\). The aim of the upgraded VIP-2 experiment is to improve this result at least by two orders of magnitude. The improved experimental setup and the results of a preliminary data analysis, corresponding to the the first run of the VIP-2 data taking (2016–2017), will be presented.