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.


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    <subfield code="a">&lt;p&gt;The VIP Collaboration is performing high precision tests of the Pauli&amp;nbsp;Exclusion Principle for electrons in the extremely low cosmic background&amp;nbsp;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&lt;span class="math-tex"&gt;\(_{\alpha}\)&lt;/span&gt;&amp;nbsp;PEP-forbidden atomic transitions when the K shell is already occupied by two electrons. VIP set an upper limit on&amp;nbsp;the PEP-violation probability &lt;span class="math-tex"&gt;\(\frac{1}{2} \beta^2 &amp;lt; 4.7 \times 10^{-29}\)&lt;/span&gt;. 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&amp;nbsp;data analysis, corresponding to the the first run of the VIP-2 data taking (2016&amp;ndash;2017), will be presented.&lt;/p&gt;</subfield>
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