Experimental search for the violation of Pauli Exclusion Principle

Abstract

The VIolation of Pauli exclusion principle -2 experiment, or VIP-2 experiment, at the Laboratori Nazionali del Gran Sasso searches for x-rays from copper atomic transition that are prohibited by the Pauli Exclusion Principle. Candidate direct violation events come from the transition of a $2p$ electron to the ground state that is already occupied by two electrons. From the first data taking campaign in 2016 of VIP-2 experiment, we determined a best upper limit of 3.4 $\times$ 10${}^{-29}$ for the probability that such a violation exists. Significant improvement in the control of the experimental systematics was also achieved, although not explicitly reflected in the improved upper limit. By introducing a simultaneous spectral fit of the signal and background data in the analysis, we succeeded in taking into account systematic errors that could not be evaluated previously in this type of measurements.

arXiv comment18 pages, 10 figures, 2 tables, accepted by EPJ C on 12th April 2018

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• $K$-series X-ray yield measurement of kaonic hydrogen atoms in a gaseous target
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Cited by in corpus (7)

• Experimental test of Non-Commutative Quantum Gravity by VIP-2 Lead
• Multiparticle states in braided lightlike $\kappa$-Minkowski noncommutative QFT
• Search for Pauli Exclusion Principle Violations with Gator at LNGS
• Novel Machine Learning and Differentiable Programming Techniques applied to the VIP-2 Underground Experiment
• Detector setup of the VIP2 Underground Experiment at LNGS
• New limits on the Pauli forbidden transitions in 12C nuclei obtained with the complete Borexino dataset
• VIP2 in LNGS - Testing the Pauli Exclusion Principle for electrons with high sensitivity