Searches for the Violation of Pauli Exclusion Principle at LNGS in VIP(-2) experiment
H Shi, S. Bartalucci, S. Bertolucci, C. Berucci, A. M. Bragadireanu,, M. Cargnelli, A. Clozza, C. Curceanu, L. De Paolis, S. Di Matteo, A., d'Uffizi, J.-P. Egger, C. Guaraldo, M. Iliescu, T. Ishiwatari, J. Marton, M., Laubenstein, E. Milotti, D. Pietreanu, K. Piscicchia
TL;DR
The VIP-2 experiment at LNGS searches for violations of the Pauli Exclusion Principle by detecting forbidden X-ray transitions in copper atoms, aiming to improve sensitivity by two orders of magnitude over previous limits.
Contribution
This work reports on the upgraded VIP-2 experiment, enhancing detection precision to set more stringent limits on PEP violation probabilities.
Findings
Current limit on PEP violation probability is 4.7×10⁻²⁹.
VIP-2 aims to improve sensitivity by two orders of magnitude.
No violation detected within current experimental sensitivity.
Abstract
The VIP (Violation of Pauli exclusion principle) experiment and its follow-up experiment VIP-2 at the Laboratori Nazionali del Gran Sasso (LNGS) search for X-rays from Cu atomic states that are prohibited by the Pauli Exclusion Principle (PEP). The candidate events, if they exist, will originate from the transition of a orbit electron to the ground state which is already occupied by two electrons. The present limit on the probability for PEP violation for electron is 4.7 set by the VIP experiment. With upgraded detectors for high precision X-ray spectroscopy, the VIP-2 experiment will improve the sensitivity by two orders of magnitude.
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