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 × 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.
@article{arxiv.1804.04446,
title = {Experimental search for the violation of Pauli Exclusion Principle},
author = {H. Shi and E. Milotti and S. Bartalucci and M. Bazzi and S. Bertolucci and A. M. Bragadireanu and M. Cargnelli and A. Clozza and L. De Paolis and S. Di Matteo and J. -P. Egger and H. Elnaggar and C. Guaraldo and M. Iliescu and M. Laubenstein and J. Marton and M. Miliucci and A. Pichler and D. Pietreanu and K. Piscicchia and A. Scordo and D. L. Sirghi and F. Sirghi and L. Sperandio and O. Vazquez Doce and E. Widmann and J. Zmeskal and C. Curceanu},
journal= {arXiv preprint arXiv:1804.04446},
year = {2018}
}
Comments
18 pages, 10 figures, 2 tables, accepted by EPJ C on 12th April 2018