ACTA

High Sensitivity Pauli Exclusion Principle Tests by the VIP Experiment: Status and Perspectives

K. Piscicchia^{a, b}, S. Bartalucci^b, S. Bertolucci^c, M. Bazzi^b, G. Borghi^d, M. Bragadireanu^{b, e}, C. Capoccia^b, M. Cargnelli^f, A. Clozza^b, R. Del Grande^{b, g}, L. De Paolis^b, C. Fiorini^h, C. Guaraldo^b, M. Iliescu^b, M. Laubensteinⁱ, J. Marton^f, M. Miliucci^b, E. Milotti^j, F. Napolitano^b, A. Porcelli^{b, f}, A. Scordo^b, H. Shi^f, D.L. Sirghi^{a, b, e}, F. Sirghi^{b, e}, F. Sgaramella^b, N. Zorzi^d, J. Zmeskal^f, C. Curceanu^{b, e}
^aCentro Ricerche Enrico Fermi-Museo Storico della Fisica e Centro Studi e Ricerche ``Enrico Fermi'', Via Panisperna 89a, I-00184 Roma, Italy
^bINFN, Laboratori Nazionali di Frascati, Via E. Fermi 54, I-00044 Frascati(RM), Italy
^cDipartimento di Fisica e Astronomia, University of Bologna and INFN-Sezione di Bologna, Via Irnerio 46, I-40126 Bologna, Italy
^dFondazione Bruno Kessler, Via Santa Croce 77, 38122 Trento, Italy
^eHoria Hulubei National Institute of Physics and Nuclear Engineering, Str. Atomistilor No. 407, P.O. Box MG-6 Bucharest-Magurele, Romania
^fStefan Meyer Institute for Subatomic Physics, Kegelgasse 27, 1030 Wien, Austria
^gPhysik Department E62, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
^hPolitecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria and INFN Sezione di Milano, I-20133 Milano, Italy
ⁱINFN, Laboratori Nazionali del Gran Sasso, Via G. Acitelli 22, I-67100 L'Aquila, Italy
^jDipartimento di Fisica, Universitá di Trieste and INFN-Sezione di Trieste, Via Valerio, 2, I-34127 Trieste, Italy

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The VIP Collaboration is performing high sensitivity tests of the Pauli exclusion principle for electrons in the extremely-low cosmic background environment of the Gran Sasso underground National Laboratory of INFN. In its open-systems configuration, the experiment checks the continuously renewed symmetry state of the conductive target, constantly supplied with electrons through a direct current. Consequently, VIP is operating the sole experiment challenging the spin-statistics connection in compliance with the Messiah-Greenberg superselection rule. The strongest bounds set by the VIP-2 experiment on the Pauli exclusion principle violation probability, by exploiting a copper target, will be reviewed. The future VIP-3 experiment will be presented, the aim of which is to map the Pauli exclusion principle violation probability as a function of the atomic number of the target under test.

DOI:10.12693/APhysPolA.142.361
topics: Pauli exclusion principle, X-rays spectroscopy, SDD detectors