VIP-2 at LNGS: An experiment on the validity of the Pauli Exclusion Principle for electrons

5th Symposium on Prospects in the Physics of Discrete Symmetries

Marton, J.^1 ; Bartalucci, S.^2 ; Bassi, A.^3 ; Bazzi, M.^2 ; Bertolucci, S.^4 ; Berucci, C.^1,2 ; Bragadireanu, M.^2,3 ; Cargnelli, M.^1 ; Clozza, A.^2 ; Curceanu, C.^2,3,9 ; De Paolis, L.^2 ; Di Matteo, S.^6 ; Donadi, S.^4 ; Egger, J.-P.^7 ; Guaraldo, C.^2 ; Iliescu, M.^2 ; Laubenstein, M.^8 ; Milotti, E.^4 ; Pichler, A.^1 ; Pietreanu, D.^2,3 ; Piscicchia, K.^2,9 ; Scordo, A.^2 ; Shi, H.^2 ; Sirghi, D.^2,3 ; Sirghi, F.^2,3 ; Sperandio, L.^2 ; Vazquez-Doce, O.^5 ; Widmann, E.^1 ; Zmeskal, J.^1

Stefan Meyer Institute for Subatomic Physics, Boltzmanngasse 3, Vienna

1090, Austria^1

INFN, Laboratori Nazionali di Frascati, CP 13, Via E. Fermi 40, Frascati (Roma)

I-00044, Italy^2

Horia HulubeiNational Institute of Physics and Nuclear Engineering, Str. Atomistilor no. 407, Bucharest-Magurele, Romania^3

Dipartimento di Fisica, Universit'a di Trieste, INFN Sezione di Trieste, Via Valerio, 2, Trieste

I-34127, Italy^4

Excellence Cluster Universe, Technische Universitat Munchen, Garching, Germany^5

Institut de Physique, UMR CNRS-UR1 6251, Universite de Rennes1, Rennes

F-35042, France^6

Institut de Physique, Universite de Neuchatel, 1 rue A.-L. Breguet, Neuchatel

CH-2000, Switzerland^7

INFN, Laboratori Nazionali Del Gran Sasso, S.S. 17/bis, Assergi (AQ)

I-67010, Italy^8

Museo Storico della Fisica, Centro Studi e Ricerche Enrico Fermi, Roma, Italy^9

关键词: Circulating current;    Copper atoms;    Forbidden transitions;    High-precision;    Pauli exclusion principle;    Superselection;    Underground laboratory;    X ray transitions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/873/1/012018/pdf
DOI  :  10.1088/1742-6596/873/1/012018

来源: IOP

【 摘 要 】

We are experimentally investigating possible violations of standard quantum mechanics predictions in the Gran Sasso underground laboratory in Italy. We test with high precision the Pauli Exclusion Principle and the collapse of the wave function (collapse models). We present our method of searching for possible small violations of the Pauli Exclusion Principle (PEP) for electrons, through the search for "anomalous" X-ray transitions in copper atoms. These transitions are produced by "new" electrons (brought inside the copper bar by circulating current) which can have the possibility to undergo Pauli-forbidden transition to the 1s level already occupied by two electrons. We describe the VIP2 (VIolation of the Pauli Exclusion Principle) experimental data taking at the Gran Sasso underground laboratories. The goal of VIP2 is to test the PEP for electrons in agreement with the Messiah-Greenberg superselection rule with unprecedented accuracy, down to a limit in the probability that PEP is violated at the level of 10-31. We show preliminary experimental results and discuss implications of a possible violation.