Application of photon detectors in the VIP2 experiment to test the Pauli Exclusion Principle

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Pichler, A.^1 ; Bartalucci, S.^2 ; Bazzi, M.^2 ; Bertolucci, S.^3 ; Berucci, C.^1,2 ; Bragadireanu, M.^2,4 ; Cargnelli, M.^1 ; Clozza, A.^2 ; Curceanu, C.^2,4,10 ; De Paolis, L.^2 ; Di Matteo, S.^5 ; D'Ufflzi, A.^2 ; Egger, J.-P.^6 ; Guaraldo, C.^2 ; Iliescu, M.^2 ; Ishiwatari, T.^1 ; Laubenstein, M.^7 ; Marton, J.^1 ; Milotti, E.^8 ; Pietreanu, D.^2,4 ; Piscicchia, K.^2,10 ; Ponta, T.^2 ; Sbardella, E.^2 ; Scordo, A.^2 ; Shi, H.^2 ; Sirghi, D.^4 ; Sirghi, F.^2,4 ; Sperandio, L.^2 ; Vazquez-Doce, O.^9 ; Widmann, E.^1 ; Zmeskal, J.^1

Stefan Meyer Institute for Subatomic Physics, Boltzmanngasse 3, Vienna

1090, Austria^1

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

I-00044, Italy^2

CERN, Geneva 23

CH-1211, Switzerland^3

IFIN-HH, Institutul National Pentru Fizica Si Inginerie Nucleara Horia Hulubbei, Reactorului 30, Magurele, Romania^4

Institut de Physique, UMR CNRS-UR1 6251, Université de Rennes, Rennes

F-35042, France^5

Institut de Physique, Université de Neuchâtel, 1 rue A.-L. Breguet, Neuchâtel

CH-2000, Switzerland^6

INFN, Laboratori Nazionali Del Gran Sasso, Assergi (AQ)

I-67010, Italy^7

Dipartimento di Fisica, Università di Trieste, INFN-Sezione di Trieste, Via Valerio, 2, Trieste

I-34127, Italy^8

Excellence Cluster Universe, Technische Universität München, Boltzmannstrasse 2, Garching

D-85748, Germany

(10) Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Piazza del Viminale 1, Roma

03083, Italy^9

关键词: Active shielding;    Orders of magnitude;    Pauli exclusion principle;    Photon detector;    Plastic scintillator;    Silicon Drift Detector;    Silicon photomultiplier;    Underground laboratory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/5/052030/pdf
DOI  :  10.1088/1742-6596/718/5/052030

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The Pauli Exclusion Principle (PEP) was introduced by the austrian physicist Wolfgang Pauli in 1925. Since then, several experiments have checked its validity. From 2006 until 2010, the VIP (Violation of the Pauli Principle) experiment took data at the LNGS underground laboratory to test the PEP. This experiment looked for electronic 2p to Is transitions in copper, where 2 electrons are in the Is state before the transition happens. These transitions violate the PEP. The lack of detection of X-ray photons coming from these transitions resulted in a preliminary upper limit for the violation of the PEP of 4.7 × 10-29. Currently, the successor experiment VIP2 is under preparation. The main improvements are, on one side, the use of Silicon Drift Detectors (SDDs) as X-ray photon detectors. On the other side an active shielding is implemented, which consists of plastic scintillator bars read by Silicon Photomultipliers (SiPMs). The employment of these detectors will improve the upper limit for the violation of the PEP by around 2 orders of magnitude.