Search for Neutrinoless Quadruple-β Decay of ^{150}Nd with the NEMO-3 Detector.

R Arnold,C Augier,A S Barabash,A Basharina-Freshville, S Blondel,S Blot,M Bongrand, D Boursette,V Brudanin,J Busto,A J Caffrey, S Calvez, M Cascella,C Cerna, J P Cesar,A Chapon,E Chauveau, A Chopra,L Dawson,D Duchesneau,D Durand,V Egorov,G Eurin,J J Evans,L Fajt, D Filosofov,R Flack,X Garrido,H Gómez, B Guillon, P Guzowski,R Hodák,A Huber,P Hubert,C Hugon, S Jullian,A Klimenko, O Kochetov,S I Konovalov,V Kovalenko,D Lalanne, K Lang, Y Lemière,T Le Noblet,Z Liptak, X R Liu,P Loaiza,G Lutter, M Macko, C Macolino, F Mamedov,C Marquet, F Mauger,B Morgan,J Mott,I Nemchenok, M Nomachi,F Nova,F Nowacki,H Ohsumi, C Patrick,R B Pahlka,F Perrot, F Piquemal,P Povinec, P Přidal,Y A Ramachers,A Remoto,J L Reyss, C L Riddle, E Rukhadze, R Saakyan,R Salazar, X Sarazin,Yu Shitov, L Simard,F Šimkovic,A Smetana, K Smolek,A Smolnikov,S Söldner-Rembold,B Soulé,D Štefánik,I Štekl,J Suhonen,C S Sutton,G Szklarz,J Thomas,V Timkin,S Torre,Vl I Tretyak,V I Tretyak,V I Umatov, I Vanushin,C Vilela,V Vorobel,D Waters, F Xie,A Žukauskas

PHYSICAL REVIEW LETTERS（2017）

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摘要

We report the results of a first experimental search for lepton number violation by four units in the neutrinoless quadruple-beta decay of Nd-150 using a total exposure of 0.19 kg yr recorded with the NEMO-3 detector at the Modane Underground Laboratory. We find no evidence of this decay and set lower limits on the half-life in the range T-1/2 > (1.1-3.2) x 10(21) yr at the 90% C.L., depending on the model used for the kinematic distributions of the emitted electrons.

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