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26 April 2024

» arxiv » 2001.6388

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Search for the double-beta decay of 82Se to the excited states of 82Kr with NEMO-3
NEMO-3 collaboration R. Arnold ; C. Augier ; A.S. Barabash ; A. Basharina-Freshville ; S. Blondel ; S. Blot ; M. Bongrand ; D. Boursette ; R. Breier ; 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 ; C. Girard-Carillo ; H. Gómez ; B. Guillon ; P. Guzowski ; R. Hodak ; 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 ; A. Minotti ; B. Morgan ; J. Mott ; I. Nemchenok ; M. Nomachi ; F. Nova ; F. Nowacki ; H. Ohsumi ; G. Oliviéro ; R.B. Pahlka ; V. Palusova ; C. Patrick ; F. Perrot ; A. Pin ; F. Piquemal ; P. Povinec ; P. Přidal ; Y.A. Ramachers ; A. Remoto ; J.L. Reyss ; B. Richards ; C.L. Riddle ; E. Rukhadze ; R. Saakyan ; R. Salazar ; X. Sarazin ; J. Sedgbeer ; Yu. Shitov ; L. Simard ; F. Simkovic ; A. Smetana ; K. Smolek ; A. Smolnikov ; S. Söldner-Rembold ; B. Soulé ; I. Štekl ; J. Suhonen ; C.S. Sutton ; G. Szklarz ; H. Tedjditi ; J. Thomas ; V. Timkin ; S. Torre ; Vl.I. Tretyak ; V.I. Tretyak ; V.I. Umatov ; I. Vanushin ; C. Vilela ; V. Vorobela ; D. Waters ; F. Xie ; A. Žukauskas ;
Date:	17 Jan 2020
Abstract:	The double-beta decay of 82Se to the 0+1 excited state of 82Kr has been studied with the NEMO-3 detector using 0.93 kg of enriched 82Se measured for 4.75 y, corresponding to an exposure of 4.42 kg y. A dedicated analysis to reconstruct the gamma-rays has been performed to search for events in the 2e2g channel. No evidence of a 2nbb decay to the 0+1 state has been observed and a limit of T2n 1/2(82Se; 0+gs -> 0+1) > 1.3 1021 y at 90% CL has been set. Concerning the 0nbb decay to the 0+1 state, a limit for this decay has been obtained with T0n 1/2(82Se; 0+g s -> 0+1) > 2.3 1022 y at 90% CL, independently from the 2nbb decay process. These results are obtained for the first time with a tracko-calo detector, reconstructing every particle in the final state.
Source:	arXiv, 2001.6388
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