학술논문
Measurement of the double-β1501+150 decay of β1501+150Nd to the 0β1501+150 excited state of β1501+150Sm in NEMO-3
Document Type
Original Paper
Author
Aguerre, X.; Arnold, R.; Augier, C.; Barabash, A. S.; Basharina-Freshville, A.; Blondel, S.; Blot, S.; Bongrand, M.; Breier, R.; Brudanin, V.; Busto, J.; Bystryakov, A.; Caffrey, A. J.; Cerna, C.; Cesar, J. P.; Ceschia, M.; Chauveau, E.; Chopra, A.; Dawson, L.; Duchesneau, D.; Durand, D.; Evans, J. J.; Flack, R.; Franchini, P.; Garrido, X.; Girard-Carillo, C.; Guillon, B.; Guzowski, P.; Hoballah, M.; Hodák, R.; Hubert, P.; Hussain, M. H.; Jullian, S.; Klimenko, A.; Kochetov, O.; Konovalov, S. I.; Koňařík, F.; Křižák, T.; Lalanne, D.; Lang, K.; Lemière, Y.; Li, P.; Loaiza, P.; Lutter, G.; Macko, M.; Mamedov, F.; Marquet, C.; Mauger, F.; Minotti, A.; Morgan, B.; Nemchenok, I.; Nomachi, M.; Nowacki, F.; Ohsumi, H.; Oliviéro, G.; Palušová, V.; Patrick, C.; Perrot, F.; Petro, M.; Pin, A.; Piquemal, F.; Povinec, P.; Pratt, S.; Přidal, P.; Quinn, W. S.; Ramachers, Y. A.; Remoto, A.; Reyss, J. L.; Riddle, C. L.; Rukhadze, E.; Saakyan, R.; Salamatin, A.; Salazar, R.; Sarazin, X.; Sedgbeer, J.; Shitov, Yu.; Simard, L.; Šimkovic, F.; Smetana, A.; Smolnikov, A.; Söldner-Rembold, S.; Štekl, I.; Suhonen, J.; Szklarz, G.; Tedjditi, H.; Thomas, J.; Timkin, V.; Tretyak, V. I.; Tretyak, V. I.; Umatov, V. I.; Vanushin, I.; Vereshchaka, Y.; Vorobel, V.; Waters, D.; Xie, F.
Source
The European Physical Journal C: Particles and Fields. 83(12)
Subject
Language
English
ISSN
1434-6052
Abstract
The NEMO-3 results for the double-β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year decay of β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022yearNd to the 0β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year and 2β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year excited states of β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022yearSm are reported. The data recorded during 5.25 year with 36.6 g of the isotope β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022yearNd are used in the analysis. The signal of the β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year transition to the 0β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year excited state is detected with a statistical significance exceeding 5β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year. The half-life is measured to be β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year year, which is the most precise value that has been measured to date. 90% confidence-level limits are set for the other decay modes. For the β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year decay to the 2β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year level the limit is β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year. The limits on the β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year decay to the 0β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year and 2β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year levels of β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022yearSm are significantly improved to β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year and β1501+1+1501502νββ1+σT1/22νββ(01+)=1.11-0.14+0.19stat-0.15+0.17syst×10202νββ1+T1/22νββ(21+)>2.42×1020year0νββ1+1+150T1/20νββ(01+)>1.36×1022yearT1/20νββ(21+)>1.26×1022year.