학술논문
Final results on $${}^\mathbf{82 }{\hbox {Se}}$$ 82Se double beta decay to the ground state of $${}^\mathbf{82 }{\hbox {Kr}}$$ 82Kr from the NEMO-3 experiment
Document Type
article
Author
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; C. Macolino; F. Mamedov; C. Marquet; F. Mauger; B. Morgan; J. Mott; I. Nemchenok; M. Nomachi; F. Nova; F. Nowacki; H. Ohsumi; R. B. Pahlka; C. Patrick; F. Perrot; F. Piquemal; P. Povinec; P. Přidal; Y. A. Ramachers; A. Remoto; J. L. Reyss; C. L. Riddle; E. Rukhadze; N. I. Rukhadze; R. Saakyan; R. Salazar; X. Sarazin; Yu. Shitov; L. Simard; F. Šimkovic; A. Smetana; K. Smolek; A. Smolnikov; S. Söldner-Rembold; B. Soulé; 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
Source
European Physical Journal C: Particles and Fields, Vol 78, Iss 10, Pp 1-15 (2018)
Subject
Language
English
ISSN
1434-6044
1434-6052
1434-6052
Abstract
Abstract Using data from the NEMO-3 experiment, we have measured the two-neutrino double beta decay ($$2\nu \beta \beta $$ 2νββ ) half-life of $$^{82}$$ 82 Se as $$T_{\smash {1/2}}^{2\nu } \!=\! \left[ 9.39 \pm 0.17\left( \text{ stat }\right) \pm 0.58\left( \text{ syst }\right) \right] \times 10^{19}$$ T1/22ν=9.39±0.17stat±0.58syst×1019 y under the single-state dominance hypothesis for this nuclear transition. The corresponding nuclear matrix element is $$\left| M^{2\nu }\right| = 0.0498 \pm 0.0016$$ M2ν=0.0498±0.0016 . In addition, a search for neutrinoless double beta decay ($$0\nu \beta \beta $$ 0νββ ) using 0.93 kg of $$^{82}$$ 82 Se observed for a total of 5.25 y has been conducted and no evidence for a signal has been found. The resulting half-life limit of $$T_{1/2}^{0\nu } > 2.5 \times 10^{23} \,\text{ y } \,(90\%\,\text{ C.L. })$$ T1/20ν>2.5×1023y(90%C.L.) for the light neutrino exchange mechanism leads to a constraint on the effective Majorana neutrino mass of $$\langle m_{\nu } \rangle < \left( 1.2{-}3.0\right) \,\text{ eV }$$ ⟨mν⟩