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Results of the NEMO3 experiment

Abstract : The purpose of the NEMO3 experiment is to detect neutrinoless double beta decay in order to determine the nature of neutrino and its absolute mass. We analysed the 389 effective days of data from the $\sim 7$ kg of $^{100}$Mo and $\sim 1$ kg of $^{82}$Se and obtained the following limits on the half-life for the \bb process: $T_{1/2}(\beta\beta0 \nu) > 4.6 \times 10^{23}$ years (Mo) and $T_{1/2}(\beta \beta 0 \nu) > 1.0 \times 10^{23}$ years (Se). The corresponding limits on the neutrino effective mass are $ <$ 0.7 - 2.8 eV (Mo) and $ >$ 1.7 - 4.9 eV (Se) at 90% Confident Level. We also performed a detailled analysis on the double beta decay of $^{100}$Mo into the excited states $0^+_1$, $2^+_1$ of $^{100}$Ru. The results are: $T_{1/2}(\beta \beta 2 \nu \to 0^+_1) = 5.7^{+1.3}_{-0.9}(stat)\pm 0.7 (syst) \times 10^{20}$ years, $T_{1/2}(\beta \beta 2 \nu \to 2^+_1) > 1.1 \times 10^{21}$ years, $T_{1/2}(\beta \beta 0 \nu \to 0^+_1) > 8.9 \times 10^{22}$ years, $T_{1/2}(\beta \beta 0 \nu \to 2^+_1) > 1.6 \times 10^{23}$ years.
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http://hal.in2p3.fr/in2p3-00105604
Contributor : Pascale Chambon <>
Submitted on : Wednesday, October 11, 2006 - 4:11:53 PM
Last modification on : Thursday, January 11, 2018 - 6:12:49 AM

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J.S. Ricol. Results of the NEMO3 experiment. 41st Rencontres de Moriond on Electroweak Interactions and Unified Theories, Mar 2006, La Thuile, Italy. pp.294-297. ⟨in2p3-00105604⟩

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