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IEAP - Institute of Experimental and Applied Physics CTU - Czech Technical University in Prague
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Publication  > 'First results of the search for neutrinoless double beta decay with the NEMO 3 detector'
First results of the search for neutrinoless double beta decay with the NEMO 3 detector

Author
Arnold Roger IPHC Strasbourg
Augier Corinne LAL Orsay
Vála Ladislav, Ing.Ph.D. IEAP
Štekl Ivan, Doc. CSc. IEAP
Vorobel Vít, Ing. Ph.D. FMP Charles University
NEMO Collaboration  NEMO Collaboration

Year
2005

Scientific journal
Phys. Rev. Lett. 95 (2005) 182302


Abstract
The NEMO 3 detector, which has been operating in the Fréjus underground laboratory since February 2003, is devoted to the search for neutrinoless double-beta decay (ββ0ν). The half-lives of the two neutrino double-beta decay (ββ2ν) have been measured for 100Mo and 82Se. After 389 effective days of data collection from February 2003 until September 2004 (phase I), no evidence for neutrinoless double-beta decay was found from ∼7 kg of 100Mo and ∼1 kg of 82Se. The corresponding limits are T1/2(ββ0ν)>4.6×1023 yr for 100Mo and T1/2(ββ0ν)>1.0×1023 yr for 82Se (90% C.L.). Depending on the nuclear matrix element calculation, the limits for the effective Majorana neutrino mass are 〈mν〉 < 0.7 — 2.8 eV for 100Mo and 〈mν〉 < 1.7 — 4.9 eV for 82Se.
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Cite article as:
R. Arnold, C. Augier, L. Vála, I. Štekl, V. Vorobel, . NEMO Collaboration, "First results of the search for neutrinoless double beta decay with the NEMO 3 detector", Phys. Rev. Lett. 95 (2005) 182302 (2005)

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