Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-07-19
Phys.Rev.Lett.95:182302,2005
Physics
High Energy Physics
High Energy Physics - Experiment
5 pages Submitted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.95.182302
The NEMO 3 detector, which has been operating in the Frejus underground laboratory since February 2003, is devoted to the search for neutrinoless double beta decay (bb0nu). Half-lives of the two neutrino double beta decays (bb2nu) 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 ~7kg of 100Mo and ~1 kg of 82Se. The corresponding lower limits for the half-lives are 4.6 x 10^23 years for 100Mo and 1.0 x10^23 years for 82Se (90% C.L.). Depending on the nuclear matrix elements calculation, limits for the effective Majorana neutrino mass are
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