NEMO 3 double beta decay experiment: Latest results

The double beta decay experiment NEMO 3 has been taking data since February 2003. The aim of this experiment is to search for neutrinoless decay and investigate two neutrino double beta decay in seven different enriched isotopes (100Mo, 82Se, 48Ca, 96Zr, 116Cd, 130Te and 150Nd). After analysis of the data corresponding to 693 days, no evidence for Ov ββ decay in 100Mo and 82Se was found. The half-life limits at 90% C.L. are 5.8 · 1023 y and 2.1 · 1023 y, respectively. Using ∼ 940 days of data, preliminary results were obtained for 48Ca, 96Zr and 150Nd. For two neutrino decay half-life values were measured, T1/2(48Ca) = [4.4+0.5-0.4(stat) ± 0.4(syst)] · 1019 y and T1/2(150Nd) = [9.2+0.25-0.22 (stat) ± 0.62(syst)] · 1019 y and T1/2(150 Nd) = [9.2+0.25-0.22(stat) ± 0.62(syst)] · 1018 y. Also for Ovββ decay the following limits at 90% C.L. were obtained, > 1.3 · 1022 y for 48Ca, > 8.6 · 1021 y for 96Zr and > 1.8 · 10 y for 150Nd.