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 (${}^{100}$Mo,${}^{82}$Se, ${}^{48}$Ca, ${}^{96}$Zr, ${}^{116}$Cd, ${}^{130}$Te and ${}^{150}$Nd). After analysis of the data corresponding to 693 days, no evidence for $0\nu \beta \beta$ decay in ${}^{100}$Mo and ${}^{82}$Se was found. The half-life limits at 90% C.L. are $5.8\cdot {10}^{23}$ y and $2.1\cdot {10}^{23}$ y, respectively. Using $\sim$ 940 days of data, preliminary results were obtained for ${}^{48}$Ca, ${}^{96}$Zr and ${}^{150}$Nd. For two neutrino decay half-life values were measured, $T_{1/2}(^{48}{\rm Ca}) = [4.4^{+0.5}{-0.4}(stat) \pm 0.4(syst)] \cdot 10^{19}$y,$T{1/2}(^{96}{\rm Zr}) = [2.3 \pm 0.2(stat) \pm 0.3(syst)] \cdot 10^{19}$yand$T_{1/2}(^{150}{\rm Nd}) = [9.2^{+0.25}_{-0.22}(stat) \pm 0.62(syst)] \cdot 10^{18}$y\mathrm{.}Alsofor$0\nu\beta\beta$decaythefollowinglimitsat90$> 1.3 \cdot 10^{22}$yfor$^{48}$Ca,$> 8.6 \cdot 10^{21}$yfor$^{96}$Zr and > 1.8 \cdot 10^{22}$yfor$^{150}$Nd.