Latest Results from the MAJORANA DEMONSTRATOR Neutrinoless Double-Beta Decay Search Experiment
ORAL
Abstract
The \textsc{Majorana Demonstrator} is searching for neutrinoless double-beta decay of $^{76}$Ge in an arrays of p-type, point-contact germanium detectors. It is comprised of 44 kg (30 kg enriched in $^{76}$Ge) germanium detectors. With its unprecedented energy resolution of 2.5 keV FWHM and the low background rate of 12 cts/(FWHM t yr) at the $^{76}$Ge Q-value of 2039 keV, the \textsc{Demonstrator} probes the neutrinoless double-beta decay, searching for new physics beyond the standard model. The \textsc{Demonstrator} has been operating since 2015 at the 4850' level of the Sanford Underground Research Facility. Our published results used 26 kg-yr exposure setting a half-life lower limit of 2.7$\times$10$^{25}$ yr (90\% C.L). The amount of collected exposure has doubled since the last release. In this talk, we present the status of the The \textsc{Majorana Demonstrator} and its latest results.
–
Authors
-
Inwook Kim
Los Alamos National Laboratory