The Majorana Demonstrator experiment

The Majorana Demonstrator experiment searches for neutrinoless double-beta decay 0νββ in ⁷⁶Ge using p-type point contact high purity germanium detectors. The Demonstrator has successfully completed its data-taking for 0νββ in March 2021. The enriched detectors were then removed for the deployment in the 200 kg phase of the Large Enriched Germanium Detectors for Neutrinoless Double-beta Decay (LEGEND) experiment. Currently, Majorana is using only natural detectors to study the background and other physics searches including Tantalum-180m decay. The final results of the Majorana Demonstrator with an active enriched exposure of 64.5 kg-yr achieved an excellent energy resolution of 2.52 keV FWHM at the 2039 keV $Q_ββ}$ and set a lower half-life limit of yr (90% C.L.) for 0νββ in ⁷⁶Ge. The low backgrounds and excellent energy resolution favor the Demonstrator to search for additional physics beyond the Standard Model (BSM). In this talk, we will overview the Majorana Demonstrator experiment and present the final result. The talk will also discuss the BSM searches in Majorana.