Speaker
Description
The MAJORANA DEMONSTRATOR was a modular array of $^{76}$Ge-enriched detectors that searched for neutrinoless double beta decay of $^{76}$Ge. It started data taking in 2015 with 44.5 kg of detector mass and recently concluded its primary data taking period. It published its final result on neutrinoless double beta decay in 2023, setting the half-life limit for the interaction to be $> 8.3\times10^{25}$ years. Other physics results published by the collaboration include excited state decay of $^{76}$Ge → $^{76}$Se, decay of $^{180m}$Ta to its ground state, tests of violation of Pauli’s Exclusion Principle, of charge conservation through electron decay, and of the CSL model of wave function collapse. In this talk I’ll summarize these results including the the experimental set-up of the MAJORANA DEMONSTRATOR and its current status, along with on-going analyses of cosmogenically produced isotopes in $^{76}$Ge detectors and searches for BSM physics through spectral distortion of the $2\nu\beta\beta$ spectrum.
