Both MAJORANA DEMONSTRATOR and LEGEND projects attempt to seek the answer to the question of whether neutrinos are their own antiparticle by looking for a Standard-Model-forbidden decay called neutrinoless double-beta decay in the ⁷⁶Ge nucleus.  

If this decay were observed, neutrinos would be their own antiparticles and might shed light on how matter was created in the early universe.

The MAJORANA DEMONSTRATOR has completed its data collection at the Sanford Underground Research Facility in South Dakota.  

LEGEND is a successor experiment located at Laboratori Nazionali del Gran Sasso in Italy. The first phase, LEGEND-200, is operating, and the second phase, LEGEND-1000, which has about 5 times as many decaying ⁷⁶Ge nuclei, is under funding consideration.

The LBNL Neutrinos Program designed and built the best-in-class low-noise front-end electronics for MAJORANA DEMONSTRATOR and LEGEND-200.