nEXO: Searching for Neutrinoless Double-beta Decay with Liquid Xenon

Neutrinoless double beta decay is a second order weak process by which a nucleus simultaneously emits two electrons/positrons and no anti/neutrinos, and changes its atomic number by two. This process would violate lepton number conservation and show that neutrinos are their own antiparticle, a Majoranna particle. nEXO (new Enriched Xenon Observatory) is a planned experiment that will use a time projection chamber detector filled with 5 tons of liquid xenon to search for neutrinoless double beta decay of xenon 136. The experiment will use techniques developed for its predecessor, EXO-200, and scale up by an order of magnitude. nEXO is predicted to have a half-life sensitivity of 1.35 x 10²⁸ years in 10 years of data collection with a 90% confidence level.