Sensitivity and Discovery Potential of the nEXO Experiment

The nEXO experiment consists of a time projection chamber filled with 5000 kg of isotopically enriched liquid xenon to search for the neutrinoless double beta decay (0νββ) in ¹³⁶Xe. Progress in the detector design, paired with higher fidelity in its simulation and an advanced data analysis, based on the one used for the final results of EXO-200, produce a sensitivity prediction that exceeds the half-life of 10²⁸ years at the 90% confidence level. The use of custom electroformed copper is now incorporated into the design, leading to a substantial reduction in backgrounds from the intrinsic radioactivity of detector materials. Combining all these developments result in a credible sensitivity estimate that covers the parameter space associated with the inverted neutrino mass ordering, along with a significant portion of the parameter space for the normal ordering scenario, for almost all nuclear matrix elements. In this talk I summarize this work with emphasis on the calculations and results of the nEXO sensitivity to 0νββ exclusion and its discovery potential.