Cosmogenic Backgrounds in the MAJORANA DEMONSTRATOR Search for Neutrinoless Double-Beta Decay in ⁷⁶Ge

Ultra-low background experiments such as the neutrinoless double-beta search in the MAJORANA DEMONSTRATOR and the future tonne-scale LEGEND experiment require a detailed understanding and minimization of all sources of background. An important method of minimizing muon-induced cosmogenic backgrounds is to build experiments in deep underground laboratories. A simulation campaign based on the GEANT4 and FLUKA codes provides an estimate of the cosmogenic background contributions to the MAJORANA DEMONSTRATOR, and is benchmarked by using data from the DEMONSTRATOR to validate the simulations. In this talk we discuss the details of the data analysis and simulation, the limitations of the campaign, and how this study benefits cosmogenic background estimation for the future LEGEND experiment.