Cosmogenic Background Signal Tagging Efficiency in the ICARUS Experiment Cosmic Ray Tagger

The ICARUS experiment is at the forefront of neutrino physics, poised to address observed neutrino oscillation anomalies as well as to provide further insights into recent measurements such as Neutrino-4, which hint at possible evidence for sterile neutrinos. Critical to these measurements is the ability to remove cosmogenic signals from data which can be mistaken for the electron neutrino appearance signal. The Cosmic Ray Tagger (CRT) will be used to 'tag' these incoming cosmogenic particles, and its efficiency is a crucial factor in understanding the level of this background. In this talk, I will discuss the techniques used to determine the overall CRT tagging efficiency including such factors as geometrical efficiency and the channel-by-channel efficiency of the signal readout electronics.