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Argonne National Laboratory has played a pivotal role in the ATLAS experiment at CERN’s Large Hadron Collider for over 30 years, contributing to the design and upgrades of the 8,000-ton detector. As part of preparations for the High-Luminosity LHC project, researchers are enhancing key components and adapting ATLAS-related code for exascale computing systems like the Aurora supercomputer, aiming to significantly boost data analysis capabilities. The ongoing work seeks to advance understanding in particle physics and explore phenomena beyond the Standard Model, including dark matter.