Interfacing ACHILLES and GENIE for Improving Neutrino-Nucleus Interaction Simulations in ICARUS

Precise modeling of neutrino-nucleus interactions is essential for measuring neutrino properties, constraining uncertainties, and testing new theoretical models. This project enhances the accuracy of event generation for the ICARUS detector by interfacing the ACHILLES (A CHIcago Land Lepton Event Simulator) and GENIE (Generates Events for Neutrino Interaction Experiments). The theory-driven ACHILLES offers advanced neutrino-nucleon modeling and high-precision cross-section calculations through a flexible factorization. In contrast, GENIE emphasizes experimental realism through treatment of the beam flux and detector geometry. By integrating ACHILLES into GENIE's event generation pipeline, we simultaneously leverage theoretical precision and experimental realism. GENIE parses through the event record of ACHILLES, placing the physics of ACHILLES in the context of the ICARUS experiment. Validations of the interface confirm successful event transfer and proper placement of interaction within the detector geometry. This hybrid approach lays a foundation for future experiments such as DUNE, allowing for more precise comparisons between theory and data, probing physics beyond the Standard Model.