Charge Current single charged pion cross-section measurement in ICARUS

The ICARUS detector, serving as the Far Detector for the Short-Baseline Neutrino (SBN) program at Fermilab, has been successfully collecting physics data since June 2022. Due to it's positioning, ICARUS is exposed to both the on-axis Booster Neutrino Beam (BNB), shared among SBN detectors, and an off-axis neutrino flux from the NuMI beam at approximately 6° angle. This off-axis configuration, combined with contributions from both pion and kaon decays to neutrino fluxes, enables ICARUS to detect neutrino interactions over range of several GeV in energy.

These interactions offer a unique opportunity to measure neutrino cross-sections on an argon target within an energy region that overlaps both the SBN oscillation search and a significant portion of the DUNE experiment’s spectrum. In this talk, I will present an event selection for measuring the cross-section of charged-current events with single pion in the final state using NuMI beam. This topology, combined with the wide energy coverage from NuMI, will help improve our understanding of complex interaction models, particularly Final State Interactions (FSIs), and will provide valuable input for future DUNE analyses.