Speaker
Description
The ND-LAr 2×2 (Near Detector Liquid Argon 2×2) is a prototype, pixel-based, modular Liquid Argon Time Projection Chamber (LArTPC) designed for the Deep Underground Neutrino Experiment (DUNE), a next-generation long-baseline neutrino oscillation experiment. It is a 2.4-tonne active-mass LArTPC that serves as a demonstrator for the final DUNE Near Detector (ND-LAr). ND-LAr 2×2 was exposed to neutrinos from the Neutrinos at the Main Injector (NuMI) beam at Fermi National Accelerator Laboratory (Fermilab). Antineutrino-mode data collected over a 4.5-day period in 2024 include approximately 30,000 neutrino interactions in the liquid-argon active volume—the first neutrino interactions reported by a DUNE detector prototype. This dataset has enabled studies of charged-current (CC) muon-antineutrino interactions. Physics analyses in preparation include measurements of final-state charged-particle distributions in both inclusive and mesonless topologies. This poster will highlight selected observed interactions and describe the current status and prospects for developing antineutrino analyses.