Muon Antineutrino Charged-Current Mesonless Cross-section Measurement with the 2x2 Demonstrator

The Deep Underground Neutrino Experiment (DUNE) is a precision long-baseline neutrino oscillation experiment that will employ liquid argon time projection chamber (LArTPC) technology in a near detector placed at Fermilab and a far detector at the Sanford Underground Research Facility 1300 km away. The DUNE Liquid Argon Near Detector (ND-LAr) design uses several optically separated LArTPCs instrumented with a pixel-based 3D charge readout alongside scintillation light traps to disentangle the O(50) neutrino events expected per 10us beam spill. The 2x2 Demonstrator is a two-by-two array of four modules scaled down from the ND-LAr design placed between repurposed MINERvA tracking planes in the NuMI beam at Fermilab. In addition to guiding the ND-LAr design and demonstrating its performance, this detector will provide key antineutrino interaction measurements on argon in the few-GeV energy range. This talk will cover the status of the muon neutrino charged-current cross-section measurement with zero mesons in the final state, as well as the efforts to prepare the data for physics analysis.