NOvA is a two-detector long-baseline neutrino oscillation experiment. It consists of a Near and Far Detector, which sit 1 km and 810 km, respectively, from the source of the NuMI neutrino beam. Both detectors sit 14 mrad off-axis, resulting in a beam of neutrinos with energy narrowly peaked around 2 GeV.
This thesis describes a cross-section analysis done at the Near Detector. A cross- section measurement was made for νμ charged-current interactions with a single charged pion in the final state. This measurement, the first of its kind in the NOvA Near Detector, is flux integrated and reported in bins of pion angle. The measurement was made using 13.8 × 1020 protons on target of neutrino beam, collected between 2014 and 2020. This measurement is sensitive to the transition region between the quasi-elastic and deep inelastic scattering regimes of neutrino-nucleus interactions.