We report cross-section measurements of the final-state muon kinematics for νμ charged-current interactions in the NOvA near detector using an accumulated 8.09×1020 protons on target in the NuMI beam. We present the results as a double-differential cross section in the observed outgoing muon energy and angle, as well as single-differential cross sections in the derived neutrino energy, Eν, and square of the four-momentum transfer, Q2. We compare the results to inclusive cross-section predictions from various neutrino event generators via χ2 calculations using a covariance matrix that accounts for bin-to-bin correlations of systematic uncertainties. These comparisons show a clear discrepancy between the data and each of the tested predictions at forward muon angle and low Q2, indicating a missing suppression of the cross section in current neutrino-nucleus scattering models.
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Published in Physical Review D, Volume 107, Issue 5, 2023, pages 052011-.
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Acero, M. A., Adamson, P., Aliaga, L., Н. Анфимов, A. Antoshkin, E. Arrieta-Diaz, Asquith, L., A. Aurisano, Back, A., Baird, M., N. Balashov, Baldi, P., Bambah, B. A., Bashar, S., Bays, K., Behera, B. R., Bernstein, R. H., Bhatnagar, V., Bhattarai, D., & Bhuyan, B. (2023). Measurement of the double-differential muon-neutrino charged-current inclusive cross section in the NOvA near detector. Physical Review D, 107(5). https://doi.org/10.1103/physrevd.107.052011