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This is an open access article under the CC BY license. ; Double- and single-differential cross sections for inclusive charged-current νμ-nucleus scattering are reported for the kinematic domain 0 to 2 GeV/c in three-momentum transfer and 0 to 2 GeV in available energy, at a mean νμ energy of 1.86 GeV. The measurements are based on an estimated 995,760 νμ charged-current (CC) interactions in the scintillator medium of the NOvA Near Detector. The subdomain populated by 2-particle-2-hole (2p2h) reactions is identified by the cross section excess relative to predictions for νμ-nucleus scattering that are constrained by a data control sample. Models for 2-particle-2-hole processes are rated by χ2 comparisons of the predicted-versus-measured νμ CC inclusive cross section over the full phase space and in the restricted subdomain. Shortfalls are observed in neutrino generator predictions obtained using the theory-based València and SuSAv2 2p2h models. © 2025 authors. Published by the American Physical Society. ; University of Minnesota, UMN; National Science Foundation, NSF; Science and Technology Facilities Council, STFC; GA UK, Czech Republic; Department of Science and Technology, Ministry of Science and Technology, India, DST; Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq; Russian Foundation for Basic Research, RFBR; U.S. Department of Energy, USDOE; Fundação de Amparo à Pesquisa do Estado de Goiás, FAPEG; Fermilab, FNAL; Office of Science, SC; Royal Society; European Research Council, ERC; Ministry of Science and Higher Education of the Russian Federation; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; Rochester Academy of Science, RAS; UK Research and Innovation, UKRI; Fermi Research Alliance, LLC, (DE-AC02-07CH11359) ; This document was prepared by the NOvA collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under ... |