A phenomenological model of two-body current (2p2h) contribution to neutrino cross section is introduced. Predictions of the Valencia model for 2p2h [J. Nieves et al., Phys. Rev. C 83, 045501 (2011)] are modified using recent $\mathrm{CC}0\pi$ measurements from T2K and MINERvA experiments. Our results suggest a significant increase of the 2p2h cross section at neutrino energies bigger than 1 GeV and also a redistribution of 2p2h events as function of energy and momentum transfer. This may have a big impact on neutrino energy reconstruction in neutrino oscillation parameters.

• Received 3 March 2020
• Accepted 2 June 2020

DOI:https://doi.org/10.1103/PhysRevC.102.015502

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Published by the American Physical Society