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Meson-exchange currents in quasielastic charged-current neutrino reactions with single-nucleon knockout

P. R. Casale1,*, J. E. Amaro1,†, V. Belocchi2,3,4, M. B. Barbaro2,3, and M. Martini5,6

  • *Contact author: palomacasale@ugr.es
  • †Contact author: amaro@ugr.es
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Phys. Rev. C 112, 065502 – Published 17 December, 2025

DOI: https://doi.org/10.1103/cp3s-sch1

Abstract

The effect of meson-exchange currents on charged-current quasielastic neutrino scattering with single-nucleon emission is computed and analyzed within the relativistic Fermi gas model. This contribution arises primarily from the interference between one-body and two-body currents, where the two-body operator excites a 1p1h state in the presence of a second, spectator nucleon. The results obtained show a reduction of the vector, axial, and vector-axial transverse response functions and, consequently, a decrease in the total neutrino cross section. In addition to a comparison with the nonrelativistic limit, other models are also explored, such as the relativistic mean field model for nuclear matter and superscaling analysis with relativistic effective mass, both of which yield qualitatively similar results.

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Phys. Rev. C 112, 065502– Published 17 December, 2025
  • Received 29 July 2025
  • Accepted 24 November 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

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