Meson-Exchange Currents in Quasielastic Charged-Current Neutrino Reactions with Single-Nucleon Knockout
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 non-relativistic limit, other models are also explored, such as the relativistic mean field model for nuclear matter and the superscaling analysis with relativistic effective mass, both of which yield qualitatively similar results.
Keywords
Cite
@article{arxiv.2507.20246,
title = {Meson-Exchange Currents in Quasielastic Charged-Current Neutrino Reactions with Single-Nucleon Knockout},
author = {P. R. Casale and J. E. Amaro and V. Belocchi and M. B. Barbaro and Marco Martini},
journal= {arXiv preprint arXiv:2507.20246},
year = {2025}
}
Comments
25 pages, 19 figures. Revised version with new figures 17, 18, and 19