High Energy Physics - Phenomenology
[Submitted on 27 Jul 2025
]
Title: Meson-Exchange Currents in Quasielastic CC Neutrino Reactions with Single-Nucleon Knockout
Title: 介子交换电流在单核子剥离的准弹性CC中微子反应中的作用
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.
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