Scaling Properties of Two-Particle–Two-Hole Responses in Asymmetric Nuclei for Neutrino Scattering Within the Relativistic Mean-Field Framework Martínez Consentino, Víctor Leopoldo Amaro Soriano, José Enrique Segovia, Jorge Neutrino scattering Electron scattering Meson-exchange currents We perform a systematic analysis of the nuclear dependence of two-particle–two-hole meson-exchange current contributions to inclusive lepton-nucleus scattering within the relativistic mean-field framework. We present microscopic calculations of nuclear responses for a set of 17 nuclei, ranging from helium to uranium, using a model with different Fermi momenta for protons and neutrons. We propose a novel scaling prescription based on the two-particle phase space and key nuclear parameters. The resulting description is accurate over a wide range of nuclear targets, with typical deviations below 10%, and allows for a separate treatment of the different emission channels. In addition, a consistent benchmark against electron-scattering data is provided. The parametrization presented provides a practical framework for extending the responses to different nuclear targets in neutrino event generators. 2026-02-20T11:34:36Z 2026-02-20T11:34:36Z 2026-02-20 journal article Martinez-Consentino, V. L., Amaro, J. E., & Segovia, J. (2026). Scaling Properties of Two-Particle–Two-Hole Responses in Asymmetric Nuclei for Neutrino Scattering Within the Relativistic Mean-Field Framework. Universe, 12(2), 56. https://doi.org/10.3390/universe12020056 https://hdl.handle.net/10481/111308 10.3390/universe12020056 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI