Martínez Consentino, Víctor LeopoldoSegovia González, JorgeAmaro Soriano, José Enrique2026-02-202026-02-202025Martinez-Consentino, V. L., Segovia, J., & Amaro, J. E. (2025). Microscopic calculation of two-particle-two-hole meson-exchange currents in 40Ar and asymmetric scaling properties for neutrino and electron scattering. Physical Review D, 112(11). https://doi.org/10.1103/sp1t-j8yy2470-00102470-0029 (electrónico)https://hdl.handle.net/10272/27988We present a microscopic calculation of two-particle–two-hole meson-exchange current response functions in asymmetric nuclei, with particular emphasis on the 40Ar nucleus. Employing a relativistic mean-field and relativistic Fermi gas framework, we compute the nuclear response for 40Ar and compare it with that of the symmetric 40Ca nucleus, analyzing the role of proton-neutron imbalance. The model incorporates distinct proton and neutron Fermi momenta to accurately capture the nuclear dynamics of systems with Z ≠ N. Our results indicate that using 40Ca as a proxy for 40Ar leads to a systematic error of approximately 10%. Additionally, we propose an asymmetric scaling formula to obtain the two-particle–two-hole response for arbitrary nuclei from the 12C response, improving the description of asymmetric nuclei. Finally, we benchmark our predictions against inclusive electron scattering and neutrino cross sections.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Electroweak interactionElectroweak interactions in nuclear physicsLepton induced nuclear reactionsNuclear reactionsNeutrinosjournal article10.1103/sp1t-j8yyopen access2207 Física Atómica y Nuclear2207.19 Estructura Nuclear