@article{10272/27988,
year = {2025},
url = {https://hdl.handle.net/10272/27988},
abstract = {We 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.},
organization = {The work was supported by Grant No. PID2023-147072NB-I00 funded by MICIU/AEI/10.13039/501100011033 and by ERDF/EU; by Grant No. FQM-225 funded by Junta de Andalucia. V. L.M.-C. acknowledges financial support provided by Ministerio Español de Ciencia, Innovación y Universidades under Grant No. PID2022-140440NBC22; Junta de Andalucía under Contracts No. PAIDI FQM- 370 and No. PCI+D+i under the title: “Tecnologías avanzadas para la exploración del universo y sus componentes” (Code No. AST22-0001).},
publisher = {American Physical Society},
title = {Microscopic calculation of two-particle-two-hole meson-exchange currents in 40Ar and asymmetric scaling properties for neutrino and electron scattering},
doi = {10.1103/sp1t-j8yy},
author = {Martínez Consentino, Víctor Leopoldo and Segovia González, Jorge and Amaro Soriano, José Enrique},
}