Microscopic calculation of two-particle-two-hole meson-exchange currents in 40Ar and asymmetric scaling properties for neutrino and electron scattering
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 i...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2025 |
| País: | España |
| Recursos: | Universidad de Huelva (UHU) |
| Repositório: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglês |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/27988 |
| Acesso em linha: | https://hdl.handle.net/10272/27988 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Electroweak interaction Electroweak interactions in nuclear physics Lepton induced nuclear reactions Nuclear reactions Neutrinos 2207 Física Atómica y Nuclear 2207.19 Estructura Nuclear |
| Resumo: | 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. |
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