https://doi.org/10.1140/epja/s10050-023-01171-9
Regular Article - Theoretical Physics
Neutral-current neutrino-nucleus scattering within QRPA models
1
Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, CEP 22290-180, Urca, RJ, Brazil
2
Departamento de Ciências Exatas e Tecnológicas, Universidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Rod. Jorge Amado Km 16, CEP 45662-900, Ilhéus, BA, Brazil
3
Departamento de Física, Universidad Nacional de La Plata, C.C. 67, 1900, La Plata, Argentina
4
Instituto de Física La Plata, CONICET, 1900, La Plata, Argentina
Received:
29
June
2023
Accepted:
17
October
2023
Published online:
7
November
2023
Recently a new formalism to describe charged-current (CC) neutrino-nucleus reactions has been developed (Krmpotić et al., Phys Rev C 71:044319, 2005). Here, we have extended this model to describe neutrino-nucleus reactions via neutral-current (NC). As the weak interaction observables showed to be very sensitive to the structure of nuclear states, the use of microscopic nuclear structure models in a consistent theoretical framework are therefore essential for a quantitative description of neutrino-nucleus reactions. In previous calculations, we described the nuclear part of these charge-exchange reactions within the Projected pn-QRPA (PQRPA) and usual pn-QRPA. In this work, we implemented the charge-conserving QRPA (ccQRPA), taking into account the proton-proton, neutron-neutron and proton-neutron pairing correlations. We evaluated inelastic neutrino-nucleus cross sections for 
C and 
Ar comparing to other nuclear models in the literature. The cross sections for C are folded by Michel spectrum, where a good agreement between our result and the experimental data for 
[
MeV] (Drexlin et al., in Proceedings of the Neutrino Workshop, Heidelberg, 1987. Springer-Verlag, Berlin, 1987; Drexlin et al., Phys Lett B 267:321, 1991; Zeitnitz, Prog Part Nucl Phys 32:351, 1994; Kleinfellner et al., in Proceedings of the XIII International Conference on Particles and Nuclei, Perugia, Italy, 1993) is achieved. For Ar, the competition between Gamow-Teller (GT) and dipole transitions showed to be an important ingredient to understand these reactions, that appears as the backgrounds to neutrinos appearance in the far detector in DUNE experiment.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
