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Superscaling analysis of inclusive electron scattering and its extension to charge-changing neutrino-nucleus cross sections beyond the relativistic Fermi gas approach

AutorAntonov, A. N.; Ivanov, M. V.; Gaidarov, M. K.; Moya de Guerra, Elvira ; Caballero, Juan Antonio ; Barbaro, M. V.; Udias, J. M. ; Sarriguren, Pedro
Palabras clave[PACS] Lepton-induced reactions
[PACS] Nuclear structure models and methods
[PACS] Neutrino-induced reactions
[PACS] Charge distribution
Fecha de publicación10-nov-2006
EditorAmerican Physical Society
CitaciónPhysical Review C 74(5): 054603 (2006)
ResumenSuperscaling analyses of inclusive electron scattering from nuclei are extended from the quasielastic processes to the delta excitation region. The calculations of (e, e´) cross sections for the target nucleus 12C at various incident electron energies are performed using scaling functions f (ψ´) obtained in approaches going beyond the mean-field approximation, such as the coherent density fluctuation model (CDFM) and the one based on the light-front dynamics method. The results are compared with those obtained using the relativistic Fermi gas (RFG) model and the extended RFG model (ERFG). Our method utilizes in an equivalent way both basic nuclear quantities, density and momentum distributions, showing their role for the scaling and superscaling phenomena. The approach is extended to consider scaling function for medium and heavy nuclei with Z ≠ N for which the proton and neutron densities are not similar. The asymmetry of the CDFM quasielastic scaling function is introduced, simulating in a phenomenological way the effects that violate the symmetry for ψ´≥0, including the role of the final-state interaction. The superscaling properties of the electron scattering are used to predict charge-changing neutrino-nucleus cross sections at energies from 1 to 2 GeV. A comparison with the results of the ERFG model is made. The analyses make it possible to gain information about the nucleon correlation effects on both local density and nucleon momentum distributions.
Descripción15 pages, 1 table, 16 figures.-- PACS nrs.: 25.30.-c; 21.60.-n; 25.30.Pt; 21.10.Ft.-- ArXiv pre-print available at: http://arxiv.org/abs/nucl-th/0609056v1
Versión del editorhttp://dx.doi.org/10.1103/PhysRevC.74.054603
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