Abstract
We evaluate the neutral current quasi-elastic neutrino cross section within two nuclear models: the SuSA model, based on the superscaling behavior of electron scattering data, and the RMF model, based on relativistic mean field theory. We also estimate the ratio (νp→νp)/(νN→νN) and compare with the MiniBooNE experimental data, performing a fit of the parameters MA and gA(s) within the two models. Finally, we present our predictions for antineutrino scattering.
Highlights
The study of neutral current mediated quasi-elastic (NCQE) neutrino–nucleus scattering in the GeV region is a powerful tool for hadronic and nuclear studies
Results corresponding to the two models mentioned above as well as the relativistic Fermi gas (RFG) are shown in Fig. 1 as functions of the “quasi-elastic” four-momentum transfer Q QE defined in [10] or of the outgoing nucleon kinetic energy T N
The values of the axial mass obtained with both models are compatible, within 1-σ, with the value M A = 1.35 GeV employed by the MiniBooNE collaboration to fit their RFG model to the charged current quasi-elastic (CCQE) data
Summary
The study of neutral current mediated quasi-elastic (NCQE) neutrino–nucleus scattering in the GeV region is a powerful tool for hadronic and nuclear studies. If one sticks to a simple nuclear description, such as the RFG model, presently used in neutrino interaction generators, the experimental increase in the cross section can be obtained by introducing a nucleon axial mass M A = 1.35 GeV, significantly larger than the
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