Consistent analysis of neutral- and charged-current neutrino scattering off carbon

Background. Good understanding of the cross sections for (anti) neutrino scattering off nuclear targets in the few-GeV energy region is a prerequisite for the correct interpretation of results of ongoing and planned oscillation experiments. Purpose. Clarify a possible source of disagreement between recent measurements of the cross sections on carbon. Method. Nuclear effects in (anti) neutrino scattering off carbon nucleus are described using the spectral function approach. The effect of two- and multinucleon final states is accounted for by applying an effective value of the axial mass, fixed to 1.23 GeV. Neutral-current elastic (NCE) and charged-current quasielastic (CCQE) processes are treated on equal footing. Results. The differential and total cross sections for the energy ranging from a few hundreds ofMeV to 100 GeV are obtained and compared to the available data from the BNL E734, MiniBooNE, and NOMAD experiments. Conclusions. Nuclear effects in NCE and CCQE scattering seem to be very similar. Within the spectral function approach, the axial mass from the shape analysis of the MiniBooNE data is in good agreement with the results reported by the BNL E734 and NOMAD Collaborations. However, the combined analysis of the NCE and CCQE data does not seem to support the contribution of multinucleon final states being large enough to explain the normalization of the MiniBooNE-reported cross sections.