The recently published [A. A. Aguilar-Arevalo (MiniBooNE Collaboration), Phys. Rev. D 81, 092005 (2010)] MiniBooNE charge current quasielastic double differential cross-section data are analyzed and compared with simulations based on two nuclear models: Fermi gas model and spectral function model. In both cases the axial mass parametr $M_A$ is obtained from a fitting procedure which takes into account the multiplicative factor in the uncertainty of the flux. Bins with large ($>50\%$) contribution from events with small momentum transfer ($q<q_{\mathrm{cut}}$) are eliminated from the analysis. More restrictive cuts result in smaller fitted $M_A$ values. The $q_{\mathrm{cut}}=500$ MeV/$c$ leads to the value of $M_A=1350\pm 66$ MeV in the Fermi gas model and $M_A=1343\pm 60$ MeV in the spectral function model. In both cases the value of $M_A=1030$ MeV is excluded at the confidence level greater than $5\sigma$.

• Received 21 July 2010

DOI:https://doi.org/10.1103/PhysRevC.82.045502