energy, so a good understanding of these effects is important.

Neutrino interaction generators typically use the relativistic Fermi gas (RFG) model of the nucleus for all neutrino-nucleus interactions because of its simplicity. In the RFG model, all possible nucleon momentum states are filled up to the Fermi momentum, there is a constant binding energy required to separate the nucleon from the nucleus, and the neutrino interacts with a single bound nucleon. Neutrino-nucleon CCQE scattering for free nucleons is described by the Llewellyn-Smith formalism [@llewellyn-smith], which has been extended to cover neutrino-nucleus CCQE scattering in the Smith-Moniz RFG model [@smith-moniz], where nucleons bound within the nucleus are described by the RFG nuclear model. The only parameter of the weak current or in the RFG model which is not well constrained by electron scattering data [@review; @moniz:fg_escat] is the axial mass, [$M_{\textrm{A}}$]{}. Results from a global analysis of neutrino-deuterium scattering experiments and pion electroproduction data find ${\ensuremath{M_{\textrm{A}}}\xspace}= 1.00\pm0.02$GeV/$c^{2}$ [@bba03], which is consistent with other analyses [@axialStructure; @kuzmin_2006; @kuzmin_2008]. These results are also consistent with high energy neutrino beam experiments on heavy nuclear targets [@NOMAD_CCQE].\
Recent differential CCQE cross section results from the [MiniBooNE]{}collaboration [@mb-ccqe-2010; @mb-ccqe-antinu-2013] are significantly higher than expectation, which can 