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Vector and axial form factors in the quark resonance model are analyzed with a combination of theoretical and phenomenological arguments. The new form of form factors is deduced from Δ(1232) excitation models and available data. The vector part is shown to agree with the resonant contribution to electron-proton inclusive F₂ data. The axial part is obtained by finding a simultaneous fit to ANL and BNL dσdQ² neutrino scattering data. The best fit corresponds to C₅A(0)=0.88 in the Rarita-Schwinger formalism.
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Graczyk et al. (2008) studied this question.
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