It has been argued recently that the inclusive, semi-inclusive, and elastic neutrinohadron data require the neutral-current parameters to lie in one of two allowed regions in coupling-parameter space (called regions A and B). We remark in this paper that new measurements of ν(ν)p→ν(ν)p strongly favor region A [which corresponds to the standard SU(2)LU(1) and SU(2)LSU(2)RU(1) models] over region B [which corresponds to an SU(2) {} U(1) model with a (u, b)R doublet and dR singlet]. Neutral-current couplings of u and d quarks determined by this analysis are given.
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Sidhu et al. (1978) studied this question.
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