We have considered in detail a five-quark model with right-handed current. The model has an additional parameter, cos²φ, apart from the usual θW, the Weinberg angle, and is able to account satisfactorily for all the charged-current and neutral-current data. Several tests for determining the parameters accurately are proposed. These include the asymptotic ratio of antineutrino to neutrino deep-inelastic scattering and neutral-to-charged-current ratios for deep-inelastic scattering, as well as elastic scattering off protons, direct decays of charmed mesons into neutral leptonic channels, effects in atomic physics, coherent neutrino-nucleus scattering, and ψ→νν decay.
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Das et al. (1977) studied this question.