Neutrino Physics Without Oscillations

There is a tremendous potential for neutrinos to yield valuable new information about strongly interacting systems. Here we provide a taste of this potential, beginning with the existence of a rigorous sum rule for the proton and neutron spin structure functions based on the measurement of the flavor singlet axial charge of the nucleon. We also comment on the NuTeV report of a 3$σ$ deviation of the value of $\sin^2 θ_W$ measured in neutrino (and anti-neutrino) scattering from that expected within the Standard Model.

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