Nuclear Effects on the Extraction of $\sin^2θ_W$

We study the impact of nuclear effects on the extraction of the weak-mixing angle $\sin^2\theta_W$ from deep inelastic (anti-)neutrino-nucleus scattering, with special emphasis on the recently announced NuTeV Collaboration 3$\sigma$ deviation of $\sin^2\theta_W$ from its standard model value. We have found that nuclear effects which were not taken into account by the NuTeV Collaboration analysis may well be of the same size as the reported deviation.