2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183932We summarize theoretical explanations of the three $σ$ discrepancy between $\sin^2 θ_W$ measured by NuTeV and predicted by the Standard Model global fit. Possible new physics explanations ({\it e.g.} an unmized $Z'$) are not compelling. The discrepancy would be reduced by a positive momentum asymmetry $s^-$ in the strange sea; present experimental estimates of $s^-$ are unreliable or incomplete. Upgrading the NuTeV analysis to NLO would alleviate concerns that the discrepancy is a QCD effect.(proceedings for the NuFact'02 Workshop); reference and footnote added, following the NuTeV proceedingsHigh Energy Physics - Phenomenologytext