Interpretations of the NuTeV $\sin^2 θ_W$

Details Interpretations of the NuTeV $\sin^2 θ_W$ Interpretations of the NuTeV $\sin^2 θ_W$

2002-09-26

arxiv.org/abs/hep-ph/0209316v2

J.Phys.G29:2001-2004,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

(proceedings for the NuFact'02 Workshop); reference and footnote added, following the NuTeV proceedings

Scientific paper

10.1088/0954-3899/29/8/390

We summarize theoretical explanations of the three $\sigma$ discrepancy between $\sin^2 \theta_W$ 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.

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