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Radiatively Generated Isospin Violations in the Nucleon and the NuTeV Anomaly

M. Glück·P. Jimenez-Delgado·E. Reya
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Abstract

Predictions of isospin asymmetries of valence and sea distributions are presented which are generated by QED leading ${\cal{O}}(α)$ photon bremsstrahlung effects. Together with isospin violations arising from nonperturbative hadronic sources (such as quark and target mass differences) as well as with even a conservative contribution from a strangeness asymmetry ($s\neq \bar{s}$), the discrepancy between the large NuTeV `anomaly' result for $\sin^2θ_W$ and the world average of other measurements is removed.

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M. Glück, P. Jimenez-Delgado, E. Reya. 2005-03-11. Radiatively Generated Isospin Violations in the Nucleon and the NuTeV Anomaly. https://doi.org/10.1103/physrevlett.95.022002

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