Radiatively Generated Isospin Violations in the Nucleon and the NuTeV Anomaly

Abstract

Predictions of isospin asymmetries of valence and sea distributions are presented which are generated by QED leading $\mathcal{O}(\alpha )$ 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 ($s\ne \bar{s}$), the discrepancy between the large NuTeV `anomaly' result for ${\sin }^2{\theta }_W$ and the world average of other measurements is removed.

10 pages, 2 figures

References in corpus (4)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Parton distributions incorporating QED contributions
• Strange quark asymmetry in the nucleon and the NuTeV anomaly
• On the NuTeV anomaly and the asymmetry of the strange sea in the nucleon

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