Radiatively Generated Isospin Violations in the Nucleon and the NuTeV Anomaly

Details Radiatively Generated Isospin Violations in the Nucleon and the NuTeV Anomaly Radiatively Generated Isospin Violations in the Nucleon and the NuTeV Anomaly

2005-03-11

arxiv.org/abs/hep-ph/0503103v1

Phys.Rev.Lett. 95 (2005) 022002

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.95.022002

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

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