Charge Symmetry Violating Contributions to Neutrino Reactions

Details Charge Symmetry Violating Contributions to Neutrino Reactions Charge Symmetry Violating Contributions to Neutrino Reactions

2003-01-18

arxiv.org/abs/hep-ph/0301147v3

Phys.Lett.B558:132-140,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 2 figures; Fig 2 replaced [CSV distribution calculated at low Q^2, evolved to 20 GeV^2]; table II changed

Scientific paper

10.1016/S0370-2693(03)00267-3

The NuTeV group has measured charged and neutral current reactions for neutrinos on iron targets. Ratios of these cross sections provide an independent measurement of the Weinberg angle. The NuTeV value for sin^2 theta_W is three standard deviations larger than the value measured in other electroweak processes. By reviewing theoretical estimates of parton charge symmetry violation (CSV), we study CSV contributions to the NuTeV measurement. We conclude that charge symmetry violating effects should remove roughly 30% of the discrepancy between the NuTeV result and other determinations of sin^2 theta_W.

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