Standard Model Explanations for the NuTeV Electroweak Measurements

TL;DR

This paper examines the discrepancy between NuTeV's measurements of electroweak parameters and Standard Model predictions, exploring possible explanations within the Standard Model framework.

Contribution

It provides a detailed analysis of the NuTeV anomaly and discusses potential Standard Model explanations for the observed deviation.

Findings

NuTeV measurement of sin^2 theta_W is three standard deviations above prediction.

The paper discusses possible Standard Model sources of the discrepancy.

Analysis suggests systematic effects or parton distribution uncertainties may explain the anomaly.

Abstract

The NuTeV Collaboration has measured the electroweak parameters sin^2 theta_W and rho in neutrino-nucleon deep-inelastic scattering using a sign-selected beam. The nearly pure neutrino or antineutrino beams that result provide many of the cancellations of systematics associated with the Paschos-Wolfenstein relation. The extracted result for sin^2 theta_W(on-shell) is three standard deviations from prediction. We discuss Standard Model explanations for the puzzle.