Standard Model Explanations for the NuTeV Electroweak Measurements

الأصل · EN

The NuTeV Collaboration has measured the electroweak parameters sin² thetaW 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 sin² thetaW(on-shell) is three standard deviations from prediction. We discuss Standard Model explanations for the puzzle.