Precision Electroweak Measurements and Constraints on the Standard Model

TL;DR

This paper analyzes precision electroweak measurements from LEP, SLC, and Tevatron to constrain Standard Model parameters and predict outcomes for low-$Q^2$ experiments, updating key measurements like W-boson and top quark masses.

Contribution

It provides updated constraints on Standard Model parameters using recent high-$Q^2$ electroweak data and compares these with other experimental results, refining theoretical predictions.

Findings

Updated W-boson mass and width measurements

Refined top quark mass estimates

Consistent constraints on Standard Model parameters

Abstract

This note presents constraints on Standard Model parameters using published and preliminary precision electroweak results measured at the electron-positron colliders LEP and SLC. The results are compared with precise electroweak measurements from other experiments, notably CDF and D{\O}at the Tevatron. Constraints on the input parameters of the Standard Model are derived from the results obtained in high-$Q^2$ interactions, and used to predict results in low-$Q^2$ experiments, such as atomic parity violation, M{\o}ller scattering, and neutrino-nucleon scattering. The main changes with respect to the experimental results presented in 2007 are new combinations of results on the W-boson mass and width and the mass of the top quark.