Measurement of the W mass at LEP and recent Results of the Electroweak Fit

TL;DR

This paper reports the combined measurement of the W boson mass at LEP, its integration into electroweak fits, and discusses implications for the Standard Model, highlighting recent results and their significance.

Contribution

It provides a precise combined measurement of the W boson mass and updates electroweak fit results, enhancing tests of the Standard Model.

Findings

W boson mass measured as 80.412 ± 0.042 GeV

Electroweak fit results are updated with new measurements

Results support the consistency of the Standard Model

Abstract

The measurement of the mass of the W boson, m_W, by direct reconstruction is described. The combination of all measurements of the four LEP experiments yields m_W = 80.412 +- 0.042 GeV. Together with several other measurements the extracted m_W value enters the electroweak fit, which tests the Standard Model (SM) predictions and extracts SM parameters which have not yet been measured. The latest results of the fit are presented.