Precise measurements of the W mass at the Tevatron and indirect constraints on the Higgs mass

TL;DR

This paper reports precise measurements of the W boson mass from Tevatron experiments, combining results from D0 and CDF, and discusses the implications for the Standard Model Higgs boson mass constraints.

Contribution

It provides the most accurate combined W boson mass measurement from Tevatron data and explores its impact on indirect Higgs mass constraints.

Findings

World average W mass: 80.385 ± 0.015 GeV

Improved precision over previous measurements

Implications for Higgs boson mass constraints

Abstract

I describe the latest D0 and CDF W boson mass measurements. The D0 measurement is performed with $4.3\, fb^{-1}$ of integrated luminosity in the electron decay channel with a data set of $1.68\times 10^{6}$ W candidates. The value of the W boson mass measured by D0 is $M_W = 80.375\pm 0.023\, GeV$ when combined with the previously analyzed $1\, fb^{-1}$ of integrated luminosity. The CDF measurement uses $2.2\, fb^{-1}$ of integrated luminosity in both electron and muon decay channels with a total of $1.1\times 10^{6}$ W candidates. The value of the W boson mass measured by CDF is $M_W = 80.387\pm 0.019\, GeV$. I report the combination of these two measurements with previous Tevatron measurements and with the LEP measurements of the W boson mass. The new world average is $M_W = 80.385\pm 0.015\, GeV$. I discuss the implications of the new measurement to the indirect measurement of the Standard Model Higgs boson mass.