W mass and width measurements at the Tevatron

TL;DR

This paper reports the most precise measurements to date of the W boson mass and width using data from the CDF Run II experiment, employing a fit to the transverse mass distribution in electron and muon decay channels.

Contribution

It provides the most accurate single measurements of the W boson mass and width, improving precision over previous results.

Findings

W boson mass measured as 80413 +/- 48 MeV

W boson width measured as 2032 +/- 71 MeV

Results are the world's most precise to date

Abstract

I present a measurement of the W boson mass (M_W) and width (G_W) using 200 and 350 pb-1 of CDF Run II data respectively. The measurements, performed in both the electron and muon decay channels, rely on a fit to the W transverse mass distribution. We measure M_W = 80413 +/- 48 MeV and G_W = 2032 +/- 71 MeV which represent the world's single most precise measurements to date.