W mass and width measurements at the Tevatron

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.

To appear in the proceedings of 42st Rencontres de Moriond on QCD and Hadronic interactions, La Thuile, Aosta Valley, Italy, 17-24 March 2007. Four pages, six figures