Title: "Direct Measurement of the W Boson Width"

Abstract:

We present a direct measurement of the W boson width using ~370 pb-1 and 330 pb-1 of CDF Run 2 data for the electron and muon decay channels respectively. The measurement is made by fitting to the tail of the transverse mass distribution, exploiting the slower fall-off of the Breit Wigner width component compared to the gaussian resolution component.