### W Mass Measurementsfrom the Tevatron.

Thomas Riddick
The CDF collaboration has analysed $2.2 \text{~fb}^{-1}$ of Run II electron and muon data for a new precise determination of the mass of the $W$ boson; the result obtained is $m_{W} = 80.387 \pm 0.019 \text{~MeV/c}^{2}$. The D\O\ collaboration has analysed $4.3 \text{~fb}^{-1}$ of Run II electron data for a new precise determination of the mass of the $W$ boson; when combined with a previous D\O\ collaboration measurement using $1 \text{~fb}^{-1}$, the result obtained is...