Title: A Precise Measurement of the W Boson Mass from CDF

We have measured the $W$-boson mass M_W using data corresponding to 2.2~fb^-1 of integrated luminosity collected in p\bar{p} collisions at \sqrt{s}=1.96 TeV with the CDF II detector at the Fermilab Tevatron collider. Samples consisting of 470~126 W à e n candidates and 624~708 W à µ n candidates yield the measurement M_W = 80~387 ± 12_stat ± 15_syst = 80~387 ± 19 MeV/c². This is the most precise measurement of the W-boson mass to date.