A precise measurement of the $W$-boson mass with the Collider Detector at Fermilab

Abstract

We present a measurement of the $W$-boson mass, $M_W$, using data corresponding to 2.2/fb of integrated luminosity collected in ppbar collisions at $\sqrt{s}$ = 1.96 TeV with the CDF II detector at the Fermilab Tevatron. The selected sample of 470126 $W\to e\hat{I}½$ candidates and 624708 $W\to \hat{I}¼\hat{I}½$ candidates yields the measurement $M_W=80387\pm 12$ (stat) $\pm 15$ (syst)$=80387\pm 19$ MeV$/c^2$ . This is the most precise single measurement of the $W$-boson mass to date.

Submitted to Phys. Rev. D