2009

Measurement of the W boson mass

The D0 Collaboration, Abazov, V.

Understand

We present a measurement of the W boson mass in W -> ev decays using 1 fb^-1 of data collected with the D0 detector during Run II of the Fermilab Tevatron collider.

  • With a sample of 499830 W -> ev candidate events, we measure M_W = 80.401 +- 0.043 GeV.
  • This is the most precise measurement from a single experiment.

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