Measurement of mass and width of the W boson at LEP (original) (raw)

Leonello Servoli

1999, Physics Letters B

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21 pages

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We report on measurements of the mass and total decay width of the W boson with the L3 detector at LEP. W-pair events produced in e + e − interactions between 161 GeV and 183 GeV centre-of-mass energy are selected in a data sample corresponding to a total luminosity of 76.7 pb −1 . Combining all final states in W-pair production, the mass and total decay width of the W boson are determined to be M W = 80.61 ± 0.15 GeV and Γ W = 1.97 ± 0.38 GeV, respectively.