Measurement of the Mass and the Width of the W Boson at LEP

Abstract

The mass and the total decay width of the W boson are measured with the L3 detector at the LEP e+e- collider using W-boson pairs produced in 0.7/fb of data collected at centre-of-mass energies between 161 and 209GeV. Combining semi-leptonic and fully-hadronic final states, the mass and the width of the W boson are determined to be mW = 80.270 +/- 0.046 +/- 0.031 GeV and GW = 2.18 +/- 0.11 +/- 0.09 GeV, where the first uncertainty is statistical and the second systematic.

References in corpus (5)

• Studies of Hadronic Event Structure in e+e- Annihilation from 30 GeV to 209 GeV with the L3 Detector
• Measurement of the Cross Section of W-boson pair production at LEP
• Calibration of centre-of-mass energies at LEP 2 for a precise measurement of the W boson mass
• Measurement of the Z-boson using e+e- -> Z gamma events at centre-of-mass energies above the Z pole
• Search for Colour Singlet and Colour Reconnection Effects in Hadronic Z Decays at LEP

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