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Measurement of the mass and the width of the W boson at LEP

  • The L3 Collaboration
Experimental Physics

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–1 of data collected at centre-of-mass energies between 161 and 209 GeV. Combining semi-leptonic and fully-hadronic final states, the mass and the width of the W boson are determined to be
$$ \begin{array}{*{20}c} {m_{{\text{W}}} = 80.270}{ \pm 0.046}{ \pm 0.031\;{\text{GeV}}}{{\text{and}}} \\ {\Gamma _{{\text{W}}} = 2.18}{ \pm 0.11}{ \pm 0.09\;{\text{GeV}}}{} \\ \end{array} $$
where the first uncertainty is statistical and the second systematic.

Keywords

Field Theory Elementary Particle Quantum Field Theory Decay Width Total Decay Width 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag 2006

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  • The L3 Collaboration

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