Measurement of the W mass and width in e+e- collisions at 183 GeV

The OPAL Collaboration

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19 Scopus citations


Using a data sample of 57 pb-1 recorded at a centre-of-mass energy of 183 GeV with the OPAL detector at LEP, 282 W+W- → qq̄qq̄ and 300 W+W- → qq̄lv̄l candidate events are used to obtain a measurement of the mass of the W boson, Mw = 80.39 ± 0.13(stat.) ± 0.05(syst.) GeV, assuming the Standard Model relation between Mw and TW. A second fit provides a direct measure of the width of the W boson and gives TW = 1.96 ± 0.34(stat.) + 0.20(syst.) GeV. These results are combined with previous OPAL results to obtain Mw = 80.38 ± 0.12(stat.) + 0.05(syst.) GeV and Tw = 1.84 ± 0.32(stat.) ± 0.20(syst.) GeV.

Original languageEnglish
Pages (from-to)138-152
Number of pages15
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - 1 Jan 1999
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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