Measurement of W polarisation at LEP

L3 Collaboration

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


The three different helicity states of W bosons produced in the reaction e+e- →W+W-→lνqq-' at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies √s = 183-209 GeV are used to measure the polarisation of Wbosons, and its dependence on theWboson production angle. The fraction of longitudinally polarisedWbosons is measured to be 0.218 ± 0.027 ± 0.016 where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model expectation.

Original languageEnglish (US)
Pages (from-to)147-156
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - Apr 3 2003

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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