Measurement of W polarisation at LEP

Achard, P. ; Adriani, O. ; Aguilar-Benitez, M. ; Gurtu, A. ; et., al (2003) Measurement of W polarisation at LEP Physics Letters B, 557 (3-4). pp. 147-156. ISSN 0370-2693

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The three different helicity states of W bosons produced in the reaction e+e-→W+W-→ℓνqq-1at 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 W bosons, and its dependence on the W boson production angle. The fraction of longitudinally polarised W bosons 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.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:83656
Deposited On:21 Feb 2012 14:51
Last Modified:21 Feb 2012 14:51

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