Home > Research > Publications & Outputs > W boson polarisation at LEP2

Associated organisational unit

View graph of relations

W boson polarisation at LEP2

Research output: Contribution to journalJournal article

Published
  • G Abbiendi
  • C Ainsley
  • P F Akesson
  • G Alexander
  • J Allison
  • P Amaral
  • G Anagnostou
  • K J Anderson
  • S Arcelli
  • S Asai
  • D Axen
  • G Azuelos
  • I Bailey
  • E Barberio
  • T Barillari
  • R J Barlow
  • R J Batley
  • P Bechtle
  • T Behnke
  • K W Bell
  • P J Bell
  • G Bella
  • A Bellerive
  • G Benelli
  • S Bethke
  • O Biebel
  • O Boeriu
  • P Bock
  • M Boutemeur
  • S Braibant
  • L Brigliadori
  • R M Brown
  • K Buesser
  • H J Burckhart
  • S Campana
  • R K Carnegie
  • A A Carter
  • J R Carter
  • C Y Chang
  • D G Charlton
  • C Ciocca
  • J Couchman
  • A Csilling
  • M Cuffiani
  • S Dado
  • A De Roeck
  • E A De Wolf
  • K Desch
  • B Dienes
  • M Donkers
  • OPAL Collaboration
Close
<mark>Journal publication date</mark>15/04/2004
<mark>Journal</mark>Physics Letters B
Issue number3-4
Volume585
Number of pages14
Pages (from-to)223-236
Publication statusPublished
Original languageEnglish

Abstract

Elements of the spin density matrix for W bosons in e(+)e(-) --> W+W- --> q (q) over barq'lv(l) events are measured from data recorded by the OPAL detector at LEP. This information is used to calculate polarised differential cross-sections and to search for CP-violating effects. Results are presented for W bosons produced in e+e- Collisions with centre-of-mass energies between 183 GeV and 209 GeV. The average fraction of W bosons that are longitudinally polarised is found to be (23.9 +/- 2.1 +/- 1.1)% compared to a Standard Model prediction of (23.9 +/- 0.1)%. All results are consistent with CP conservation. (C) 2004 Elsevier B.V. All rights reserved.