Abstract
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 language | English (US) |
---|---|
Pages (from-to) | 147-156 |
Number of pages | 10 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 557 |
Issue number | 3-4 |
DOIs | |
State | Published - Apr 3 2003 |
Bibliographical note
Publisher Copyright:© 2003 Published by Elsevier Science.