Eur Phys J C (2004) 33: s714-s716
https://doi.org/10.1140/epjcd/s2004-03-1743-y

PS07 Tests of the Standard Model

W polarisation studies at LEP2

ETH Zürich, 8093 Zürich,  

Received: 5 November 2003
Accepted: 20 January 2004
Published online: 4 March 2004

Abstract

Studies of W boson polarisation properties performed using the W pair production process at LEP2 are presented. Measurements of the Spin Density Matrix elements and of the polarised cross sections are performed yielding good agreement with the Standard Model and no evidence for CP or CPT violation. The fraction of longitudinally polarised W bosons has been measured to be in agreement with the Standard Model prediction. Indications for W spin correlations are presented as well as a measurement of decay plane correlations.

PACS: 13.66.Fg Gauge and Higgs boson production in e^–e⁺ interactions – 14.70.Fm W bosons