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W polarisation and spin density matrix measurements at LEP

✍ Scribed by H. Voss

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
582 KB
Volume
117
Category
Article
ISSN
0920-5632

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✦ Synopsis

The helicity structure of the W-pair production is studied by the LEP experiments using either measurements of spin density matrix elements or a fit of the expected angular distribution of the different helicity states to the observed data. The measurements are in good agreement with the Standard Model expectation, clearly confirming the longitudinal component of the W-gauge-boson. The W-helicity is either observed for each Wboson individually or in correlation of the two bosons. The mesurements also provide a test for genuine CP violation, with the measurements confirming CP invariance.

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