The W boson spin density matrix at OPAL

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dc.contributor.author Bailey, Ian Richard. en_US
dc.date.accessioned 2008-04-10T05:58:13Z
dc.date.available 2008-04-10T05:58:13Z
dc.date.copyright 2004 en_US
dc.date.issued 2008-04-10T05:58:13Z
dc.identifier.uri http://hdl.handle.net/1828/473
dc.description.abstract The spin states of W bosons in e+e- -t W+W- -t q$tvc events recorded by the OPAL detector at LEP are determined by an analysis of the angular distributions of their d e cay products. 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 percentage of longitudinally polarised W bosons measured from the data is found to be (23.9 f 2.1 + 1.1)% compared to a Standard Model prediction of (23.9 f 0.1)%. All results are consistent with CP conservation. en_US
dc.subject.lcsh W bosons en_US
dc.title The W boson spin density matrix at OPAL en_US
dc.contributor.supervisor Keeler, Richard K. en_US
dc.degree.department Dept. of Physics and Astronomy en_US

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