The W boson spin density matrix at OPAL

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dc.contributor.authorBailey, Ian Richard.en_US
dc.contributor.supervisorKeeler, Richard K.en_US
dc.date.accessioned2008-04-10T05:58:13Z
dc.date.available2008-04-10T05:58:13Z
dc.date.copyright2004en_US
dc.date.issued2008-04-10T05:58:13Z
dc.degree.departmentDept. of Physics and Astronomyen_US
dc.description.abstractThe 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.identifier.urihttp://hdl.handle.net/1828/473
dc.subject.lcshW bosonsen_US
dc.titleThe W boson spin density matrix at OPALen_US

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