Conclusions

In this thesis the CP-violating triple gauge coupling parameters have been measured from the LEP2 data with the ${\rm SU}(2)_{L}\times {\rm U}(1)_{Y}$ gauge invariance constraints in place. Along with these couplings, the CP-conserving couplings $\Delta\kappa_{\gamma}$, $\Delta g^{z}_{1}$, and $\lambda$ have been measured. All couplings were measured using a spin density matrix analysis.

The W-pair polarised cross-sections have been measured for the first time ever. These results along with the individual W polarised cross-sections and the measured values of the CP-violating TGCs have been published by the OPAL collaboration in [103].

In this chapter the evidence (or lack there of) for CP-violation is discussed. Then the measured values of all the TGCs are reviewed and a comparison to other measured values from both OPAL and other experiments is given. Finally conclusions on the measured W polarised fractions are drawn.