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Constraining a CP-violating WWV coupling from the W^+W^- threshold cross section at LEP2
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Constraining a CP-violating WWV coupling from the W^+W^- threshold cross section at LEP2
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The most general form of the $WWZ$ and $WW\gamma$ interaction contains a $CP$-violating term which has the same threshold behaviour as the Standard Model $\ee \to \ww$ cross section. We calculate the cross section as a function of the corresponding anomalous coupling, and estimate the bounds which can be obtained from a measurement of the threshold cross section at LEP2. We show how the effect of the coupling is most pronounced in the angular distributions of the final-state fermions.
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