2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46019Observables with optimised sensitivity to the $WWZ$ and $WWγ$-couplings in $e^+ e^- \to W^+ W^-$ are investigated. They allow for separate studies of CP violation and of absorptive parts in the amplitude. We have calculated expected statistical errors on extracted couplings at $\sqrt{s} = 500 GeV$, with unpolarised or longitudinally polarised beams.4 pages, Talk given at the Workshop on Physics with $e^+ e^-$ Linear Colliders, Gran Sasso, Italy, 2-3 June 1995, to appear in the proceedingsHigh Energy Physics - Phenomenologytext