Abstract
After the supersymmetric particles have been discovered, the priority will be to determine independently the fundamental parameters to reveal the structure of the underlying supersymmetric theory. In my talk I discuss how the chargino sector can be reconstructed completely by measuring the cross-sections with polarized beams at e + e − collider experiments: e + e − → \(\tilde \chi _i^ + \tilde \chi _j^\_ \) [i, j=1, 2]. The closure of the two-chargino system can be investigated by analysing sum rules for the production cross-sections.
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