Chargino Pair Production at CERN LEP II

Charginos are expected to be the lightest observable supersymmetric particles in many of the supersymmetric models. In the scenario that lighter charginios are pair-produced at CERN LEP II, we present a straightforward procedure for determining the SUSY parameters, $\tan \beta$, $M_2$, $\mu$, and the electron sneutrino mass $m_{\tilde{\nu }}$ up to a four-fold discrete ambiguity, although a large number of unknown SUSY parameters are involved in chargino decays.