Model dependence of the chargino mass bound from the CERN collider data

We examine the validity of the limit (${m}_{W\ifmmode \tilde{}\else \~{}\fi{}}$\ensuremath{\gtrsim}40 GeV) on the chargino mass that was inferred from the UA1 bound (${m}_{L}$\ensuremath{\ge}41 GeV) on the sequential heavy-lepton mass. This limit was obtained under the assumption that the supersymmetry-breaking gaugino masses are small (${m}_{g\ifmmode \tilde{}\else \~{}\fi{}}$\ensuremath{\lesssim}50 GeV) so that the lightest neutralino (Z${\ifmmode \tilde{}\else \~{}\fi{}}_{1}$) is dominantly a photino with ${m}_{\ensuremath{\gamma}\ifmmode \tilde{}\else \~{}\fi{}}$8 GeV. For larger gluino masses, we find that there is a substantial region of parameter space of the minimal supersymmetric model where ) is rather small so that ${m}_{W\ifmmode \tilde{}\else \~{}\fi{}}$ as small as 20--25 GeV is not excluded by the CERN collider data. Multilepton signals from gaugino decays are also commented upon.