Probing mSUGRA Models at Linear Colliders

Abstract

A feasibility study of a 500-GeV linear collider is presented for mSUGRA models in co-annihilation region. We find an active mask is critical to suppress $e^{+}{e}^{-}\to e^{+}{e}^{-}{\tau }^{+}{\tau }^{-}$ events to probe the models.

Comments: 4 pages, latex, 1 figure, talk at International Workshop on Linear Colliders - Workshop on Physics and Experiments with Future Electron-Positron Linear Colliders (LCWS2002), Jeju Island, Korea, August 26-30, 2002; Table 3 is updated