Detecting a light gravitino at a linear collider to probe the SUSY-breaking scale

If supersymmetry is dynamically broken at a low scale (MSUSY), within a few orders of magnitude of the weak scale, then the lightest supersymmetric partner is the gravitino and the next-to-lightest supersymmetric partner is a neutralino χ01 with mass mχ01, which can decay into a photon (γ) plus a gravitino (G). We study the detection of e-e+→χ01χ01→γGγG at the proposed Linear Collider, and find the range of the parameters MSUSY and mχ01 that can be accessible with a right-hand polarized electron beam at √S=500 GeV, with 50 fb-1 integrated luminosity. We also discuss briefly the accessible range for current electron and hadron colliders. copyright 1996 The American Physical Society