v 1 1 0 A ug 1 99 4 UH - 511 - 794 - 94 SEARCHING FOR SUPERSYMMETRY

After a lightning review of current bounds on the masses of supersymmetric particles, we describe strategies that may be helpful for extracting signals from the production of squarks, gluinos or top squarks, and from associated chargino-neutralino production at the Tevatron. We then briefly review SUSY signals at hadron and e + e − supercolliders. We discuss how various SUSY signals may be correlated within the supergravity framework and indicate the sense in which e + e − and hadron colliders may be complementary. Aesthetic issues aside, the interest in low energy SUSY phenomenology was originally driven by the recognition that SUSY can stablize the gauge hierarchy provided sparticles are lighter than O(1 TeV). More recently, the realization that the measured values of gauge couplings at LEP are in agreement with the minimal supersymmetric SU(5) model but incompatible with minimal non-supersymmetric GUTs has led several groups to reexamine the expectations for sparticle masses and mixing patterns within the theoretically appealing supergravity (SUGRA) framework, the phenomenology of which we will return to in the last section. Experimental constraints from flavour changing neutral currents can readily be accommodated and, assuming R-parity is unbroken, SUSY models include a viable candidate for dark matter. There is no direct evidence for sparticles in high energy collisions. This is not (yet) a cause for despair since, if we recall the original motivation for low