Phenomenology of a string-inspired supersymmetric model with inverted scalar mass hierarchy

Supersymmetric (SUSY) models with heavy sfermions (m(f)similar to 10 TeV) i n the first two generations and the third generation sfermion masses below 1 TeV can solve the SUSY flavor and the CP problems as well as satisfy natu ralness constraints. We study the phenomenology of a string-inspired scenar io and compare it with the minimal supergravity unified model (mSUGRA). The SUSY trilepton signature at the upgraded Tevatron, the b-->s gamma branchi ng fraction and the neutralino dark matter relic density in this model can differ significantly from the mSUGRA model. (C) 2000 Elsevier Science B.V. All rights reserved.