Phenomenology of a String-Inspired Supersymmetric Model with Inverted Scalar Mass Hierarchy

Abstract Supersymmetric (SUSY) models with heavy sfermions ( m f ∼10 TeV) in 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 naturalness constraints. We study the phenomenology of a string-inspired scenario and compare it with the minimal supergravity unified model (mSUGRA). The SUSY trilepton signature at the upgraded Tevatron, the b → sγ branching fraction and the neutralino dark matter relic density in this model can differ significantly from the mSUGRA model.