Supersymmetry and precision data after LEP2 Original Research Article

We study one loop supersymmetric corrections to precision observables. Adding LEP2 image cross sections to the data-set removes previous hints for SUSY and the resulting constraints are in some cases stronger than direct bounds on sparticle masses. We consider specific models: split SUSY, CMSSM, gauge mediation, anomaly and radion mediation. Beyond performing a complete one-loop analysis, we also develop a simple approximation, based on the image ‘universal’ parameters. SUSY corrections give image and mainly depend on the left-handed slepton and squark masses, on image and on μ.