Supersymmetry and precision data after LEP2

Abstract

We study one loop supersymmetric corrections to precision observables. Adding LEP2 e ebar --> f fbar 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 Shat, That, W, Y `universal' parameters. SUSY corrections give W,Y > 0 and mainly depend on the left-handed slepton and squark masses, on M_2 and on mu.

16 pages

References in corpus (2)

• Electroweak symmetry breaking after LEP1 and LEP2
• Fermion pair production in e+e- collisions at 189-209 GeV and constraints on physics beyond the Standard Model

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