We study one loop supersymmetric corrections to precision observables. Adding LEP2 e (e) over bar -> f (f) over bar 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, (S) over cap, (T) over cap, 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. (c) 2005 Elsevier B.V. All rights reserved.
Supersymmetry and precision data after LEP2
STRUMIA, ALESSANDRO
2005-01-01
Abstract
We study one loop supersymmetric corrections to precision observables. Adding LEP2 e (e) over bar -> f (f) over bar 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, (S) over cap, (T) over cap, 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. (c) 2005 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
