Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-02-10
Nucl.Phys.B715:173-189,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages
Scientific paper
10.1016/j.nuclphysb.2005.03.001
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.
Marandella Guido
Schappacher Christian
Strumia Alessandro
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