Supersymmetry and precision data after LEP2
高能物理 - 唯象学
2009-10-09 v1
摘要
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.
引用
@article{arxiv.hep-ph/0502095,
title = {Supersymmetry and precision data after LEP2},
author = {Guido Marandella and Christian Schappacher and Alessandro Strumia},
journal= {arXiv preprint arXiv:hep-ph/0502095},
year = {2009}
}
备注
16 pages