Supersymmetric Hints from Precision Electroweak Data?

Electroweak Precision Physics from Low to High Energies

Electroweak precision observables (EWPO) can give valuable information about the last unknown paramter of the Standard Model (SM), the Higgs-boson mass M H . EWPO can also restrict the parameter space of new physics models (NPM) such as the Minimal Supersymmetric Standard Model (MSSM). We review the respective constraints from the W boson mass, the effective leptonic mixing angle, the anomalous...

SNS-PH/00-03 hep-ph/0002128 LOOKING FOR Z ′ BOSONS IN SUPERSYMMETRIC E6 MODELS THROUGH ELECTROWEAK PRECISION DATA

Electroweak Precision Observables in the Minimal Supersymmetric Standard Model

The current status of electroweak precision observables in the Minimal Supersymmetric Standard Model (MSSM) is reviewed. We focus in particular on the W boson mass, M W , the effective leptonic weak mixing angle, sin 2 θ eff , the anomalous magnetic moment of the muon, (g − 2) µ , and the lightest CP-even MSSM Higgs boson mass, m h. We summarize the current experimental situation and the status...

Muon g − 2 and precision electroweak physics in the MSSM

The minimal supersymmetric extension of standard model (MSSM) is examined by analyzing its quantum effects on the precision electroweak measurements and the muon g − 2. We examine carefully the effects of light charginos and neutralinos that are found to improve the fit to the electroweak data. We identify two distinct regions on the (μ,M2)-plane that fit well to the electroweak data and give s...

Electroweak Precision Data and Gravitino Dark Matter

Electroweak precision measurements can provide indirect information about the possible scale of supersymmetry already at the present level of accuracy. We review present day sensitivities of precision data in mSUGRA-type models with the gravitino as the lightest supersymmetric particle (LSP). Theχ fit is based onMW , sin 2 θeff , (g−2)μ, BR(b → sγ) and the lightest MSSM Higgs boson mass, Mh. We...