Bounds on Supersymmetry from Electroweak Precision Analysis

Abstract

The Standard Model global fit to precision data is excellent. The Minimal Supersymmetric Standard Model can also fit the data well, though not as well as the Standard Model. At best, supersymmetric contributions either decouple or only slightly decrease the total chi^2, at the expense of decreasing the number of degrees of freedom. In general, regions of parameter space with large supersymmetric corrections from light superpartners are associated with poor fits to the data. We contrast results of a simple (oblique) approximation with full one-loop results, and show that for the most important observables the non-oblique corrections can be larger than the oblique corrections, and must be taken into account. We elucidate the regions of parameter space in both gravity- and gauge-mediated models which are excluded. Significant regions of parameter space are excluded, especially with positive supersymmetric mass parameter mu. We give a complete listing of the bounds on all the superpartner and Higgs boson masses. For either sign of mu, and for all supersymmetric models considered, we set a lower limit on the mass of the lightest CP-even Higgs scalar, mh > 78 GeV. Also, the first and second generation squark masses are constrained to be above 280 (325) GeV in the supergravity (gauge-mediated) model.

32 pages, 12 figures; SLAC-PUB number changed

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• Electroweak Model and Constraints on New Physics
• Gauge-mediated SUSY Breaking at an Intermediate Scale
• A Measurement of the W Boson Mass
• Search for pair-production of long-lived heavy charged particles in e+e- annihilation
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Cited by in corpus (43)

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• Next-to-Leading QCD Corrections to B\to X_s γin Supersymmetry
• CP Violation in Top Physics
• Mass Bounds on a Very Light Neutralino
• Low Energy Precision Test of Supersymmetry
• epsilon'/epsilon and Rare K and B Decays in the MSSM
• QCD Corrections to B -> X_{d,s} nu nubar, B_{d,s} -> l^+l^-, K -> pi nu nubar and K_L -> mu^+ mu^- in the MSSM
• B, D and K decays
• Neutralino relic density in a Universe with a non-vanishing cosmological constant
• Indirect Sensitivities to the Scale of Supersymmetry
• Renormalization of the Minimal Supersymmetric Standard Model
• Prediction for the Lightest Higgs Boson Mass in the CMSSM using Indirect Experimental Constraints
• The MSSM confronts the precision electroweak data and the muon g-2
• Forward-backward and isospin asymmetry for B -> K* l+ l- decay in the standard model and in supersymmetry
• Chiral Models of Weak Scale Supersymmetry
• Supersymmetry versus precision experiments revisited
• Supersymmetry Reach of the Tevatron via Trilepton, Like-Sign Dilepton and Dilepton plus Tau Jet Signatures
• Unanswered Questions in the Electroweak Theory
• Stop and Sbottom Searches in Run II of the Fermilab Tevatron
• Constraining SUSY models with Fittino using measurements before, with and beyond the LHC
• Parity Violating Asymmetries in Top Pair Production at Hadron Colliders
• Virtual effects of light gauginos and higgsinos: a precision electroweak analysis of split supersymmetry
• Theory of Z boson decays
• Low-Energy Limits of Theories With Two Supersymmetries
• A combined study of $b\to s\gamma$ and the muon anomalous magnetic moment in gauge-mediated supersymmetry breaking models
• Probing Supersymmetry with Parity-Violating Electron Scattering
• Parity-Violating Electron Scattering as a Probe of Supersymmetry
• Charged Current Universality in the MSSM
• Determining $\tan \beta$ with Neutral and Charged Higgs Bosons at a Future $e^{+}{e}^{-}$ Linear Collider
• Associated Higgs Production in the MSSM
• Highlights of the SLD Physics Program at the SLAC Linear Collider
• $\tan \beta$ Determination From Heavy Higgs Boson Production at Linear Colliders
• Supersymmetric Effects in Deep Inelastic Neutrino-Nucleus Scattering
• Determining the Structure of Supersymmetry-Breaking with Renormalization Group Invariants
• Charged Current Universality and the MSSM
• Supersymmetric Effects in Parity-Violating Deep Inelastic Electron-Nucleus Scattering
• Physics Implications of Precision Electroweak Experiments
• e+e- --> nu nu-bar A in the two-Higgs-doublet model
• Enhanced electroweak radiative corrections in SUSY and precision data
• Gluino-Mediated Rare B Decays
• Techniques for the Top Squark Search at the Fermilab Tevatron