Bottom-up approach to B-parameter in minimal supersymmetric standard model
نویسندگان
چکیده
We study μ and B-parameters in the minimal supersymmetric standard model (MSSM) based on the radiative electroweak symmetry breaking scenario using “bottom-up” approach and show how useful our approach is to select a phenomenologically viable model beyond the MSSM under the assumption that the underlying theory is a string model or a gauge-Yukawa unified gauge model. e-mail: [email protected], Humboldt Fellow e-mail: [email protected] e-mail: [email protected]
منابع مشابه
Testing Unified Supersymmetric Models
I define the Standard Supersymmetric Model (SSM) as the minimal supersymmetric extension of the Standard Model with gauge coupling unification and universal soft supersymmetry breaking at the unification scale. This well-defined model has a five-dimensional space of unknown parameters (m t , tan β, m 1/2 , m 0 , A). I outline the top-down and bottom-up methods of solving this model. Thresholds ...
متن کاملO ct 1 99 5 CERN - TH / 95 - 261 Physics at LEP and Yukawa Coupling Unification
We discuss the impact of the recent precision measurements at LEP on the minimal supersymmetric standard model. We show that the values of tan β necessary to induce large positive corrections to R b are the same as the ones preferred by the unification of the bottom and τ Yukawa couplings in the MSSM for the current measured value of M t. We discuss the relevance of the preferred parameter spac...
متن کاملQCD Corrections to Electroweak Precision Observables in SUSY Theories
The two-loop QCD corrections to the ρ parameter are derived in the Minimal Supersymmetric Standard Model. They turn out to be sizable and modify the one-loop result by up to 30%. Furthermore exact results for the gluonic corrections to ∆r are presented and compared with the leading contribution entering via the ρ parameter. 1 Contribution to the proceedings of the International Europhysics Conf...
متن کاملSquark Contributions to Higgs Boson Masses in the Next–to–Minimal Supersymmetric Standard Model
Within the context of an effective potential formalism we calculate the contribution to Higgs boson masses in the next–to–minimal supersymmetric standard model from squark loops. We then supplement a previously performed renormalisation group analysis of the Higgs sector of this model with these results in order to determine the shift in the bound on the lightest CP-even Higgs boson mass as a r...
متن کاملSupersymmetric Electroweak Corrections to W±H∓ Associated Production at the CERN Large Hadron Collider
The O(αewm 2 t(b)/m 2 W ) and O(αewm 4 t(b)/m 4 W ) supersymmetric electroweak corrections to the cross section for WH associated production at the LHC are calculated in the minimal supersymmetric standard model. Those corrections arise from the quantum effects which are induced by the Yukawa couplings from the Higgs sector and the chargino-top(bottom)-sbottom(stop) couplings, neutralinotop(bot...
متن کامل