Physics at LEP and Yukawa Coupling Unification

1995/10/18 by Carlos E. M. Wagner, C. E. M. Wagner, Wagner, C. E. M.
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9510341

9 pages, Latex, talk presented at the Conference SUSY95, Palaiseau, France, May 1995, to appear in the Proceedings

arxiv created 1995/10/18 · arxiv updated 2009/11/30

Abstract

We discuss the impact of the recent precision measurements at LEP on the minimal supersymmetric standard model. We show that the values of tanβ 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 space for the Higgs and sparticle searches at LEP2. Remarkably, it follows that the LEP measurements can provide information about the structure of soft supersymmetry breaking parameters at M_GUT. Finally, we briefly discuss the properties of a supersymmetric model with four generations, for which the fit to R_b naturally improves with respect to the one in the Standard Model.

Related

• Understanding SUSY limits from LEP
• Coupling Constant Unification and LEP Data
• Unification of Couplings and the Top Quark Sector in the Minimal Supersymmetric Standard Model
• Unification and low-energy supersymmetry at one and two-loop orders
• Complete Weak-Scale Threshold Corrections in the Minimal Supersymmetric Standard Model