Towards a dynamical determination of parameters in the Minimal Supersymmetric Standard Model

Abstract

In the Minimal Supersymmetric Standard Model (MSSM), the scale $M_{SUSY}$ of soft supersymmetry breaking is usually {\em assumed} to be of the order of the electroweak scale. We reconsider here the possibility of treating $M_{SUSY}$ as a dynamical variable. Its expectation value should be determined by minimizing the vacuum energy, after including MSSM quantum corrections. We point out the crucial role of the cosmological term for a dynamical generation of the desired hierarchies $m_Z,M_{SUSY}<<M_P$. Inspired by four-dimensional superstring models, we also consider the Yukawa couplings as dynamical variables. We find that the top Yukawa coupling is attracted close to its effective infrared fixed point, corresponding to a top-quark mass in the experimentally allowed range. As an illustrative example, we present the results of explicit calculations for a special case of the MSSM.

18 pages, 6 figures available upon request, (plain LATEX, to be run twice), CERN-TH.7185/94, LPTENS-94/08. (SHORTENED VERSION TO FIT PHYS. LETT. B FORMAT)

References in corpus (9)

• Model-Independent Analysis of Soft Terms in Effective Supergravity and in String Theory
• Dynamical supersymmetry breaking with a large internal dimension
• On the Unification of Couplings in the Minimal Supersymmetric Standard Model
• Phenomenological Implications of the $m_t$ RGE Fixed Point for SUSY Higgs Boson Searches
• Phenomenological Implications of the m_t RGE Fixed Point for SUSY Higgs Boson Searches
• The Bottom Mass Prediction in Supersymmetric Grand Unification; Uncertainties and Constraints
• Radiative Electroweak Symmetry Breaking and the Infrared Fixed Point of the Top Quark Mass
• Superstring Threshold Corrections to Yukawa Couplings
• Infrared Fixed Point Solution for the Top Quark Mass and Unification of Couplings in the MSSM

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