1991/09/27 by Luis E. Ibáñez, Luis Ibanez, Dieter Lüst +3 · 3 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Compactification (mathematics) #Coupling constant #Electron #Higgs boson #Lepton #Mathematical physics #Mathematics #Minimal Supersymmetric Standard Model #Moduli #Particle physics #Particle physics theoretical and experimental studies #Physics #Pure mathematics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #String (physics) #Superstring theory #Supersymmetry #hep-th
paper · pdf · doi:10.1016/0370-2693(91)91828-j
published as Phys.Lett.B272:251-260,1991 · 20 pages
arxiv created 1991/09/27 · openalex publication_date 1991/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the evolution of the gauge coupling constants in string unification schemes in which the light spectrum below the compactification scale is exactly that of the minimal supersymmetric standard model. In the absence of string threshold corrections the predicted values sin2θW=0.218 and αs=0.20 are in gross conflict with experiment, but these corrections are generically important. One can express the string threshold corrections to sin2θW and αs in terms of certain modular weights of quark, lepton and Higgs superfields as well as the moduli of the string model. We find that in order to get agreement with the experimental measurements within the context of this minimal scheme, certain constraints on the modular weights of the quark, lepton and Higgs superfields should be obeyed. Our analysis indicates that this minimal string unification