Abstract
Much current theoretical analysis is based on the hypothesis that the physics beyond the Standard Model is a consequence of new principles that occur at the Planck scale. The question arises whether such principles can ever be directly tested. We show here that for a significant class of models, hypotheses at the string or Planck scale can indeed be directly tested to relatively high precision by linear colliders. Three classes of models are examined: those with universal SUSY soft breaking at the string scale; those with a horizontal symmetry at the string or Planck scale, and simple Calabi-Yau superstring models with dilaton and moduli SUSY breaking.KeywordsGauge GroupSUSY BreakingPlanck ScaleRenormalization Group EquationLinear ColliderThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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