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Supersoft Top Squarks.

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New "lumberjack" fields in supersymmetric theories screen UV-sensitive logarithms, leading to finite Higgs mass corrections. This significantly reduces fine-tuning, potentially resolving the naturalness crisis for high-scale supersymmetry.

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Area of Science:

  • High-energy physics
  • Supersymmetry
  • Particle physics

Background:

  • Supersymmetric theories allow calculable IR contributions to Higgs mass below the UV mediation scale.
  • Logarithmic sensitivity to high-energy physics (UV) remains a challenge.
  • Fine-tuning in high-scale supersymmetry is a significant concern.

Purpose of the Study:

  • To develop a framework that supersoftens logarithmic sensitivity to UV physics in the Higgs mass.
  • To introduce a model with finite, IR-calculable corrections to the Higgs mass.
  • To investigate the impact on fine-tuning and interpretations of naturalness in supersymmetry.

Main Methods:

  • Introducing new fields, termed "lumberjacks", within a symmetry-dictated framework.
  • Screening UV-sensitive logarithms originating from the matter sector.
  • Calculating Higgs mass corrections in the presence of these new fields.

Main Results:

  • A novel model with finite, IR-calculable corrections to the Higgs mass is presented.
  • The introduction of "lumberjack" fields effectively screens problematic UV-sensitive logarithms.
  • Fine-tuning is reduced by over an order of magnitude for high-scale supersymmetry.

Conclusions:

  • The proposed framework offers a solution to the logarithmic sensitivity problem in supersymmetric Higgs mass calculations.
  • These models significantly reduce fine-tuning, challenging the notion of a naturalness crisis in high-scale supersymmetry.
  • The findings suggest a potentially natural parameter space for high-scale supersymmetry.