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The post-Higgs MSSM scenario: habemus MSSM?

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The Minimal Supersymmetric Standard Model (MSSM) with a 125 GeV Higgs boson is analyzed. This high SUSY-breaking scale simplifies the Higgs sector, allowing its properties to be described by mass and three key couplings, consistent with LHC data.

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Area of Science:

  • High Energy Physics
  • Supersymmetry
  • Standard Model

Background:

  • Discovery of the Higgs boson at the LHC implies a high SUSY-breaking scale (M > 1 TeV).
  • The Minimal Supersymmetric extension of the Standard Model (MSSM) must accommodate this observation.

Purpose of the Study:

  • Analyze the hMSSM after the Higgs boson discovery.
  • Determine the key parameters describing the Higgs sector in this scenario.
  • Fit the lighter Higgs boson couplings with current LHC data.

Main Methods:

  • Demonstrate how the Higgs boson mass fixes dominant radiative corrections.
  • Analyze direct supersymmetric radiative corrections.
  • Fit Higgs couplings using LHC production and decay rates.
  • Incorporate limits from searches for heavier Higgs bosons (H, A, H±).

Main Results:

  • The Higgs sector in hMSSM can be approximated by two free parameters due to radiative corrections.
  • Lighter Higgs boson phenomenology is well-described by its mass and three couplings (to gauge bosons, top, and bottom quarks).
  • Fit results are consistent with current LHC data and searches for heavier Higgs states.

Conclusions:

  • The hMSSM with a 125 GeV Higgs boson is constrained by LHC data.
  • The lighter Higgs boson's properties are largely determined by its mass and three fundamental couplings.
  • Further precision measurements can refine our understanding of electroweak symmetry breaking.