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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
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The post-Higgs MSSM scenario: habemus MSSM?
A Djouadi1, L Maiani2, G Moreau1
1Laboratoire de Physique Théorique, Université Paris-Sud and CNRS, 91405 Orsay, France.
The European Physical Journal. C, Particles and Fields
|March 28, 2015
Summary
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.
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.
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