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Updated: Jan 22, 2026
07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
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On the coverage of the pMSSM by simplified model results
Federico Ambrogi1, Sabine Kraml2, Suchita Kulkarni1
11Institut für Hochenergiephysik, Österreichische Akademie der Wissenschaften, Nikolsdorfer Gasse 18, 1050 Vienna, Austria.
The European Physical Journal. C, Particles and Fields
|July 2, 2019
Summary
Simplified models from ATLAS and CMS searches do not fully cover realistic scenarios in the phenomenological Minimal Supersymmetric Standard Model (pMSSM). New topologies, like those with asymmetric branches, are needed to improve constraints.
Area of Science:
- High Energy Physics
- Particle Physics
- Supersymmetry Searches
Background:
- Supersymmetry (SUSY) searches by ATLAS and CMS experiments are often interpreted using simplified models.
- Simplified models provide a limited view of the complex parameter space of full SUSY models.
Purpose of the Study:
- To assess the coverage of realistic SUSY scenarios by current simplified model constraints.
- To identify gaps in simplified model interpretations for the phenomenological MSSM (pMSSM).
Main Methods:
- Comparison of constraints from SModelS v1.1.1 using simplified models with ATLAS pMSSM study results (arXiv:1508.06608).
- Analysis of the phenomenological MSSM (pMSSM) with 19 free parameters.
Main Results:
- Approximately 40-45% of points excluded by ATLAS pMSSM analysis are not covered by current simplified model constraints.
- Identified key untested topologies, including those with asymmetric branches and 3-jet signatures from gluino-squark production.
Conclusions:
- Current simplified model constraints offer incomplete coverage of the pMSSM parameter space.
- Incorporating topologies with asymmetric branches and specific decay chains (e.g., via heavier neutralinos/charginos) is crucial for enhancing SUSY search sensitivity.
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