Exploring QCD uncertainties when setting limits on compressed SUSY spectra

Abstract

If Supersymmetry (SUSY) has a compressed spectrum the current limits from the LHC can be drastically reduced. We take possible `worst case' scenarios where combinations of the stop, squark and gluino masses are degenerate with the mass of the lightest SUSY particle. To accurately derive limits in the model, care must be taken when describing QCD radiation and we examine this in detail. Lower mass bounds are then produced by considering all the 7 TeV hadronic SUSY and monojet searches. The evolution of the limits as the mass splitting is varied is also presented.

18 pages, 16 figures, 2 Tables

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• Light Stop Decay in the MSSM with Minimal Flavour Violation
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• Detecting light stop pairs in coannihilation scenarios at the LHC
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• Current LHC Constraints on Minimal Universal Extra Dimensions
• Very Light Scalar Top Quarks at the LHC
• Fox-Wolfram Moments in Higgs Physics
• Compressed SUSY at 14 TeV LHC
• Detecting light stop pairs in coannihilation scenarios at the LHC
• Susy-QCD corrections to neutralino pair production in association with a jet
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• Neutralino dark matter confronted by the LHC constraints on Electroweak SUSY signals
• Probing Dark Matter with Disappearing Tracks at the LHC
• Revisiting the Exclusion Limits from Direct Chargino-Neutralino Production at the LHC
• Non-Decoupling MSSM Higgs Sector and Light Superpartners
• The heterotic MiniLandscape and the 126 GeV Higgs boson
• Complementarity of WIMP Sensitivity with direct SUSY, Monojet and Dark Matter Searches in the MSSM
• Boosted Event Topologies from TeV Scale Light Quark Composite Partners
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• Confronting the neutralino and chargino sector of the NMSSM to the multi-lepton searches at the LHC
• Determination of the CMSSM Parameters using Neural Networks
• Prospects for natural SUSY
• Robustness of dark matter constraints and interplay with collider searches for New Physics
• Studying the sensitivity of monotop probes to compressed supersymmetric scenarios at the LHC
• Search for a compressed supersymmetric spectrum with a light Gravitino
• Full 1-loop calculation of BR$(B_{s,d}^0\to \ell \bar{\ell })$ in models beyond the MSSM with SARAH and SPheno
• Monojet Searches for MSSM Simplified Models
• Naughty or Nice? The Role of the `N' in the Natural NMSSM for the LHC
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• Demystifying the compressed top squark region with kinematic variables
• Probing the Electroweakino Sector of General Gauge Mediation at the LHC
• Indirect Searches of the Degenerate MSSM
• Boosted jet techniques for a supersymmetric scenario with gravitino LSP
• Monojet Signatures from Heavy Colored Particles: Future Collider Sensitivities and Theoretical Uncertainties
• Closing in on compressed gluino-neutralino spectra at the LHC
• SCYNet: Testing supersymmetric models at the LHC with neural networks
• Status and Implications of BSM Searches at the LHC
• Inverse seesaw mechanism with compact supersymmetry: enhanced naturalness and light super-partners
• Enhanced Higgs Mass in Compact Supersymmetry