How low can SUSY go? Matching, monojets and compressed spectra

Abstract

If supersymmetry (SUSY) has a compressed spectrum then the current mass limits from the LHC can be drastically reduced. We consider a possible 'worst case' scenario where the gluino and/or squarks are degenerate with the lightest SUSY particle (LSP). The most sensitive searches for these compressed spectra are via the final state LSPs recoiling against initial state radiation (ISR). Therefore it is vital that the ISR is understood and possible uncertainties in the predictions are evaluated. We use both MLM (with Pythia 6) and CKKW- L (with Pythia 8) matching and vary matching scales and parton shower properties to accurately determine the theoretical uncertainties in the kinematic distributions. All current LHC SUSY and monojet analyses are employed and we find the most constraining limits come from the CMS Razor and CMS monojet searches. For a scenario of squarks degenerate with the LSP and decoupled gluinos we find $M_{\tilde{q}}>340$ GeV. For gluinos degenerate with the LSP and decoupled squarks, $M_{\tilde{g}}>500$ GeV. For equal mass squarks and gluinos degenerate with the LSP, $M_{\tilde{q},\tilde{g}}>650$ GeV.

References added, version submitted to epl

References in corpus (9)

• PYTHIA 6.4 Physics and Manual
• Implications of CTEQ global analysis for collider observables
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Single-top hadroproduction in association with a W boson
• QCD radiation in the production of heavy colored particles at the LHC
• Searching for Directly Decaying Gluinos at the Tevatron
• Model-Independent Jets plus Missing Energy Searches
• Dijet Searches for Supersymmetry at the LHC
• Discovery reach for generic supersymmetry at the LHC: MT2 versus missing transverse momentum selections for pMSSM searches

Cited by in corpus (96)

• Naturalness and the Status of Supersymmetry
• Exploring new models in all detail with SARAH
• Constraining Dark Sectors at Colliders: Beyond the Effective Theory Approach
• Compressed electroweakino spectra at the LHC
• Unitarising Matrix Element + Parton Shower merging
• 2:1 for Naturalness at the LHC?
• Toward Full LHC Coverage of Natural Supersymmetry
• Searching for Dark Matter at the LHC with a Mono-Z
• NSUSY fits
• Contact Interactions Probe Effective Dark Matter Models at the LHC
• Majorana Dark Matter with a Coloured Mediator: Collider vs Direct and Indirect Searches
• Naturalness of the Non-Universal MSSM in the light of the recent Higgs results
• NMSSM with a singlino LSP: possible challenges for searches for supersymmetry at the LHC
• Internal bremsstrahlung signatures in light of direct dark matter searches
• Cornering electroweakinos at the LHC
• Automated Squark and Gluino Production to Next-to-Leading Order
• Scaling Patterns for QCD Jets
• The Electroweak Sector of the pMSSM in the Light of LHC - 8 TeV and Other Data
• Constraining Supersymmetry using the relic density and the Higgs boson
• Current LHC Constraints on Minimal Universal Extra Dimensions
• Exploring QCD uncertainties when setting limits on compressed SUSY spectra
• Natural SUSY's Last Hope: R-parity Violation via UDD Operators
• Electroweakino constraints from LHC data
• R-Parity Violation at the LHC
• Compressed SUSY at 14 TeV LHC
• Detecting light stop pairs in coannihilation scenarios at the LHC
• QCD threshold corrections for gluino pair production at hadron colliders
• Susy-QCD corrections to neutralino pair production in association with a jet
• Non-universal Gaugino mass models under the lamppost of muon (g-2)
• Neutralino dark matter confronted by the LHC constraints on Electroweak SUSY signals
• Mixing stops at the LHC
• Putting a Stop to di-Higgs Modifications
• 125 GeV Higgs as a pseudo-Goldstone boson in supersymmetry with vector-like matters
• LHC Missing-Transverse-Energy Constraints on Models with Universal Extra Dimensions
• `Stop' that ambulance! New physics at the LHC?
• Natural NMSSM confronting with the LHC7-8
• The heterotic MiniLandscape and the 126 GeV Higgs boson
• Complementarity of WIMP Sensitivity with direct SUSY, Monojet and Dark Matter Searches in the MSSM
• Probing U(1) extensions of the MSSM at the LHC Run I and in dark matter searches
• Mono-Higgs Signature in the Scotogenic Model with Majorana Dark Matter
• The ABC of RPV: Classification of R-Parity Violating Signatures at the LHC for Small Couplings
• Post LHC8 SUSY benchmark points for ILC physics
• Hidden SUSY from precision gauge unification
• A boost for the EW SUSY hunt: monojet-like search for compressed sleptons at LHC14 with 100 fb^-1
• A revisit to a compressed supersymmetric spectrum with 125 GeV Higgs
• Constraints on sneutrino dark matter from LHC Run 1
• Boosted Event Topologies from TeV Scale Light Quark Composite Partners
• Confronting the neutralino and chargino sector of the NMSSM to the multi-lepton searches at the LHC
• On the spin-dependent sensitivity of XENON100
• Automated third generation squark production to next-to-leading order
• The Supersymmetric Standard Models with a Pseudo-Dirac Gluino from Hybrid $F-$ and $D-$Term Supersymmetry Breakings
• Determination of the CMSSM Parameters using Neural Networks
• Light staus and enhanced Higgs diphoton rate with non-universal gaugino masses and SO(10) Yukawa unification
• Prospects for natural SUSY
• Current bounds and future prospects of light neutralino dark matter in NMSSM
• Robustness of dark matter constraints and interplay with collider searches for New Physics
• Compressed SUSY search at the 13 TeV LHC using kinematic correlations and structure of ISR jets
• Confronting SUSY models with LHC data via electroweakino production
• Current status of MSSM Higgs sector with LHC 13 TeV data
• Mirage Models Confront the LHC: I. Kahler-Stabilized Heterotic String Theory
• Studying the sensitivity of monotop probes to compressed supersymmetric scenarios at the LHC
• Degenerate SUSY search at the 8 TeV LHC
• Naughty or Nice? The Role of the `N' in the Natural NMSSM for the LHC
• Study of Baryonic R-Parity Violating MSSM Using Jet Substructure Technique at the 14 TeV LHC
• Monojet Searches for MSSM Simplified Models
• Full 1-loop calculation of BR$(B_{s,d}^0\to \ell \bar{\ell })$ in models beyond the MSSM with SARAH and SPheno
• The fate of the Littlest Higgs Model with T-parity under 13 TeV LHC Data
• Auto-Concealment of Supersymmetry in Extra Dimensions
• The case for 100 GeV bino dark matter: A dedicated LHC tri-lepton search
• Even tiers and resonances on the Real Projective Plane
• Gluino mass limits with sbottom NLSP in coannihilation scenarios
• Anapole Moment of Majorana Fermions and Implications for Direct Detection of Neutralino Dark Matter
• Probing the Electroweakino Sector of General Gauge Mediation at the LHC
• Indirect Searches of the Degenerate MSSM
• SUSY Higgs Mass and Collider Signals with a Hidden Valley
• LHC constraints on electroweakino dark matter revisited
• Closing in on compressed gluino-neutralino spectra at the LHC
• Monojet Signatures from Heavy Colored Particles: Future Collider Sensitivities and Theoretical Uncertainties
• Constrained Dirac gluino mediation
• SCYNet: Testing supersymmetric models at the LHC with neural networks
• Status and Implications of BSM Searches at the LHC
• Multi-hadron final states in RPV supersymmetric models with extra matters
• Monojet signatures from gluino and squark decays
• Inverse seesaw mechanism with compact supersymmetry: enhanced naturalness and light super-partners
• Enhanced Higgs Mass in Compact Supersymmetry
• Next-to-Leading Order Simulation of Slepton Pair Production
• Dark matter signals at the LHC: forecasts from ton-scale direct detection experiments
• SUSY after LHC8: a brief overview
• Exploring the Hadronic Axion Window via Delayed Neutralino Decay to Axinos at the LHC
• Dark matter in the KL moduli stabilization scenario with SUSY breaking sector from $\mathcal{N}=1$ SQCD
• Prospects of Gluino searches in multi-lepton channels in the light of ongoing LHC RUN-III
• Constraining Stealth SUSY with illuminated fat jets at the LHC
• Reinterpretation of ATLAS 8 TeV searches for Natural SUSY with a $R$-Sneutrino LSP
• Top squark signal significance enhancement by different Machine Learning Algorithms
• Revisiting the gluino mass limits in the pMSSM in the light of the latest LHC data and Dark Matter constraints
• Modified Supersymmetric Dark Sectors