Simplified Models for Exotic BSM Searches

Abstract

Simplified models are a successful way of interpreting current LHC searches for models beyond the standard model (BSM). So far simplified models have focused on topologies featuring a missing transverse energy (MET) signature. However, in some BSM theories other, more exotic, signatures occur. If a charged particle becomes long-lived on collider time scales - as it is the case in parts of the SUSY parameter space - it leads to a very distinct signature. We present an extension of the computer package SModelS which includes simplified models for heavy stable charged particles (HSCP). As a physical application we investigate the CMSSM stau co-annihilation strip containing long-lived staus, which presents a potential solution to the Lithium problem. Applying both MET and HSCP constraints we show that, for low values of $\tan \beta$, all this region of parameter space either violates Dark Matter constraints or is excluded by LHC searches.

19 pages + references, 9 figures; v3: Minor corrections in the text; matches published version

References in corpus (22)

• PYTHIA 6.4 Physics and Manual
• Big Bang Nucleosynthesis: 2015
• Threshold resummation for squark-antisquark and gluino-pair production at the LHC
• Simplified Models for a First Characterization of New Physics at the LHC
• Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC
• A Bitter Pill: The Primordial Lithium Problem Worsens
• Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using $\sqrt{s}=8$ TeV proton--proton collision data
• Particle physics catalysis of thermal Big Bang Nucleosynthesis
• Bound-State Effects on Light-Element Abundances in Gravitino Dark Matter Scenarios
• Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at $\sqrt{s}$ = 8 TeV
• The cosmic 6Li and 7Li problems and BBN with long-lived charged massive particles
• Searches for supersymmetry using the MT2 variable in hadronic events produced in pp collisions at 8 TeV
• Possible solution to the ${}^7$Li problem by the long lived stau
• The End of the CMSSM Coannihilation Strip is Nigh
• New Nuclear Physics for Big Bang Nucleosynthesis
• A Simultaneous Solution to the ^6Li and ^7Li Big Bang Nucleosynthesis Problems from a Long-Lived Negatively-Charged Leptonic Particle
• Constraints on the pMSSM, AMSB model and on other models from the search for long-lived charged particles in proton-proton collisions at sqrt(s) = 8 TeV
• Big-bang nucleosynthesis and the relic abundance of dark matter in a stau-neutralino coannihilation scenario
• Revised Big Bang Nucleosynthesis with long-lived negatively charged massive particles: updated recombination rates, primordial 9Be nucleosynthesis, and impact of new 6Li limits
• Closing in on the Tip of the CMSSM Stau Coannihilation Strip
• SModelS v1.0: a short user guide
• Long-lived staus from strong production in a simplified model approach

Cited by in corpus (15)

• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• Coannihilation without chemical equilibrium
• A global fit of the MSSM with GAMBIT
• SModelS v1.2: long-lived particles, combination of signal regions, and other novelties
• SModelS v1.1 user manual
• Reinterpretation of LHC Results for New Physics: Status and Recommendations after Run 2
• Constraining new physics with searches for long-lived particles: Implementation into SModelS
• Collider limits on new physics within micrOMEGAs4.3
• Signatures of sneutrino dark matter in an extension of the CMSSM
• On the coverage of the pMSSM by simplified model results
• Heavy stable charged tracks as signatures of non-thermal dark matter at the LHC : a study in some non-supersymmetric scenarios
• Likelihood Analysis of Supersymmetric SU(5) GUTs
• t-channel dark matter at the LHC -- a whitepaper
• Trilinear-Augmented Gaugino Mediation
• Gauge Mediation at LHC: status and prospects