Gluino NLSP, Dark Matter via Gluino Coannihilation, and LHC Signatures

Abstract

The possibility that the gluino is the next to the lightest supersymmetric particle (NLSP) is discussed and it is shown that this situation arises in nonuniversal SUGRA models within a significant part of the parameter space compatible with all known experimental bounds. It is then shown that the gluino NLSP (GNLSP) models lead to a compressed sfermion spectrum with the sleptons often heavier than the squarks at least for the first two generations. The relic density here is governed by gluino coannihilation which is responsible for a relatively small mass splitting between the gluino and the neutralino masses. Thus the GNLSP class of models is very predictive first because the SUSY production cross sections at the LHC are dominated by gluino production and second because the gluino production itself proceeds dominantly through a single channel which allows for a direct determination of the gluino mass and an indirect determination of the neutralino mass due to a linear relation between these two masses which is highly constrained by coannihilation. A detailed analysis of these models shows that the jet production and tagged b-jets from the gluino production can be discriminated from the standard model background with appropriate cuts. It is found that the GNLSP models can be tested with just 10 fb${}^{-1}$ of integrated luminosity and may therefore be checked with low luminosity runs in the first data at the LHC. Thus if a GNLSP model is realized, the LHC will turn into a gluino factory through a profuse production of gluinos with typically only a small fraction $\lesssim 5$ of total SUSY events arising from other production modes over the allowed GNLSP model parameter space.

33 pages, 8 figures, accepted for publication in Physical Review D

References in corpus (29)

• PYTHIA 6.4 Physics and Manual
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Observation of an anomalous positron abundance in the cosmic radiation
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• QCD radiation in the production of heavy colored particles at the LHC
• Averages of b-hadron and c-hadron Properties at the End of 2007
• Results from the First Science Run of the ZEPLIN-III Dark Matter Search Experiment
• Searching for Directly Decaying Gluinos at the Tevatron
• Model-Independent Jets plus Missing Energy Searches
• TeV gamma-rays and the largest masses and annihilation cross sections of neutralino dark matter
• Search for squarks and gluinos in events with jets and missing transverse energy using 2.1 fb-1 of ppbar collision data at sqrt(s)=1.96 TeV
• Compressed supersymmetry and natural neutralino dark matter from top squark-mediated annihilation to top quarks
• Non-universal gaugino masses from non-singlet F-terms in non-minimal unified models
• It's a Gluino!
• The Landscape of Sparticle Mass Hierarchies and Their Signature Space at the LHC
• Yukawa Unification and Neutralino Dark Matter in SU(4)_c \times SU(2)_L \times SU(2)_R
• Precision gluino mass at the LHC in SUSY models with decoupled scalars
• Gluino Annihilations and Neutralino Dark Matter
• Determining the Dark Matter Relic Density in the Minimal Supergravity Stau-Neutralino Coannihilation Region at the Large Hadron Collider
• Light Higgses at the Tevatron and at the LHC and Observable Dark Matter in SUGRA and D Branes
• Mixed Neutralino Dark Matter in Nonuniversal Gaugino Mass Models
• Heavy-flavour tagging and the supersymmetry reach of the CERN Large Hadron Collider
• Identifying Multi-Top Events from Gluino Decay at the LHC
• Non-universal gaugino and scalar masses, hadronically quiet trileptons and the Large Hadron Collider
• Decoding the Mechanism for the Origin of Dark Matter in the Early Universe Using LHC Data
• Twenty Years of SUGRA
• Lepton Flavours at the Early LHC Experiments as the Footprints of the Dark Matter Producing Mechanisms

Cited by in corpus (65)

• Neutralino Dark Matter at 14 and 100 TeV
• The Hunt for New Physics at the Large Hadron Collider
• Naturalness, Supersymmetry and Implications for LHC and Dark Matter
• The Case for an EeV Gravitino
• Multicomponent Dark Matter in Supersymmetric Hidden Sector Extensions
• Gluino-driven Radiative Breaking, Higgs Boson Mass, Muon $\mathbf{g}-2$, and the Higgs Diphoton Decay in SUGRA Unification
• Where the Sidewalk Ends: Jets and Missing Energy Search Strategies for the 7 TeV LHC
• Higgs Boson Mass from t-b-tau Yukawa Unification
• Higgs Boson Mass, Proton Decay, Naturalness and Constraints of LHC and Planck Data
• Higgs and Sparticle Spectroscopy with Gauge-Yukawa Unification
• Scenarios for Gluino Coannihilation
• Reduced LHC constraints for higgsino-like heavier electroweakinos
• t-b-tau Yukawa unification for mu < 0 with a sub-TeV sparticle spectrum
• Gaugino coannihilations
• Explaining PAMELA and WMAP data through Coannihilations in Extended SUGRA with Collider Implications
• Low Mass Gluino within the Sparticle Landscape, Implications for Dark Matter, and Early Discovery Prospects at LHC-7
• Interpreting the First CMS and ATLAS SUSY Results
• NLSP Gluino and NLSP Stop Scenarios from b-tau Yukawa Unification
• What Fermilab $(g-2{)}_{\mu }$ experiment tells us about discovering SUSY at HL-LHC and HE-LHC
• Coannihilation Scenarios and Particle Spectroscopy in SU(4)_c x SU(2)_L x SU(2)_R
• Dark Matter as a Guide Toward a Light Gluino at the LHC
• Stop Coannihilation in the CMSSM and SubGUT Models
• Sparticle mass spectra from SU(5) SUSY GUT models with $b-\tau$ Yukawa coupling unification
• SUSY Discovery Potential and Benchmarks for Early Runs at $\sqrt{s}=7$ TeV at the LHC
• Prospects for Higgs- and Z-resonant Neutralino Dark Matter
• Solving the muon g-2 anomaly in CMSSM extension with non-universal gaugino masses
• SO(10) Yukawa Unification with mu < 0
• Generalizing Minimal Supergravity
• Universality in Pure Gravity Mediation with Vector Multiplets
• SUSY and Higgs Signatures Implied by Cancellations in $b\to s\gamma$
• Likelihood Analysis of the Sub-GUT MSSM in Light of LHC 13-TeV Data
• 125 GeV Higgs Boson from t-b-tau Yukawa Unification
• Implications of 98 GeV and 125 GeV Higgs scenario in non-decoupling SUSY with updated ATLAS, CMS and PLANCK data
• Sparticle Spectroscopy with Neutralino Dark matter from t-b-tau Quasi-Yukawa Unification
• Connecting the Direct Detection of Dark Matter with Observation of Sparticles at the LHC
• Non-universal scalar mass scenario with Higgs funnel region of SUSY dark matter: a signal-based analysis for the Large Hadron Collider
• A Minimal SU(5) SuperGUT in Pure Gravity Mediation
• LHC Constraints on NLSP Gluino and Dark Matter Neutralino in Yukawa Unified Models
• Excess Observed in CDF $B_s^0\to {\mu }^{+}{\mu }^{-}$ and SUSY at the LHC
• Gluino Coannihilation and Observability of Gluinos at LHC RUN II
• Searching for NLSP Sbottom at the LHC
• Implication of Higgs at 125 GeV within Stochastic Superspace Framework
• Supersymmetry Breaking Scalar Masses and Trilinear Soft Terms From High-Dimensional Operators in E_6 SUSY GUT
• Supergravity Models with 50-100 TeV Scalars, SUSY Discovery at the LHC and Gravitino Decay Constraints
• On the coverage of neutralino dark matter in coannihilations at the upgraded LHC
• Neutralino-Sbottom Coannihilation in SU(5)
• Searching for Metastable Particles with Sub-Millimeter Displaced Vertices at Hadron Colliders
• A long-lived stop with freeze-in and freeze-out dark matter in the hidden sector
• Testing Yukawa Unification at LHC Run-3 and HL-LHC
• Probing EWSB Naturalness in Unified SUSY Models with Dark Matter
• Dark Matter, Sparticle Spectroscopy and Muon $(g-2)$ in $SU(4{)}_c\times SU(2{)}_L\times SU(2{)}_R$
• Realistic Standard Model Fermion Mass Relations in Generalized Minimal Supergravity (GmSUGRA)
• Superparticle Signatures: from PAMELA to the LHC
• A decaying neutralino as dark matter and its gamma ray spectrum
• Closing in on compressed gluino-neutralino spectra at the LHC
• Tests of gluino-driven radiative breaking of the electroweak symmetry at the LHC
• LHC Run-3, $b-\tau$ Yukawa Unification and Dark Matter Implications in SUSY 4-2-2 model
• Probing Bino-Gluino Coannihilation at the LHC
• High Energy Physics and Cosmology at the Unification Frontier: Opportunities and Challenges in the coming years
• Extending the Reach of Compressed Gluinos at the LHC
• Supersymmetry after the Higgs
• A Stronger Case for Superunification Post Higgs Boson Discovery
• Decoding the Origin of Dark Matter
• Revisiting the gluino mass limits in the pMSSM in the light of the latest LHC data and Dark Matter constraints
• Probing gaugino coannihilation with displaced vertex searches