Non-zero trilinear parameter in the mSUGRA model - dark matter and collider signals at Tevatron and LHC

Abstract

Phenomenologically viable and interesting regions of parameter space in the minimal super-gravity (mSUGRA) model with small $m_0$ and small $m_{1/2}$ consistent with the WMAP data on dark matter relic density and the bound on the mass of the lightest Higgs scalar $m_h>$ 114 GeV from LEP2 open up if the rather adhoc assumption $A_0$=0, where $A_0$ is the common trilinear soft breaking parameter, employed in most of the existing analyses is relaxed. Since this region corresponds to relatively light squarks and gluinos which are likely to be probed extensively in the very early stages of the LHC experiments, the consequences of moderate or large negative values of $A_0$ are examined in detail. We find that in this region several processes including lightest supersymmetric particle (LSP) pair annihilation, LSP - lighter tau slepton (${\tilde{\tau }}_1$) coannihilation and LSP - lighter top squark (${\tilde{t}}_1$) coannihilation contribute to the observed dark matter relic density. %\sout{The possibility that a relic density producing ${\tilde{t}}_1$ can be %observed at the current experiments at the Tevatron is wide open.} The possibility that a ${\tilde{t}}_1$ that can participate in coannihilation with the lightest neutralino to satisfy the WMAP bound on relic density and at the same time be observed at the current experiments at the Tevatron is wide open. At the LHC a large number of squark - gluino events lead to a very distinctive semi-inclusive signature ${\tau }^{\pm }$+X${}_{\tau }$ (anything without a tau lepton) with a characteristic size much larger than $e^{\pm }$+X${}_e$ or ${\mu }^{\pm }$+X${}_{\mu }$ events.

Some minor changes made in the text. To appear in Phys Rev D

References in corpus (70)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• High-Energy-Physics Event Generation with PYTHIA 6.1
• Search for the Standard Model Higgs Boson at LEP
• Towards High-Precision Predictions for the MSSM Higgs Sector
• SuSpect: a Fortran Code for the Supersymmetric and Higgs Particle Spectrum in the MSSM
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Neutralino Relic Density including Coannihilations
• Two-Loop Renormalization Group Equations for Soft Supersymmetry-Breaking Couplings
• The Neutralino Relic Density in Minimal N=1 Supergravity
• Multi-TeV Scalars are Natural in Minimal Supergravity
• Focus Points and Naturalness in Supersymmetry
• Higgs Boson Theory and Phenomenology
• Branching Fraction and Photon Energy Spectrum b -> s gamma
• Naturalness, Weak Scale Supersymmetry and the Prospect for the Observation of Supersymmetry at the Tevatron and at the LHC
• Supersymmetric Dark Matter in Light of WMAP
• Neutralino Dark Matter in Focus Point Supersymmetry
• Calculations of Neutralino-Stau Coannihilation Channels and the Cosmologically Relevant Region of MSSM Parameter Space
• Neutralino-Stau Coannihilation and the Cosmological Upper Limit on the Mass of the Lightest Supersymmetric Particle
• Precise determination of the neutral Higgs boson masses in the MSSM
• Strong Constraints on the Parameter Space of the MSSM from Charge and Color Breaking Minima
• Dark Matter Detection in the Light of Recent Experimental Results
• Regularization Dependence of Running Couplings in Softly Broken Supersymmetry
• WMAP Constraints, SUSY Dark Matter and Implications for the Direct Detection of SUSY
• The CMSSM Parameter Space at Large tan beta
• Cosmological Relic Density from Minimal Supergravity with Implications for Collider Physics
• Anomaly-Free Gauged R-Symmetry
• Light Scalar Top Quarks and Supersymmetric Dark Matter
• Neutralino Dark Matter in Minimal Supergravity: Direct Detection vs. Collider Searches
• Electroweak Precision Observables in the Minimal Supersymmetric Standard Model
• Phase Transitions and Vacuum Tunneling Into Charge and Color Breaking Minima in the MSSM
• An inclusive measurement of the photon energy spectrum in b->s gamma decays
• Measuring and Understanding the Universe
• Yukawa Unified Supersymmetric SO(10) Model: Cosmology, Rare Decays and Collider Searches
• Calculations of Neutralino-Stop Coannihilation in the CMSSM
• Coannihilation Effects and Relic Abundance of Higgsino-Dominant LSPs
• WMAPing out Supersymmetric Dark Matter and Phenomenology
• Decoupling of the $\epsilon$-scalar mass in softly broken supersymmetry
• Predictions in SU(5) Supergravity Grand Unification with Proton Stability and Relic Density Constraints
• Chi**2 analysis of the minimal supergravity model including WMAP, g(mu)-2 and b -> s gamma constraints
• MSSM Higgs Physics at Higher Orders
• Coannihilation Effects in Supergravity and D-Brane Models
• Probing the supersymmetric parameter space by WIMP direct detection
• Constraining Supersymmetry
• Exact Cross Sections for the Neutralino-Slepton Coannihilation
• Decays of the Lightest Top Squark
• Implications of the Pseudo-Scalar Higgs Boson in determining the Neutralino Dark Matter
• WMAPing the Universe: Supersymmetry, Dark Matter, Dark Energy, Proton Decay and Collider Physics
• Neutralino relic density in a Universe with a non-vanishing cosmological constant
• Neutralino Dark Matter in mSUGRA: reopening the light Higgs pole window
• Updated Constraints on the Minimal Supergravity Model
• An Improved Analysis of $b\to s\gamma$ in Supersymmetry
• Stop and Sbottom Searches in Run II of the Fermilab Tevatron
• Particle Dark Matter - A Theorist's Perspective
• Is SUSY accessible by direct dark matter detection?
• Weakened Constraints from $b\to s\gamma$ on Supersymmetry Flavor Mixing Due to Next-To-Leading-Order Corrections
• Superlight neutralino as a dark matter particle candidate
• Four Body Decay of the Stop Squark at the Upgraded Tevatron
• Advantages and Distinguishing Features of Focus Point Supersymmetry
• Observing Virtual LSPs at LEP II
• Squark-, Slepton- and Neutralino-Chargino coannihilation effects in the low-energy effective MSSM
• High-Energy Constraints on the Direct Detection of MSSM Neutralinos
• Virtual LSPs at e+ e- Colliders
• New allowed mSUGRA parameter space from variations of the trilinear scalar coupling A0
• On dark matter search after DAMA with Ge-73
• Are light sneutrinos buried in LEP data?
• Top squark mass: current limits revisited and new limits from Tevatron Run-I

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• Sparticles at the LHC
• Light Higgses at the Tevatron and at the LHC and Observable Dark Matter in SUGRA and D Branes
• Reduced LHC constraints for higgsino-like heavier electroweakinos
• Low mass neutralino dark matter in mSUGRA and more general models in the light of LHC data
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• Bottom-Up Reconstruction Scenarios for (un)constrained MSSM Parameters at the LHC
• Probing the light Higgs pole resonance annihilation of dark matter in the light of XENON100 and CDMS-II observations
• Discovering the constrained NMSSM with tau leptons at the LHC
• Implication of Higgs at 125 GeV within Stochastic Superspace Framework
• Exploring SUSY light Higgs boson scenarios via dark matter experiments
• Search for Top Squarks at Tevatron Inspired by Dark Matter and Electroweak Baryogenesis
• Stop as a next-to-lightest supersymmetric particle in constrained MSSM
• Lepton Flavours at the Early LHC Experiments as the Footprints of the Dark Matter Producing Mechanisms
• SUSY darkmatter at the LHC - 7 TeV
• SUSY signals with small and large trilinear couplings at the LHC 7 TeV runs and neutralino dark matter
• Tracking down the elusive charginos / neutralinos through $\tau$ leptons at the Large Hadron Collider
• Enhanced Tau Lepton Signatures at LHC in Constrained Supersymmetric Seesaw
• Indian Contributions to LHC Theory
• High Scale Physics Connection to LHC Data
• Revisiting the gluino mass limits in the pMSSM in the light of the latest LHC data and Dark Matter constraints