Dark Matter Constraints on Gaugino/Higgsino Masses in Split Supersymmetry and Their Implications at Colliders

Abstract

In split supersymmetry, gauginos and Higgsinos are the only supersymmetric particles which are possibly accessible at foreseeable colliders. While the direct experimental searches, such as LEP and Tevatron experiments, gave robust lower bounds on the masses of these particles, the cosmic dark matter can give some upper bounds and thus have important implications for the searches at future colliders. In this work we scrutinize such dark matter constraints and show the allowed mass range for charginos and neutralinos (the mass eigenstates of gauginos and Higgsinos). We find that the lightest chargino must be lighter than about 1 TeV under the popular assumption M_1=M_2/2 and about 2 or 3 TeV in other cases. The corresponding production rates of the lightest chargino at the CERN Large Hadron Collider (LHC) and the International Linear Colldier (ILC) are also shown. While in some parts of the allowed region the chargino pair production rate can be larger than 1 pb at LHC and 100 fb at the ILC, other parts of the region correspond to very small production rates and thus there is no guarantee to find the charginos of split supersymmetry at future colliders.

arXiv commentversion in EPJC (refs added)

References in corpus (11)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Squark and Gluino Production at Hadron Colliders
• Superweakly Interacting Massive Particles
• Dark Matter in the Finely Tuned Minimal Supersymmetric Standard Model
• Neutralino Dark Matter Detection in Split Supersymmetry Scenarios
• Chargino Pair Production at Linear Collider and Split Supersymmetry
• Splitting the split supersymmetry
• Standard Model Compactifications of IIA Z3 x Z3 Orientifolds from Intersecting D6-branes
• How heavy can the Fermions in Split Susy be? A study on Gravitino and Extradimensional LSP
• Lightest Higgs Boson Mass in Split Supersymmetry with See-saw Mechanism

Cited by in corpus (10)

• The MSSM with heavy scalars
• Decays of $H^0/A^0$ in supersymmetric scenarios with heavy sfermions
• R-symmetric High Scale Supersymmetry
• A sharp 141 GeV Higgs prediction from environmental selection
• Slim SUSY
• A split SUSY model from SUSY GUT
• Split Supersymmetry Under GUT and Current Dark Matter Constraints
• Split-SUSY dark matter in light of direct detection limits
• Virtual Effects of Split SUSY in Higgs Productions at Linear Colliders
• The PeV-Scale Split Supersymmetry from Higgs Mass and Electroweak Vacuum Stability