Indirect Signals from Dark Matter in Split Supersymmetry

Abstract

We study the possibilities for the indirect detection of dark matter in Split Supersymmetry from gamma-rays, positrons, and antiprotons. The most promising signal is the gamma-ray line, which may be observable at the next generation of detectors. For certain halo profiles and a high mass neutralino, the line can even be visible in current experiments. The continuous gamma-ray signal may be observable, if there is a central spike in the galactic halo density. The signals are found to be similar to those in MSSM models. These indirect signals complement other experiments, being most easily observable for regions of parameter space, such as heavy wino and higgsino dominated neutralinos, which are least accessible for direct detection and accelerator searches.

10 pages, 5 figures; experimental sensitivities added to figure 2, revised version to appear in Phys. Rev. D

References in corpus (29)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• A Universal Density Profile from Hierarchical Clustering
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• DarkSUSY: Computing Supersymmetric Dark Matter Properties Numerically
• Supersymmetric Unification Without Low Energy Supersymmetry And Signatures for Fine-Tuning at the LHC
• Neutralino Relic Density including Coannihilations
• Aspects of Split Supersymmetry
• Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo
• Diffuse Galactic continuum gamma rays. A model compatible with EGRET data and cosmic-ray measurements
• The Status of the H.E.S.S. Project
• Precision Measurement of Cosmic-Ray Antiproton Spectrum
• Full One-loop Calculation of Neutralino Annihilation into Two Photons
• Prospects for Indirect Detection of Neutralino Dark Matter
• Neutralino Annihilation into a Photon and a Z boson
• Accurate relic densities with neutralino, chargino and sfermion coannihilations in mSUGRA
• Signatures of long-lived gluinos in split supersymmetry
• Dark Matter in the Finely Tuned Minimal Supersymmetric Standard Model
• Split Supersymmetry at Colliders
• The Role of Antimatter Searches in the Hunt for Supersymmetric Dark Matter
• Split Supersymmetry, stable gluino, and gluinonium
• Direct and Indirect Detection of Neutralino Dark Matter In Selected Supersymmetry Breaking Scenarios
• One Loop Predictions of the Finely Tuned SSM
• The Higgs Boson Mass in Split Supersymmetry at Two-Loops
• Probing Split Supersymmetry with Cosmic Rays
• Chargino Pair Production at Linear Collider and Split Supersymmetry
• Indirect detection of neutralino dark matter candidates in anomaly-mediated supersymmetry breaking scenarios
• Flux Sensitivity of VERITAS
• The MAGIC Telescope Project for Gamma Astronomy above 10 GeV

Cited by in corpus (15)

• The MSSM with heavy scalars
• Neutralino Dark Matter Detection in Split Supersymmetry Scenarios
• Phenomenology of Dirac Neutrinogenesis in Split Supersymmetry
• Higgs Boson Exempt No-Scale Supersymmetry and its Collider and Cosmology Implications
• Environmentally Selected WIMP Dark Matter with High-Scale Supersymmetry Breaking
• Supersymmetry for Fermion Masses
• Higgsino dark matter in partly supersymmetric models
• Tachyonic Squarks in Split Supersymmetry
• Structure of split supersymmetry and simple models
• Hunting long-lived gluinos at the Pierre Auger Observatory
• Distinguishing split supersymmetry in Higgs signals at the Large Hadron Collider
• Dark Matter in split extended supersymmetry
• Gravitino dark matter from gluino late decay in split supersymmetry
• Vacuum Stability in Split Susy and Little Higgs Models
• Theory and Phenomenology of Dirac Leptogenesis