Requirements to Detect the Monoenergetic Photon Signature of Thermal Cold Dark Matter in PeV-Scale Split Supersymmetry

Abstract

Split supersymmetry scenarios with PeV-scale scalar masses circumvent many of the restrictions on supersymmetry coming from experimental limits on CP violation, flavor-changing neutral currents, and the Higgs boson mass. We consider the situation where the LSP is either a Wino or Higgsino and the majority of its cold dark matter relic density is of thermal origin, in which case its mass is specified to be 2.3 TeV for a Wino or 1.1 TeV for a Higgsino. We examine the potential for indirect detection, at present and future gamma-ray telescopes, of the monoenergetic photon lines that would result from the annihilation of these particles near the galactic center. We show how the possibility for detection depends on the precise form of the galactic dark-matter halo profile and examine what performance attributes a gamma-ray detector would need in order to register a 5-sigma discovery.

16 pages, 6 figures

References in corpus (6)

• Aspects of Split Supersymmetry
• Diffuse Galactic continuum gamma rays. A model compatible with EGRET data and cosmic-ray measurements
• PeV-Scale Supersymmetry
• Dark Matter in the Finely Tuned Minimal Supersymmetric Standard Model
• Neutralino Dark Matter Detection in Split Supersymmetry Scenarios
• One Loop Predictions of the Finely Tuned SSM

Cited by in corpus (5)

• TeV Scale Singlet Dark Matter
• Phenomenology of Dirac Neutrinogenesis in Split Supersymmetry
• Higgs Boson Exempt No-Scale Supersymmetry and its Collider and Cosmology Implications
• Looking for a heavy wino LSP in collider and dark matter experiments
• Theory and Phenomenology of Dirac Leptogenesis