Gamma Rays from Neutralino Annihilation

Abstract

We calculate the flux of cosmic gamma rays expected {}from the annihilation of neutralinos in the Galactic halo. Our calculation of the annihilation cross section to two photons improves the existing calculations by inclusion of exact one-loop diagrams for the amplitudes involving Higgs boson and chargino states as well as those involving fermion and sfermion states. A survey of supersymmetric parameter space shows that numerous models would be observable at the $3\sigma$ level with an air Cerenkov telescope with an exposure of $10^4 \meter^2 \yr$.

12 pages, self-unpacking uuencoded PostScript

References in corpus (4)

• The Neutralino Relic Density in Minimal N=1 Supergravity
• Gamma ray lines from TeV dark matter
• Neutralino Annihilation to Gluons
• Searching for TeV dark matter by atmospheric Cerenkov techniques

Cited by in corpus (26)

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• DarkSUSY: Computing Supersymmetric Dark Matter Properties Numerically
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• Full One-loop Calculation of Neutralino Annihilation into Two Photons
• Spectral Gamma-ray Signatures of Cosmological Dark Matter Annihilation
• TeV Gamma-Ray Observations of the Galactic Center
• Unitarity and Higher-Order Corrections in Neutralino Dark Matter Annihilation into Two Photons
• Neutralino Annihilation into Two Photons
• Neutralino annihilation into gamma-rays in the Milky Way and in external galaxies
• Kinetic decoupling of neutralino dark matter
• EGRET Excess of Diffuse Galactic Gamma Rays as Tracer of Dark Matter
• Indirect signals from light neutralinos in supersymmetric models without gaugino mass unification
• Upper limit for gamma-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco
• Dark matter line search using a joint analysis of dwarf galaxies with the Fermi Gamma-ray Space Telescope
• Theory, Phenomenology, and Prospects for Detection of Supersymmetric Dark Matter
• Gamma-ray boxes from axion-mediated dark matter
• Galactic diffusion and the antiprotron signal of supersymmetric dark matter
• Evidence for Dark Matter Annihilation from Galactic Gamma Rays?
• Antimatter research in Space
• Excess of EGRET Galactic Gamma Ray Data interpreted as Dark Matter Annihilation
• Extra-Dimensions and Dark Matter
• $\gamma$-ray flux from Dark Matter Annihilation in Galactic Caustics
• Constraints on Cold Dark Matter in the Gamma-ray Halo of NGC 253
• Monochromatic Gamma Rays from Dark Matter Annihilation to Leptons
• Dark Matter Constituents
• Dark Matter and Fundamental Physics Searches with IACTs