Gamma Rays from Kaluza-Klein Dark Matter

2004/10/31 by Lars Bergstrom, Lars Bergström, Torsten Bringmann +3 · 14 citations
Physics and Astronomy · #Astrophysics #Bremsstrahlung #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Electron #Extra dimensions #Kaluza–Klein theory #Lepton #Light dark matter #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Scalar field dark matter #Weakly interacting massive particles #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevlett.94.131301

published as Phys.Rev.Lett.94:131301,2005 · 4 pages, 3 figures. Revised version; minor changes in text and figures, two references added

openalex publication_date 2005/04/08 · arxiv created 2005/04/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A TeV gamma-ray signal from the direction of the Galactic center (GC) has been detected by the HESS experiment. Here, we investigate whether Kaluza-Klein (KK) dark matter annihilations near the GC can be the explanation. Including the contributions from internal bremsstrahlung as well as subsequent decays of quarks and tau leptons, we find a very flat gamma-ray spectrum which drops abruptly at the dark matter particle mass. For a KK mass of about 1 TeV, this gives a good fit to the HESS data below 1 TeV. A similar model, with gauge coupling roughly 3 times as large and a particle mass of about 10 TeV, would give both the correct relic density and a photon spectrum that fits the complete range of data.

Citations

• Universal extra dimensions and b→sγ
• Neutralino annihilation intoγrays in the Milky Way and in external galaxies
• Extra spacetime dimensions and unification
• Formation of Galactic Nuclei
• Dark-matter spike at the galactic center?
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• The Galactic center as a dark matter gamma-ray source
• Direct detection rates for Kaluza-Klein dark matter

Cited by

• Stellar orbit constraints on neutralino annihilation at the galactic center
• Higgs dark matter in UEDs: A good WIMP with bad detection prospects
• Discriminating dark matter candidates using direct detection
• Sensitivity of HAWC to high-mass dark matter annihilations
• Fermi LAT search for internal bremsstrahlung signatures from dark matter annihilation
• Glueball scattering cross section in lattice SU(2) Yang-Mills theory
• Updated cosmic-ray and radio constraints on light dark matter: Implications for the GeV gamma-ray excess at the Galactic Center
• Fermi Large Area Telescope Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications
• Gamma Rays from Heavy Neutralino Dark Matter
• Cosmic Neutrino Bound on the Dark Matter Annihilation Rate in the Late Universe
• Characterization of dark-matter-induced anisotropies in the diffuse gamma-ray background
• Constraining decaying dark matter with Fermi LAT gamma-rays
• Constraining the monochromatic gamma-rays from dark matter annihilation by the LHC
• Astrophysics in 2005