Kaluza-Klein Dark Matter and the Positron Excess

Abstract

The excess of cosmic positrons observed by the HEAT experiment may be the result of Kaluza-Klein dark matter annihilating in the galactic halo. Kaluza-Klein dark matter annihilates dominantly into charged leptons that yield a large number and hard spectrum of positrons per annihilation. Given a Kaluza-Klein dark matter particle with a mass in the range of 300-400 GeV, no exceptional substructure or clumping is needed in the local distribution of dark matter to generate a positron flux that explains the HEAT observations. This is in contrast to supersymmetric dark matter that requires unnaturally large amounts of dark substructure to produce the observed positron excess. Future astrophysical and collider tests are outlined that will confirm or rule out this explanation of the HEAT data.

arXiv comment5 pages, 3 figures, REVTeX 4

References in corpus (30)

• Supersymmetric Dark Matter
• High-Energy-Physics Event Generation with PYTHIA 6.1
• Bounds on Universal Extra Dimensions
• Production and propagation of cosmic-ray positrons and electrons
• Is the Lightest Kaluza-Klein Particle a Viable Dark Matter Candidate?
• Grand Unification at Intermediate Mass Scales through Extra Dimensions
• Kaluza-Klein Dark Matter
• 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
• Radiative Corrections to Kaluza-Klein Masses
• Measurements of the Cosmic-Ray Positron Fraction From 1 to 50 GeV
• Positron Propagation and Fluxes from Neutralino Annihilation in the Halo
• Cosmic Rays below Z=30 in a diffusion model: new constraints on propagation parameters
• Bosonic Supersymmetry? Getting Fooled at the LHC
• Production of Kaluza-Klein States at Future Colliders
• Elastic Scattering and Direct Detection of Kaluza-Klein Dark Matter
• Prospects for Indirect Detection of Neutralino Dark Matter
• Universal Extra Dimensions and the Higgs Boson Mass
• The Modified Weighted Slab Technique: Models and Results
• The cosmic ray positron excess and neutralino dark matter
• Challenging cosmic ray propagation with antiprotons. Evidence for a "fresh" nuclei component?
• Probing Kaluza-Klein Dark Matter with Neutrino Telescopes
• New results on source and diffusion spectral features of Galactic cosmic rays: I- B/C ratio
• Indirect Detection of Kaluza-Klein Dark Matter
• Cosmic-Ray Positrons: Are There Primary Sources?
• Supersymmetry and the positron excess in cosmic rays
• Supersymmetry and the Cosmic Ray Positron Excess
• Positrons from particle dark-matter annihilation in the Galactic halo: propagation Green's functions
• Can Supersymmetry Naturally Explain the Positron Excess?
• Theory, Phenomenology, and Prospects for Detection of Supersymmetric Dark Matter

Cited by in corpus (65)

• Dark Matter and Collider Phenomenology of Universal Extra Dimensions
• New Positron Spectral Features from Supersymmetric Dark Matter - a Way to Explain the PAMELA Data?
• New limits on dark matter annihilation from AMS cosmic ray positron data
• Gamma Rays from Kaluza-Klein Dark Matter
• Discrimination of Supersymmetry and Universal Extra Dimensions at Hadron Colliders
• Dark Matter Candidates: A Ten-Point Test
• Galactic electrons and positrons at the Earth:new estimate of the primary and secondary fluxes
• Precise Calculation of the Relic Density of Kaluza-Klein Dark Matter in Universal Extra Dimensions
• Decaying Dark Matter and the PAMELA Anomaly
• The Case for a 700+ GeV WIMP: Cosmic Ray Spectra from PAMELA, Fermi and ATIC
• High Energy Positrons From Annihilating Dark Matter
• Dark Matter Candidates
• Full calculation of clumpiness boost factors for antimatter cosmic rays in the light of Lambda-CDM N-body simulation results
• Contrasting Supersymmetry and Universal Extra Dimensions at the CLIC Multi-TeV e+e- Collider
• The galactic antiproton spectrum at high energies: background expectation vs. exotic contributions
• An Effective Theory of Dirac Dark Matter
• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Searching for Dark Matter with Future Cosmic Positron Experiments
• The PAMELA Positron Excess from Annihilations into a Light Boson
• High Energy Positrons and the WMAP Haze from Exciting Dark Matter
• Non-minimal universal extra dimensions
• Two photon annihilation of Kaluza-Klein dark matter
• Cosmic Rays from Leptophilic Dark Matter Decay via Kinetic Mixing
• Clumpiness of Dark Matter and Positron Annihilation Signal: Computing the odds of the Galactic Lottery
• Significant effects of second KK particles on LKP dark matter physics
• Cosmic Positron Signature from Dark Matter in the Littlest Higgs Model with T-parity
• The WIMP Forest: Indirect Detection of a Chiral Square
• Spinless photon dark matter from two universal extra dimensions
• Strategies for Determining the Nature of Dark Matter
• Launch of the Space experiment PAMELA
• Kaluza-Klein Dark Matter and Galactic Antiprotons
• Kaluza-Klein Dark Matter: Direct Detection vis-a-vis LHC
• Dark Matter from Hidden Forces
• The PAMELA and ATIC Signals From Kaluza-Klein Dark Matter
• Inflationary Cosmology Connecting Dark Energy and Dark Matter
• Relic Abundance of LKP Dark Matter in UED model including Effects of Second KK Resonances
• TASI 2008 Lectures on Dark Matter
• Tidal Destruction of The First Dark Microhalos
• Improved Bounds on Universal Extra Dimensions and Consequences for LKP Dark Matter
• Multiple Gamma Lines from Semi-Annihilation
• Gamma-ray Constraints on Dark Matter Annihilation into Charged Particles
• Gamma Ray Lines from a Universal Extra Dimension
• Kaluza-Klein Dark Matter, Electrons and Gamma Ray Telescopes
• High-energetic Cosmic Antiprotons from Kaluza-Klein Dark Matter
• TASI 2004 Lectures on the Phenomenology of Extra Dimensions
• Study of the Gamma-ray Spectrum from the Galactic Center in view of Multi-TeV Dark Matter Candidates
• Fermi/LAT observations of Dwarf Galaxies highly constrain a Dark Matter Interpretation of Excess Positrons seen in AMS-02, HEAT, and PAMELA
• Distinguishing Between Dark Matter and Pulsar Origins of the ATIC Electron Spectrum With Atmospheric Cherenkov Telescopes
• Indirect Detection of Dirac Right-Handed Neutrino Dark Matter
• Astrophysical Uncertainties in the Cosmic Ray Electron and Positron Spectrum From Annihilating Dark Matter
• Distinguishing Supersymmetry From Universal Extra Dimensions or Little Higgs Models With Dark Matter Experiments
• The DAMPE excess and gamma-ray constraints
• Warped Kaluza-Klein Dark Matter
• Enhanced Line Signals from Annihilating Kaluza-Klein Dark Matter
• The Pamela Cosmic Ray Space Observatory: Detector, Objectives and First Results
• Status Report on Universal Extra Dimensions After LHC8
• Phenomenology of Universal Extra Dimensions
• Determining Supersymmetric Parameters With Dark Matter Experiments
• Pamela, FGST and Sub-Tev Dark Matter
• Indirect Detection of Kaluza-Klein Dark Matter from Latticized Universal Dimensions
• Weyl-Invariant Gravity and the Nature of Dark Matter
• Phenomenology of the Hidden SU(2) Vector Dark Matter Model
• Annihilation cross sections and interaction couplings of the dark matter candidates in the warped and flat extra dimensions
• Investigating the emission signatures of pulsar halo candidate HESS J1813-126
• The effect of the curvature-scalar mixing on the annihilation cross sections of dark matter scalar and unparticle dark matter