Kaluza-Klein Dark Matter, Electrons and Gamma Ray Telescopes

Abstract

Kaluza-Klein dark matter particles can annihilate efficiently into electron-positron pairs, providing a discrete feature (a sharp edge) in the cosmic $e^{+}{e}^{-}$ spectrum at an energy equal to the particle's mass (typically several hundred GeV to one TeV). Although this feature is probably beyond the reach of satellite or balloon-based cosmic ray experiments (those that distinguish the charge and mass of the primary particle), gamma ray telescopes may provide an alternative detection method. Designed to observe very high-energy gamma-rays, ACTs also observe the diffuse flux of electron-induced electromagnetic showers. The GLAST satellite, designed for gamma ray astronomy, will also observe any high energy showers (several hundred GeV and above) in its calorimeter. We show that high-significance detections of an electron-positron feature from Kaluza-Klein dark matter annihilations are possible with GLAST, and also with ACTs such as HESS, VERITAS or MAGIC.

10 pages, 2 figures

References in corpus (5)

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• Gamma Rays from Kaluza-Klein Dark Matter
• Searching for Dark Matter with Future Cosmic Positron Experiments
• Kaluza-Klein Dark Matter and the Positron Excess
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Cited by in corpus (26)

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• Precise Calculation of the Relic Density of Kaluza-Klein Dark Matter in Universal Extra Dimensions
• Pre-launch estimates for GLAST sensitivity to Dark Matter annihilation signals
• Observations of the Sagittarius Dwarf galaxy by the H.E.S.S. experiment and search for a Dark Matter signal
• Non-minimal universal extra dimensions
• The PAMELA and ATIC Excesses From a Nearby Clump of Neutralino Dark Matter
• Significant effects of second KK particles on LKP dark matter physics
• The PAMELA and ATIC Signals From Kaluza-Klein Dark Matter
• Relic Abundance of LKP Dark Matter in UED model including Effects of Second KK Resonances
• TASI 2008 Lectures on Dark Matter
• Minimal Universal Extra Dimensions in CalcHEP/CompHEP
• Phenomenology of Dirac Neutralino Dark Matter
• Improved Bounds on Universal Extra Dimensions and Consequences for LKP Dark Matter
• A search for a dark matter annihilation signal towards the Canis Major overdensity with H.E.S.S
• Gamma Ray Lines from a Universal Extra Dimension
• Search for Gamma-rays from Dark Matter annihilations around Intermediate Mass Black Holes with the H.E.S.S. experiment
• Testing The Light Dark Matter Hypothesis With AMS
• Indirect Detection of Dirac Right-Handed Neutrino Dark Matter
• Warped Kaluza-Klein Dark Matter
• Enhanced Line Signals from Annihilating Kaluza-Klein Dark Matter
• Validating the Galaxy and Quasar Catalog-Level Blinding Scheme for the DESI 2024 analysis
• Status Report on Universal Extra Dimensions After LHC8
• Phenomenology of Universal Extra Dimensions
• Pamela, FGST and Sub-Tev Dark Matter
• The effect of the curvature-scalar mixing on the annihilation cross sections of dark matter scalar and unparticle dark matter