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Kaluza-Klein dark matter and the positron excess
The excess of cosmic positrons observed by the High-Energy Antimatter Telescope (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 …