Kaluza-Klein Dark Matter After Fermi

Details Kaluza-Klein Dark Matter After Fermi Kaluza-Klein Dark Matter After Fermi

2009-08-31

arxiv.org/abs/0908.4317v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 6 figures

Scientific paper

Kaluza-Klein photon in universal extra dimension models is one of the most attractive dark matter candidates as a weakly interacting massive particle. Having a characteristic split spectrum in split universal extra dimension the relic density of Kaluza-Klein photon with 900 GeV mass is in good agreement with the observed dark matter amount in our Universe. Interestingly Kaluza-Klein photon in the same mass range also provides excellent fits to the recently observed excesses in cosmic electron and positron fluxes. The amount of gamma-ray contributions, mostly from tau decays, can be significant around 300 GeV, thus can be observed or constrained by the forthcoming Fermi-LAT diffuse gamma-ray data.

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