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arXiv · 0908.4317

Kaluza-Klein Dark Matter After Fermi

Chuan-Ren Chen·Mihoko M. Nojiri·Seong Chan Park·Jing Shu
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Abstract

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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Chuan-Ren Chen, Mihoko M. Nojiri, Seong Chan Park, Jing Shu. 2009-08-31. Kaluza-Klein Dark Matter After Fermi. https://arxiv.org/abs/0908.4317

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