Kaluza-Klein Dark Matter After Fermi

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.

19 pages, 6 figures

References in corpus (1)

• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

Cited by in corpus (7)

• Nonabelian dark matter: models and constraints
• LHC 750 GeV Diphoton excess in a radiative seesaw model
• A vector-like fourth generation with a discrete symmetry from Split-UED
• Search for Higgs bosons of the Universal Extra Dimensions at the Large Hadron Collider
• 5D UED: Flat and Flavorless
• Possible Suppression of Resonant Signals for Split-UED by Mixing at the LHC?
• Dilepton + jet signature of Split-UED at the LHC