Relic abundance of dark matter in universal extra dimension models with right-handed neutrinos

Abstract

Relic abundance of dark matter is investigated in the framework of universal extra dimension models with right-handed neutrinos. These models are free from the serious Kaluza-Klein (KK) graviton problem that the original universal extra dimension model has. The first KK particle of the right-handed neutrino is a candidate for dark matter in this framework, and its relic abundance is determined by three processes, (1) the decay of the KK photon into the first KK right-handed neutrino in the late universe, (2) production of the first KK right-handed neutrino from the thermal bath in the early universe, and (3) the decay of higher KK right-handed neutrinos into the first KK right-handed neutrino in the late universe. When ordinary neutrino masses are large enough such as the degenerate mass spectrum case, the last process contribute to the abundance significantly, even if the reheating temperature is low. The scale of the extra dimension consistent with cosmological observations can be 500 GeV in the minimal setup of universal extra dimension models with right-handed neutrinos.

added references, changed figure 3 and figure 4

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Cited by in corpus (10)

• Scalar Bilepton Dark Matter
• Kaluza-Klein Dark Matter: Direct Detection vis-a-vis LHC
• Global fits of the Minimal Universal Extra Dimensions scenario
• Investigation of Dark Matter in Minimal 3-3-1 Models
• Productions of second Kaluza-Klein gauge bosons in the minimal universal extra dimension model at LHC
• Direct Detection of Kaluza-Klein Particles in Neutrino Telescopes
• Dilepton + jet signature of Split-UED at the LHC
• Radiative corrections to the lightest KK states in the T^2/(Z_2\times Z_2') orbifold
• Is it possible to unify three kinds of Dark Matters into a Kaluza-Klein Neutrino?
• The neutrino masses and the change of allowed parameter region in universal extra dimension models