The neutrino masses and the change of allowed parameter region in universal extra dimension models

Details The neutrino masses and the change of allowed parameter region in universal extra dimension models The neutrino masses and the change of allowed parameter region in universal extra dimension models

2007-11-16

arxiv.org/abs/0711.2600v1

J.Phys.Conf.Ser.120:042007,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, to appear in the conference proceedings of TAUP 2007

Scientific paper

10.1088/1742-6596/120/4/042007

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 possesses. The first KK particle of the right-handed neutrino is a candidate for dark matter in this framework. When ordinary neutrino masses are large enough such as the degenerate mass spectrum case, the dark matter relic abundance can change significantly. 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.

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