Dark matter in UED: the role of the second KK level

作者：Belanger G^*; Kakizaki M; Pukhov A

来源：Journal of Cosmology and Astroparticle Physics, 2011, (2): 009.

DOI：10.1088/1475-7516/2011/02/009

• dark matter theory
• extra dimensions

We perform a complete calculation of the relic abundance of the KK-photon LKP in the universal extra dimension model including all coannihilation channels and all resonances. We show that the production of level 2 particles which decay dominantly into SM particles contribute significantly to coannihilation processes involving level 1 KK-leptons. As a result the preferred dark matter scale is increased to R-1 = 1.3 TeV. A dark matter candidate at or below the TeV scale can only be found in the non-minimal model by reducing the mass splittings between the KK-particles and the LKP. The LKP nucleon scattering cross section is typically small, sigma < 10(-10) pb, unless the KK-quarks are nearly degenerate with the LKP.

• 出版日期2011-2