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Relic abundance of dark matter in the minimal universal extra dimension model

Mitsuru Kakizaki·Shigeki Matsumoto·Masato Senami
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Abstract

We investigate the relic abundance of dark matter in the minimal universal extra dimension model including resonance processes by second Kaluza-Klein (KK) particles in all coannihilation processes. After including second KK resonance processes, the relic abundance of dark matter is reduced by about 30%. Thus, the compactification scale 1/R of the extra dimension consistent with the WMAP observation is increased by a few hundred GeV. As a result, the cosmologically allowed compactification scale is 600 GeV < 1/R < 1400 GeV for Lambda R = 20.

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Mitsuru Kakizaki, Shigeki Matsumoto, Masato Senami. 2006-05-26. Relic abundance of dark matter in the minimal universal extra dimension model. https://doi.org/10.1103/physrevd.74.023504

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