Quintessential Kination and Thermal Production of SUSY e-WIMPs
نویسندگان
چکیده
The impact of a kination-dominated (KD) phase generated by a quintessential exponential model on the thermal abundance of Supersymmetric (SUSY) extremely Weekly Interacting Massive Particles (e-WIMPs) is investigated. For values of the quintessential energy-density parameter at the eve of nucleosynthesis close to its upper bound, we find that (i) the gravitino (G̃) constraint is totally evaded for unstable G̃’s; (ii) the thermal abundance of stable G̃ is not sufficient to account for the cold dark matter (CDM) of the universe; (iii) the thermal abundance of axinos (ã) can satisfy the CDM constraint for values of the initial (“reheating”) temperature well above those required in the standard cosmology (SC).
منابع مشابه
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