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Superheavy Dark Matter from Thermal Inflation

Lam Hui·Ewan D. Stewart
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Abstract

It is quite plausible that the mass of the dark matter particle increases significantly after its freeze-out, due to a scalar field rolling to large values. We describe a realization of this scenario in the context of thermal inflation which naturally gives a cold dark matter particle with the correct cosmological abundance and a mass around $10^{10} {\rm GeV}$, evading the conventional upper bound of $10^5 {\rm GeV}$. We also discuss another realization which could produce a cosmologically interesting abundance of near Planck mass, possibly electromagnetically charged, particles. The detection and observational consequences of superheavy cold dark matter or WIMPZILLAs are briefly examined.

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Lam Hui, Ewan D. Stewart. 1999-08-18. Superheavy Dark Matter from Thermal Inflation. https://doi.org/10.1103/physrevd.60.023518

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