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We compare the dark matter (DM) production processes and its parameters space in the background of reheating obtained from two chief systems in the early Universe: the inflaton ϕ and the primordial black holes (PBHs).
The postinflationary reheating phase is usually said to be solely governed by the decay of coherently oscillating inflatons into radiation. In this submission, we explore a new avenue towards reheating through the evaporation of primordial black holes (PBHs). After the inflation, if PBHs form, depending on its initial mass, abundance, and inflaton coupling with the radiation, we found two physically distinct possibilities of reheating the Universe.
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