| Summary: | We discuss a perturbative and non-instantaneous reheating model, adopting a generic post-inflationary scenario with an equation of state <i>w</i>. In particular, we explore the Higgs boson-induced reheating, assuming that it is achieved through a cubic inflaton-Higgs coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow><mi>ϕ</mi><mo>|</mo><mi mathvariant="script">H</mi><mo>|</mo></mrow><mn>2</mn></msup></semantics></math></inline-formula>. In the presence of such coupling, the Higgs doublet acquires a <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ϕ</mi></semantics></math></inline-formula>-dependent mass and a non-trivial vacuum–expectation–value that oscillates in time and breaks the Standard Model gauge symmetry. Furthermore, we demonstrate that the non-standard cosmologies and the inflaton-induced mass of the Higgs field modify the radiation production during the reheating period.This, in turn, affects the evolution of a thermal bath temperature, which has remarkable consequences for the ultraviolet freeze-in dark matter production.
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