We consider the direct s-channel gravitational production of dark matter during the reheating
process. Independent of the identity of the dark matter candidate or its nongravitational …

We analyze in detail the perturbative decay of the inflaton oscillating about a generic form of
its potential V (ϕ)= ϕ k, taking into account the effects of non-instantaneous reheating. We …

We perform a systematic analysis of dark matter production during postinflationary
reheating. Following the period of exponential expansion, the inflaton begins a period of …

We discuss the footprint of evaporation of primordial black holes (PBHs) on stochastic
gravitational waves (GWs) induced by scalar perturbations. We consider the case where …

We investigate the power spectrum of Non-Cold Dark Matter (NCDM) produced in a state out
of thermal equilibrium. We consider dark matter production from the decay of scalar …

We consider the effects of fragmentation on the post-inflationary epoch of reheating. In
simple single field models of inflation, an inflaton condensate undergoes an oscillatory …

Gravitational particle production is a minimal contribution to reheating the Universe after the
end of inflation. To study this production channel, two different approaches have commonly …

We generalize models invoking a spin-2 particle as a mediator between the dark sector and
the standard model. We show that a massive spin-2 messenger can efficiently play the role …

A bstract A reheating phase in the early universe is an essential part of all inflationary
models during which not only the Standard Model (SM) quanta are produced but it can also …

We investigate the production of particle Dark Matter (DM) in a minimal freeze-in model
considering a non-instantaneous reheating phase after inflation. We demonstrate that for …