The growing cosmological interest of different entropy functions (like the Tsallis entropy, the
Rényi entropy, the Barrow entropy, the Sharma-Mittal entropy, the Kaniadakis entropy and …

A bstract A model of vector dark matter that communicates with the Standard Model only
through gravitational interactions has been investigated. It has been shown in detail how …

A bstract In this paper, we extensively analyzed the reheating dynamics after inflation and
looked into its possible implication on dark matter (DM) and inflaton phenomenology. We …

We are in the era of precision cosmology which offers us a unique opportunity to investigate
beyond standard model physics. Toward this endeavor, inflaton is assumed to be a perfect …

Gravitational dark matter (DM) is the simplest possible scenario that has recently gained
interest in the early Universe cosmology. In this scenario, DM is assumed to be produced …

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 …

A notable feature of UV freeze-in is that the relic density is strongly dependent on the highest
temperatures of the thermal bath, and a common assumption is that the relevant" highest …

Primordial gravitational waves (GWs) carry the imprints of the dynamics of the universe
during its earliest stages. With a variety of GW detectors being proposed to operate over a …

Assuming that inflation is followed by a phase where the energy density of the Universe is
dominated by a component with a general equation of state, we evaluate the spectrum of …

Abstract Weakly Interacting Massive Particles (WIMPs) are among the best-motivated dark
matter candidates. In the standard scenario where the freeze-out happens well after the end …