We investigate the explicit role of negative local non-Gaussianity, f NL, in suppressing the
abundance of primordial black holes (PBHs) in the single-field model of Galileon inflation …

There is controversy surrounding the origin and evolution of our universe's largest
supermassive black holes (SMBHs). In this study, we consider the possibility that some of …

In this paper, we review in detail different mechanisms of generation of large primordial
fluctuations and their implications for the production of primordial black holes (PBHs) and …

We demonstrate the explicit realisation of the ultra-slow roll phase in the framework of the
effective field theory of single-field Galileon inflation. The pulsar timing array (PTA) …

In order to unravel the present situation of the PBH overproduction problem, our study
emphasizes the critical role played by the equation of state (EoS) parameter w within the …

The most promising mechanism of generating primordial black holes (PBHs) is by the
enhancement of power spectrum of the primordial curvature perturbation, which is usually …

Explaining the origin of supermassive black holes via a primordial origin is severely
challenged by the tight spectral distortion constraints on the amplitude of the primordial …

In this study, we present an analysis of the fine-tuning required in various inflationary models
in order to explain the production of Primordial Black Holes (PBHs). We specifically examine …

We present a complete and consistent exposition of the regularization, renormalization, and
resummation procedures in the setup of having a contraction and then non-singular bounce …

There is controversy surrounding the origin and evolution of our universe's largest
supermassive black holes (SMBHs). In this study, we consider the possibility that some of …