Gravitational waves (GWs) have a great potential to probe cosmology. We review early
universe sources that can lead to cosmological backgrounds of GWs. We begin by …

It is commonly assumed that the energy density of the Universe was dominated by radiation
between reheating after inflation and the onset of matter domination 54,000 years later …

We report on the implications for cosmic inflation of the 2018 release of the Planck cosmic
microwave background (CMB) anisotropy measurements. The results are fully consistent …

Primordial black holes (PBH) have been shown to arise from high peaks in the matter power
spectra of multi-field models of inflation. Here we show, with a simple toy model, that it is …

This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP
(search for hidden particles) experiment is intended to hunt for new physics in the largely …

The current flow of high accuracy astrophysical data, among which are the Cosmic
Microwave Background (CMB) measurements by the Planck satellite, offers an …

Abstract Primordial Black Holes (PBH) arise naturally from high peaks in the curvature
power spectrum of near-inflection-point single-field inflation, and could constitute today the …

We develop a new class of chaotic inflation models with spontaneously broken conformal
invariance. Observational consequences of a broad class of such models are stable with …

Neutrinos are the only particles in the Standard Model (SM) of particle physics that have only
been observed with left handed chirality to date. If right handed (RH) neutrinos exist, they …

The properties of the recently discovered Higgs boson together with the absence of new
physics at collider experiments allows us to speculate about consistently extending the …