662 citations · 4.2k across the 84 of their papers we have counts for
9 papers · 1 filter
CMB anomalies and the effects of local features of the inflaton potential
Alexander Gallego Cadavid, Antonio Enea Romano, Stefano Gariazzo
Recent analysis of the WMAP and Planck data have shown the presence of a dip and a bump in the spectrum of primordial perturbations at the scales Mpc and $k=0.00…
Light sterile neutrinos and pseudoscalar interactions in cosmology
Stefano Gariazzo
The Short BaseLine (SBL) neutrino oscillations anomalies hint at the presence of a sterile neutrino with a mass of around 1 eV. However, such neutrino is highly incompatible with t…
Pseudoscalar - sterile neutrino interactions: reconciling the cosmos with neutrino oscillations
Maria Archidiacono, Stefano Gariazzo, Carlo Giunti +4
The Short BaseLine (SBL) neutrino oscillation anomalies hint at the presence of a sterile neutrino with a mass of around 1 eV. However, such a neutrino is incompatible with cosmolo…
Primordial power spectrum features in phenomenological descriptions of inflation
Stefano Gariazzo, Olga Mena, Hector Ramirez +1
We extend an alternative, phenomenological approach to inflation by means of an equation of state and a sound speed, both of them functions of the number of -folds and four phen…
New Developments in Cosmology
Stefano Gariazzo
In this Thesis I discuss several recent results obtained using the CMB spectra measured by Planck and several other cosmological probes. Extensions of the CDM model are studied,…
Dark Radiation and Inflationary Freedom
Stefano Gariazzo
We perform a cosmological analysis in which we allow the primordial power spectrum of scalar perturbations to assume a shape that is different with respect to the usual power-law,…
Constraints on the Coupling between Dark Energy and Dark Matter from CMB data
Riccardo Murgia, Stefano Gariazzo, Nicolao Fornengo
We investigate a phenomenological non-gravitational coupling between dark energy and dark matter, where the interaction in the dark sector is parameterized as an energy transfer ei…
Light Sterile Neutrinos In Cosmology
Stefano Gariazzo
We briefly discuss the main effects of the presence of a Light Sterile Neutrino (LS) in Cosmology and how its properties can be constrained by Cosmic Microwave Background (CMB)…
Dark Radiation and Inflationary Freedom after Planck 2015
Eleonora Di Valentino, Stefano Gariazzo, Martina Gerbino +2
The simplest inflationary models predict a primordial power spectrum (PPS) of the curvature fluctuations that can be described by a power-law function that is nearly scale-invarian…