33 citations · 130 across the 12 of their papers we have counts for
12 papers
Primordial black holes from local features of the inflaton potential
Alexander Gallego Cadavid, Antonio Enea Romano
Primordial black holes (PBH) can form in the early Universe from peaks of the primordial curvature perturbations. The statistics of the peaks determines the abundance of PBHs, and…
Decoupling-limit consistency of the generalized SU(2) Proca theory
Alexander Gallego Cadavid, Carlos M. Nieto, Yeinzon Rodriguez
We study the consistency of the decoupling limit of the generalized SU(2) Proca theory (GSU2P). Namely, we study the healthiness of those terms whose analysis in the scalar limit w…
Reconstructing homospectral inflationary potentials
Alexander Gallego Cadavid, Antonio Enea Romano, Andrew R. Liddle
Purely geometrical arguments show that there exist classes of homospectral inflationary cosmologies, i.e. different expansion histories producing the same spectrum of comoving curv…
Towards the extended SU(2) Proca theory
Alexander Gallego Cadavid, Carlos M. Nieto, Yeinzon Rodriguez
In this work, we explore the construction of the most general vector-tensor theory with an SU(2) global symmetry in the vector sector as a proposal for a modified theory of gravity…
Generalized SU(2) Proca theory reconstructed and beyond
Alexander Gallego Cadavid, Yeinzon Rodriguez, L. Gabriel Gomez
As a modified gravity theory that introduces new gravitational degrees of freedom, the generalized SU(2) Proca theory (GSU2P for short) is the non-Abelian version of the well-known…
No slow-roll inflation à la Generalized Chaplygin Gas in General Relativity
Alexander Gallego Cadavid, J. R. Villanueva
The Generalized Chaplygin Gas (GCG) model is characterized by the equation of state , where and . The model has been extensively studied due to its inter…
Features in single field slow-roll inflation
Alexander Gallego Cadavid
We compare the effects of local features (LF) and branch features (BF) of the inflaton potential on the spectrum of primordial perturbations. We show that LF affect the spectrum in…
Degeneracy in the spectrum and bispectrum among featured inflaton potentials
Alexander Gallego Cadavid, Antonio Enea Romano, Misao Sasaki
We study the degeneracy of the primordial spectrum and bispectrum of the curvature perturbation in single field inflationary models with a class of features in the inflaton potenti…
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…
Primordial non-Gaussianities produced by features in the potential of single slow-roll inflationary models
Alexander Gallego Cadavid
We study the effects of a general type of features of the inflaton potential on the spectrum and bispectrum of primordial curvature perturbations. These features correspond to a di…
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations
Alexander Gallego Cadavid, Antonio Enea Romano
We study the effects of a class of features of the potential of slow-roll inflationary models corresponding to a step symmetrically dumped by an even power negative exponential fac…
Effects of discontinuities of the derivatives of the inflaton potential
Alexander Gallego Cadavid, Antonio Enea Romano
We study the effects of a class of features of the inflaton potential, corresponding to discontinuties in its derivatives. We perform fully numerical calculations and derive analyt…