40 citations · 135 across the 7 of their papers we have counts for
7 papers
Spontaneous breaking of the Peccei-Quinn symmetry during warm inflation
João G. Rosa, Luís B. Ventura
We show that, for values of the axion decay constant parametrically close to the GUT scale, the Peccei-Quinn phase transition may naturally occur during warm inflation. This result…
Warm Inflation, Neutrinos and Dark matter: a minimal extension of the Standard Model
Miguel Levy, João G. Rosa, Luis B. Ventura
We show that warm inflation can be realized within a minimal extension of the Standard Model with three right-handed neutrinos, three complex scalars and a gauged lepton/B-L U(1) s…
Bending of light in axion backgrounds
Jamie I. McDonald, Luís B. Ventura
In this work we examine refraction of light by computing full solutions to axion electrodynamics. We also allow for the possibility of an additional plasma component. We then speci…
Optical properties of dynamical axion backgrounds
Jamie I. McDonald, Luís B. Ventura
We discuss spectral distortions, time delays and refraction of light in an axion or axion-plasma background. This involves solving the full set of geodesic equations associated to…
Warm Little Inflaton becomes Dark Energy
João G. Rosa, Luís B. Ventura
We present a model where the inflaton field behaves like quintessence at late times, generating the present phase of accelerated expansion. This is achieved within the framework of…
Warm Little Inflaton becomes Cold Dark Matter
Joao G. Rosa, Luis B. Ventura
We present a model where the inflaton can naturally account for all the dark matter in the Universe within the warm inflation paradigm. In particular, we show that the symmetries o…
Fine-structure constant constraints on Bekenstein-type models
P. M. M. Leal, C. J. A. P. Martins, L. B. Ventura
Astrophysical tests of the stability of dimensionless fundamental couplings, such as the fine-structure constant , are an area of much increased recent activity, following some…