99 citations · 285 across the 13 of their papers we have counts for
13 papers
Neutrino mixing sum rules and the Littlest Seesaw
Francesco Costa, Stephen F. King
In this work, we study the neutrino mixing sum rules arising from discrete symmetries, and the class of Littlest Seesaw (LS) neutrino models. These symmetry based approaches all of…
Freeze-in at stronger coupling
Catarina Cosme, Francesco Costa, Oleg Lebedev
Predictivity of many non-thermal dark matter (DM) models is marred by the gravitational production background. This problem is ameliorated in models with lower reheating temperatur…
Two-component WIMP FIMP dark matter
Francesco Costa
The document discusses a proposed extension to the Standard Model that aims to explain the presence of neutrino masses and the existence of dark matter. The model includes two pote…
Dynamical and observational analysis of interacting models
F. E. M. Costa, A. O. Ribeiro, F. Roig
We investigate the dynamical behaviour of a general class of interacting models in the dark sector in which the phenomenological coupling between cold dark matter and dark energy i…
A possible analogy between the dynamics of a skydiver and a scalar field: cosmological consequences
F. E. M. Costa
The cosmological consequences of a slow rolling scalar field with constant kinetic term in analogy to the vertical movement of a skydiver after reaching terminal velocity are inves…
On the equivalence of Lambda(t) and gravitationally induced particle production cosmologies
L. L. Graef, F. E. M. Costa, J. A. S. Lima
The correspondence between cosmological models powered by a decaying vacuum energy density and gravitationally induced particle production is investigated. Although being physicall…