279 citations · 488 across the 13 of their papers we have counts for
5 papers · 1 filter
On the Expected Production of Gravitational Waves During Preheating
C. Armendariz-Picon
The existing predictions of the energy density of gravitational waves produced during preheating mostly rely on computer simulations in which the matter field inhomogeneities essen…
How Cold is Cold Dark Matter?
Cristian Armendariz-Picon, Jayanth T. Neelakanta
If cold dark matter consists of particles, these must be non-interacting and non-relativistic by definition. In most cold dark matter models however, dark matter particles inherit…
Structure Formation Constraints on Sommerfeld-Enhanced Dark Matter Annihilation
C. Armendariz-Picon, Jayanth T. Neelakanta
We study the growth of cosmic structure under the assumption that dark matter self-annihilates with an averaged cross section times relative velocity that grows with the scale fact…
Primordial Perturbations in Einstein-Aether and BPSH Theories
Cristian Armendariz-Picon, Noela Farina Sierra, Jaume Garriga
We study the primordial perturbations generated during a stage of single-field inflation in Einstein-aether theories. Quantum fluctuations of the inflaton and aether fields seed lo…
Aether Unleashed
Cristian Armendariz-Picon, Alberto Diez-Tejedor
We follow a low-energy effective theory approach to identify the general class of theories that describes a vector field (of unconstrained norm) coupled to gravity. The resulting s…