249 citations · 3.5k across the 127 of their papers we have counts for
11 papers · 1 filter
Cosmological density perturbations in modified gravity theories
A. de la Cruz-Dombriz, A. Dobado, A. L. Maroto
In the context of f(R) theories of gravity, we study the cosmological evolution of scalar perturbations by using a completely general procedure. We find that the exact fourth-order…
Is the CMB cold spot a gate to extra dimensions?
J. A. R. Cembranos, A. de la Cruz-Dombriz, A. Dobado +1
One of the most striking features found in the cosmic microwave background data is the presence of an anomalous Cold Spot (CS) in the temperature maps made by the Wilkinson Microwa…
Could dark matter or neutrinos discriminate between the enantiomers of a chiral molecule?
Pedro Bargueno, Antonio Dobado, Isabel Gonzalo
We examine the effect of cold dark matter on the discrimination between the two enantiomers of a chiral molecule. We estimate the energy difference between the two enantiomers due…
An introduction to the dark energy problem
Antonio Dobado, Antonio L. Maroto
In this work we review briefly the origin and history of the cosmological constant and its recent reincarnation in the form of the dark energy component of the universe. We also co…
On the evolution of density perturbations in f(R) theories of gravity
A. de la Cruz-Dombriz, A. Dobado, A. L. Maroto
In the context of theories of gravity, we study the evolution of scalar cosmological perturbations in the metric formalism. Using a completely general procedure, we find the…
Indirect signals from braneworlds
Jose A. R. Cembranos, Alvaro de la Cruz-Dombriz, Antonio Dobado +1
It has been suggested that our universe could be a 3-dimensional brane where the SM fields live embedded in a D-dimensional space-time. In flexible raneworlds, in addition to the S…
Catching photons from extra dimensions
J. A. R. Cembranos, A. Dobado, A. L. Maroto
In extra-dimensional brane-world models with low tension, brane excitations provide a natural WIMP candidate for dark matter. Taking into account the various constraints coming fro…
New Developments in Extra-dimensional Dark Matter
Jose A. R. Cembranos, Antonio Dobado, Jonathan L. Feng +3
We summarize the main features of several dark matter candidates in extra-dimensional theories. In particular, we review Kaluza-Klein (KK) gravitons in universal extra dimensions a…
Dark matter from extra dimensions
J. A. R. Cembranos, A. Dobado, A. L. Maroto
In brane-world models with low tension, massive branons are natural candidates for dark matter. The phenomenology of these WIMP-like particles is completely determined by their mas…
Branon dark matter: an introduction
J. A. R. Cembranos, A. Dobado, A. L. Maroto
This is a brief introduction to branon physics and its role in the dark matter problem. We pay special attention to the phenomenological consequences, both in high-energy particle…
Primordial torsion fields as an explanation of the anisotropy in cosmological electromagnetic propagation
Antonio Dobado, Antonio L. Maroto
In this note we provide a simple explanation of the recent finding of anisotropy in electromagnetic (EM) propagation claimed by Nodland and Ralston (astro-ph/9704196). We consider,…