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Autor López Maroto, Antonio |
Documentos disponibles escritos por este autor (100)
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Alcazar, J. ; Ruiz Cembranos, José Alberto ; Dobado González, Antonio ; López Maroto, Antonio | Amer Physical Soc | 2003-04In the context of the brane-world scenarios with compactified large extra dimensions, we study the production of the possible massive brane oscillations (branons) in electron-positron colliders. We compute their contribution to the electroweak g[...]![]()
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Ruiz Cembranos, José Alberto ; López Maroto, Antonio ; Villarrubia Rojo, Héctor | Oxford Univ Press | 2020-09We explore the possibility that matter bulk flows could generate the required vorticity in the electron-proton-photon plasma to source cosmic magnetic fields through the Harrison mechanism. We analyze the coupled set of perturbed Maxwell and Bol[...]![]()
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Cermeño, M. ; Carro, J. ; López Maroto, Antonio ; Pérez García, M. A. | IOP publishing ltd | 2019-02-20Using a perturbative approach we solve stellar structure equations for low-density (solar-type) stars whose interior is described with a polytropic equation of state in scenarios involving a subset of modified gravity (MG) theories. Rather than [...]![]()
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López Maroto, Antonio ; Beltrán Jiménez, José ; Gottloeber, Stefan ; Yepes Alonso, Gustavo ; Knebe, Alexander ; Carlesi, Edoardo | Wiley-Blackwell | 2012-07We present the results of a series of cosmological N-body simulations of a vector dark energy (VDE) model, performed using a suitably modified version of the publicly available gadget-2 code. The set-ups of our simulations were calibrated pursui[...]![]()
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We explore the different possibilities for branons as dark matter candidates. We consider a general brane-world model, parametrized by the number of extra dimensions, N, the fundamental scale of gravity M-D, the brane tension scale f, and the br[...]![]()
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Ruiz Cembranos, José Alberto ; Gammaldi, Viviana ; López Maroto, Antonio | American Physical Society | 2014-08-07The spectral study of the HESS J1745-290 high-energy gamma-ray cutoff from the Galactic center is compatible with a signal of dark matter (DM) annihilation or decay. If this is the case, a neutrino flux from that source is also expected. We anal[...]![]()
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Ruiz Cembranos, José Alberto ; López Maroto, Antonio ; Villarrubia Rojo, Héctor | IOP Publishing | 2019-06-18One of the fundamental assumptions of the standard Lambda CDM cosmology is that, on large scales, all the matter-energy components of the Universe share a common rest frame. This seems natural for the visible sector, that has been in thermal con[...]![]()
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In this work we calculate the low-energy effective action for gravity with torsion, obtained after the integration of scalar and fermionic matter fields, using the local momentum representation based on the Riemann normal coordinates expansion. [...]![]()
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Dark energy is usually parametrized as a perfect fliud with negative pressure and a certain equation of state. Besides, it is supposed to interact very weakly with the rest of the components of the universe and, as a consequence, there is no rea[...]![]()
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López Maroto, Antonio ; Beltrán Jiménez, José | Progress Theoretical Physics Publication Office | 2011In this work we consider quantum electromagnetic fields in an expanding universe. We start by reviewing the difficulties found when trying to impose the Lorenz condition in a time dependent geometry. Motivated by this fact, we explore the possib[...]![]()
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We discuss the existence of de Sitter inflationary solutions for the string-inspired fourth-derivative gravity theories with dilaton field. We consider a space-time of arbitrary dimension D and an arbitrary parametrization of the target space me[...]![]()
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We analyze the claimed tension between redshift space distorsions measurements of f(z)sigma 8(z) and the predictions of standard Lambda CDM (Planck 2015 and 2018) cosmology. We consider a dataset consisting of 17 data points extending up to reds[...]![]()
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It is well known that an extremely accurate parametrization of the growth function of matter density perturbations in ACDM cosmology, with errors below 0.25%, is given by f(a) = ?^(?)_(m)(a) with ? ? 0.55. In this work, we show that a simple mo[...]![]()
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We consider the problem of parametrizing modified gravity theories that include an additional vector field in the sub-Hubble regime within the quasi-static approximation. We start from the most general set of second order equations for metric an[...]![]()
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We study the production of massive fermions in arbitrary vector and axial-vector classical backgrounds using effective action techniques. A perturbative calculation shows the different features of each field and in particular it is seen that pur[...]