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Autor López Maroto, Antonio |
Documentos disponibles escritos por este autor (100)
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López Maroto, Antonio ; Ruiz Cembranos, José Alberto ; Gammaldi, Viviana | IOP publishing ltd | 2013-04We study the main spectral features of the gamma-ray fluxes observed by the High Energy Stereoscopic System (HESS) from the J1745-290 Galactic Center source during the years 2004, 2005 and 2006. In particular, we show that these data are well fi[...]![]()
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Using the Fujikawa and the heat-kernel methods we make a complete and detailed computation of the global, gauge, and gravitational anomalies in the standard model defined on a curved space-time with torsion. We find new contributions coming from[...]![]()
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We analyze the sensitivity of galaxy and weak-lensing surveys to detect preferred directions in the gravitational interaction. We consider general theories of gravity involving additional vector degrees of freedom with non-vanishing spatial comp[...]![]()
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Despite the success of Maxwell's electromagnetism in the description of the electromagnetic on small scales, we know very little about the behavior of electromagnetic fields on cosmological distances. Thus, it has been suggested recently that th[...]![]()
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We study, within the recently proposed brane-world scenario, the effective action for the low-energy brane excitations. These modes are understood as Goldstone bosons associated to the spontaneous isometry breaking, induced on the bulk space by [...]![]()
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We consider electromagnetic field quantization in an expanding universe We find that the covariant (Gupta Bleuler) method exhibits certain difficulties when trying to impose the quantum Lorenz condition on cosmological scales. We thus explore th[...]![]()
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We study the high-energy equivalence between helicity ±1/2 gravitinos and Goldstinos in order to calculate the production of gravitinos in time-dependent scalar and gravitational backgrounds. We derive this equivalence for equations of motion, p[...]![]()
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Finkel Morgenstern, Federico ; González López, Artemio ; López Maroto, Antonio ; Rodríguez González, Miguel Ángel | American Physical Society | 2000-10-17We show that the most general inflaton potential in Minkowski spacetime for which the differential equation for the Fourier modes of the matter fields reduces to Lame's equation is of the form V(phi)=lambda phi^4/4+Kphi^2/2+mu/(2 phi^2)+V_0. As [...]![]()
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Albareti, F. D. ; Ruiz Cembranos, José Alberto ; López Maroto, Antonio | American Physical Society | 2014We consider the vacuum energy of massive quantum fields in an expanding universe. We define a conserved renormalized energy-momentum tensor by means of a comoving cutoff regularization. Using exact solutions for de Sitter space-time, we show tha[...]![]()
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López Maroto, Antonio ; Beltrán Jiménez, José ; Yepes Alonso, Gustavo ; Carlesi, Edoardo ; Knebe, Alexander | Oxford University Press | 2011-12The detection of extremely massive clusters at z > 1 such as SPT-CL J0546-5345, SPT-CL J2106-5844 and XMMU J2235.3 2557 has been considered by some authors as a challenge to the standard ? cold dark matter cosmology. In fact, assuming Gaussian [...]