5 papers
Massive Graviton Dark Matter from a Gapped Continuum
Eugenio Megias, Miguel Prieto, Mariano Quiros
We consider the possibility of dark matter in a warped extra-dimensional theory in presence of a linear dilaton background, with a gapped continuum spectrum, in a brane-world cosmo…
Stable Black Strings from Warped Backgrounds
Sylvain Fichet, Eugenio Megias, Mariano Quiros +1
We show that spacetime curvature alone can classically stabilize black strings. Working within a consistent five-dimensional dilaton-gravity system with a flat brane, we find that…
Holographic Dark Matter
Sylvain Fichet, Eugenio Megias, Mariano Quiros
Cold dark matter may be a fluid (or plasma) residing in a strongly-interacting hidden sector, rather than a population of weakly-coupled particles. Such a scenario admits a hologra…
Complementary Probes of Warped Extra Dimension: Colliders, Gravitational Waves and Primordial Black Holes from Phase Transitions
Anish Ghoshal, Eugenio Megias, Germano Nardini +1
We study the formation of primordial black holes (PBHs) and stochastic gravitational waves background (SGWB) produced by the supercooled radion phase transition (PT) in warped extr…
Entanglement Entropy and Thermal Phase Transitions from Curvature Singularities
Sergio Barbosa, Sylvain Fichet, Eugenio Megias +1
We study holographic entanglement entropy and revisit thermodynamics and confinement in the dilaton-gravity system. Our analysis focuses on a solvable class of backgrounds that inc…