13 citations · 29 across the 8 of their papers we have counts for
5 papers · 1 filter
Challenges to the Generalized Chaplygin Gas Cosmology
O. Bertolami
The generalized Chaplygin gas (GCG) model allows for an unified description of the cosmologically recent accelerated expansion of the Universe and of the evolution of energy densit…
Generalized Chaplygin gas as a scheme for Unification of Dark Energy and Dark Matter
M. C. Bento, O. Bertolami, A. A. Sen
We study the cosmological scenario arising from the dynamics of a generalized Chaplygin gas. The equation of state of the system is given in terms of the energy density, , and p…
Cosmological Bounds on an Invisibly Decaying Higgs Boson
O. Bertolami, M. C. Bento, R. Rosenfeld
We derive bounds on the Higgs boson coupling to a stable light scalar which is regarded as a collisional dark matter candidate. We study the behaviour of this scalar,…
Self-Interacting Scalar Dark Matter and Higgs Decay
M. C. Bento, O. Bertolami, R. Rosenfeld +1
Self-interacting dark matter has been suggested in order to overcome the difficulties of the Cold Dark Matter model on galactic scales. We argue that a scalar gauge singlet coupled…
Ultra-High Energy Cosmic Rays and Symmetries of Spacetime
O. Bertolami
High energy cosmic rays allow probing phenomena that are inacessible to accelerators. Observation of cosmic rays, presumebly protons, with energies beyond , th…