1 citations · 1 across the 1 of their papers we have counts for
6 papers
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…
Quintessence with Coupled Scalar Fields
M. C. Bento, O. Bertolami, N. C. Santos
We discuss the dynamics of a quintessence model involving two coupled scalar fields. The model presents two types of solutions, namely solutions that correspond to eternal and tran…
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…
Maximally Symmetric Cosmological Solutions of Type II Superstrings
M. C. Bento
We study maximally symmetric cosmological solutions of type II supersymmetric strings in the presence of the exact, SL(2,Z)-invariant, higher-curvature corrections to the lowest or…
On a possible solution for the Polonyi problem in string cosmology
M. C. Bento, O. Bertolami
We establish the main features of homogeneous and isotropic dilaton, metric and Yang-Mills configurations in a cosmological framework. We identify a new energy exchange term betwee…