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108 papers · 1 filter
Dark Energy-Dark Matter Interaction from the Abell Cluster A586
Orfeu Bertolami, Francisco Gil Pedro, Morgan Le Delliou
We find that deviation from the virial equilibrium of the Abell Cluster A586 yields evidence of the interaction between dark matter and dark energy. We argue that this interaction…
Nonlinear Stability of Riemann Ellipsoids with Symmetric Configurations
Miguel Rodriguez-Olmos, M. Esmeralda Sousa-Dias
We apply geometric techniques to obtain the necessary and sufficient conditions on the existence and nonlinear stability of self-gravitating Riemann ellipsoids having at least two…
Parametric Resonance and Cosmological Gravitational Waves
Paulo M. Sá, Alfredo B. Henriques
We investigate the production of gravitational waves due to quantum fluctuations of the vacuum during the transition from the inflationary to the radiation-dominated eras of the un…
Leptonic CP Violation and Leptogenesis
M. N. Rebelo
We review some recent results on the connection between CP violation at low energies and Leptogenesis in the framework of specific flavour structures for the fundamental leptonic m…
Computational Chemotaxis in Ants and Bacteria over Dynamic Environments
Vitorino Ramos, C. M. Fernandes, A. C. Rosa +1
Chemotaxis can be defined as an innate behavioural response by an organism to a directional stimulus, in which bacteria, and other single-cell or multicellular organisms direct the…
Universal behavior of baryons and mesons transverse momentum distributions in the framework of percolation of strings
L. Cunqueiro, J. Dias de Deus, E. G. Ferreiro +1
In the framework of percolation of strings, the transverse momentum distributions in AA and hh collisions at all centralities and energies follow a universal behavior. The width of…