Article révisé par les pairs
| Résumé : | Motivated by the puzzles of the dark matter and dark energy, we address the question whether the gravitational interaction can be consistently modified to include a non-zero graviton mass. After discussing generic difficulties of such a scenario in the Lorentz-invariant framework we present a model with spontaneously broken Lorentz symmetry which is theoretically consistent and experimentally viable. In this model the Newtonian potential is unmodified at the linear level, so the mass of the graviton is weakly constrained and can be as large as (1014cm)-1. The model possesses cosmological solutions with extra contributions to the energy density which behave like the cosmological constant and the matter with the equation of state depending on the parameters of the model. The massive graviton can play the role of the dark matter, in which case the model is falsifiable by the gravitational wave experiments. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. |
