2009/05/05 by Francesco Costa, F. E. M. Costa, Edésio M. Barboza +2 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Physics #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.79.127302
published as Phys.Rev.D79:127302,2009 · 5 pages, 5 figures, LaTeX
arxiv created 2009/05/05 · openalex publication_date 2009/06/25 · arxiv updated 2010/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Unless some unknown symmetry in nature prevents or suppresses a nonminimal coupling in the dark sector, the dark energy field may interact with the pressureless component of dark matter. In this paper, we investigate some cosmological consequences of a general model of interacting dark matter-dark energy characterized by a dimensionless parameter ϵ. We derive a coupled scalar field version for this general class of scenarios and carry out a joint statistical analysis involving type Ia supernovae data (Legacy and Constitution sets), measurements of baryon acoustic oscillation peaks at z=0.20 (2dFGRS) and z=0.35 (SDSS), and measurements of the Hubble evolution H(z). For the specific case of vacuum decay (w=\ensuremath-1), we find that, although physically forbidden, a transfer of energy from dark matter to dark energy is favored by the data.