2007/08/31 by Shao-Feng Wu, Auttakit Chatrabhuti, Guo-Hong Yang +2 · 26 citations
Physics and Astronomy · #Astrophysics #Baryon acoustic oscillations #Black Holes and Theoretical Physics #Brane #Cosmology #Cosmology and Gravitation Theories #Curvature #Dark energy #Equation of state #Galaxies: Formation, Evolution, Phenomena #Geometry #Imaging phantom #Induced gravity #Particle physics #Physics #Quantum #Quantum gravity #Quantum mechanics #Shape of the universe #Supernova #Theoretical physics #Universe #astro-ph
paper · pdf · doi:10.1016/j.physletb.2007.10.087
published in Physics Letters B 659(1-2), 45-53 (Elsevier BV) · 11 pages,3 figures, revtex4, revised version, accepted for publication in Phys. Lett. B
arxiv created 2007/10/29 · openalex publication_date 2007/12/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the Randall-Sundrum brane-world model with bulk-brane energy transfer where the Einstein-Hilbert action is modified by curvature correction terms: a four-dimensional scalar curvature from induced gravity on the brane, and a five-dimensional Gauss-Bonnet curvature term. It is remarkable that these curvature terms will not change the dynamics of the brane universe at low energy. Parameterizing the energy transfer and taking the dark radiation term into account, we find that the phantom divide of the equation of state of effective dark energy could be crossed, without the need of any new dark energy components. Fitting the two most reliable and robust SNIa datasets, the 182 Gold dataset and the Supernova Legacy Survey (SNLS), our model indeed has a small tendency of phantom divide crossing for the Gold dataset, but not for the SNLS dataset. Furthermore, combining the recent detection of the SDSS baryon acoustic oscillations peak (BAO) with lower matter density parameter prior, we find that the SNLS dataset also mildly favors phantom divide crossing.