Publication: Crossing the phantom divide in brane cosmology with curvature corrections and brane-bulk energy transfer
Issued Date
2008-01-17
Resource Type
ISSN
03702693
Other identifier(s)
2-s2.0-37449024932
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Mahidol University
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SCOPUS
Bibliographic Citation
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. Vol.659, No.1-2 (2008), 45-53
Suggested Citation
Shao Feng Wu, Auttakit Chatrabhuti, Guo Hong Yang, Peng Ming Zhang Crossing the phantom divide in brane cosmology with curvature corrections and brane-bulk energy transfer. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. Vol.659, No.1-2 (2008), 45-53. doi:10.1016/j.physletb.2007.10.087 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/19897
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Title
Crossing the phantom divide in brane cosmology with curvature corrections and brane-bulk energy transfer
Abstract
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. © 2007 Elsevier B.V. All rights reserved.