Varying Fundamental Constants from a String-inspired Brane World Model |
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Authors: | Cristiano Germani Carlos F Sopuerta |
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Institution: | (1) Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 2EG, Britain |
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Abstract: | We report results on the construction of cosmological braneworld models in the context of the Einstein-Gauss-Bonnet gravity,
which include the leading correction to the Einstein-Hilbert action suggested by superstring theory. We obtain and study the
equations governing the dynamics of the standard cosmological models. We find that they can be written in the same form as
in the case of the Randall-Sundrum model but with time-varying four-dimensional gravitational and cosmological constants.
Finally, we discuss the cosmological evolution predicted by these models and their compatibility with observational data.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | |
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