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Abstract: Quadratic curvature Gauss-Bonnet gravity may be the solution to the darkenergy problem, but a large coupling strength is required. This can lead toconflict with laboratory and planetary tests of Newton-s law, as well as lightbending. The corresponding constraints are derived. If applied directly tocosmological scales, the resulting bound on the density fraction is |Omega GB|< 3.6 x 10^-32.



Autor: Stephen C. Davis

Fuente: https://arxiv.org/







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