Gravity in the Einstein-Gauss-Bonnet Theory with the Randall-Sundrum Background

Details Gravity in the Einstein-Gauss-Bonnet Theory with the Randall-Sundrum Background Gravity in the Einstein-Gauss-Bonnet Theory with the Randall-Sundrum Background

2000-10-12

arxiv.org/abs/hep-th/0010093v2

Nucl.Phys. B602 (2001) 346-366; Erratum-ibid. B619 (2001) 763-764

Physics

High Energy Physics

High Energy Physics - Theory

Latex file of 28 pages (no figure)

Scientific paper

10.1016/S0550-3213(01)00532-6

We obtain the full 5D graviton propagator in the Randall-Sundrum model with the Gauss-Bonnet interaction. From the decomposition of the graviton propagator on the brane, we show that localization of gravity arises in the presence of the Gauss-Bonnet term. We also obtain the metric perturbation for observers on the brane with considering the brane bending and compute the amplitude of one massless graviton exchange. For the positive definite amplitude or no ghost states, the sign of the Gauss-Bonnet coefficient should be negative in our convention, which is compatible with string amplitude computations. In that case, the ghost-free condition is sufficient for obtaining the Newtonian gravity. For a vanishing Gauss-Bonnet coefficient, the brane bending allows us to reproduce the correct graviton polarizations for the effective 4D Einstein gravity.

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