Abstract
We explore thick branes in f (R, ϕ, X) gravity. We obtain the linear tensor perturbation equation of f (R, ϕ, X) branes and show that the branes are stable against the tensor perturbations under the condition of \( \frac{\partial f\left(R,\phi, X\right)}{\partial R}>0 \). In order to obtain thick brane solutions of the fourth-order field equations in this theory, we employ the reconstruction technique. We get exact solutions of the specific f (R, ϕ, X) thick brane generated by a noncanonical scalar field. It is shown that the zero mode of the graviton for the thick brane is localized under certain conditions. This implies that the four-dimensional Newtonian potential is recovered on the brane. The effects of the Kaluza-Klein modes of the graviton for the f (R, ϕ, X) thick brane are also discussed.
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Cui, ZQ., Liu, YX., Gu, BM. et al. Linear stability of f(R, ϕ, X) thick branes: tensor perturbations. J. High Energ. Phys. 2018, 83 (2018). https://doi.org/10.1007/JHEP11(2018)083
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DOI: https://doi.org/10.1007/JHEP11(2018)083