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arXiv · 1605.03087

Regarding the Radion in Randall-Sundrum Models with Brane Curvature

Barry M. Dillon·Damien P. George·Kristian L. McDonald
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Abstract

In Randall-Sundrum models, one typically expects the radion to be the lightest new "gravity" state, as it is dual to a composite pseudo-Goldstone boson associated with conformal symmetry breaking in the IR. Here, we investigate the effects of localized brane curvature on the properties of the radion in Goldberger-Wise stabilized Randall-Sundrum models. We point out that both the radion mass and coupling to brane matter are sensitive to the brane curvature. Radion/Higgs kinetic mixing, via an IR-localized non-minimal coupling to the Higgs, is also investigated, in relation to the ghost-like radion that can occur for $\mathcal{O}(10)$ values of the IR curvature (as required to significantly suppress the first Kaluza-Klein graviton mass). We also discuss a class of speculative IR localized terms involving the radion. Basic comments regarding the dual 4D theory are offered.

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Barry M. Dillon, Damien P. George, Kristian L. McDonald. 2016-05-10. Regarding the Radion in Randall-Sundrum Models with Brane Curvature. https://doi.org/10.1103/physrevd.94.064045

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