Warped Universal Extra Dimensions

TL;DR

This paper explores a 5D warped model with KK-parity symmetry, analyzing the mass spectrum and wavefunctions of KK modes, bridging Randall-Sundrum and Universal Extra Dimensions frameworks for phenomenological insights.

Contribution

It provides analytical formulas for KK mode masses and wavefunctions in a warped extra dimension model with KK-parity, enabling interpolation between different warping regimes.

Findings

Lightest KK particle is the first radion excitation.

Next-to-lightest KK particle is either the first top quark excitation or KK-parity odd Higgs.

Masses are around the electroweak scale.

Abstract

We consider a 5D warped scenario with a KK-parity symmetry, where the non-trivial warping arises from the dynamics that stabilizes the size of the extra dimension. Generically, the lightest Kaluza-Klein (KK) particle is the first excitation of the radion field, while the next-to-lightest Kaluza-Klein particle is either the first excitation of the (RH) top quark or the first KK-parity odd Higgs. All these masses are expected to be of order the electroweak scale. We present simple analytical expressions for the masses and wavefunctions of the lowest lying KK modes, and derive the Feynman rules necessary for phenomenological applications. The framework allows to interpolate between a strongly warped scenario a la Randall-Sundrum (RS), and a weakly warped scenario that shares properties of both RS and Universal Extra Dimensions models.