Stabilization of moduli in spacetime with nested warping and the UED

TL;DR

This paper addresses the challenge of stabilizing moduli in nested warped higher-dimensional models, providing mechanisms that also set the scale for Universal Extra Dimensions, thus advancing the phenomenological viability of these theories.

Contribution

It introduces specific stabilization mechanisms for moduli in nested warped models, including a dynamical approach to fix the Universal Extra Dimensions scale.

Findings

Successful stabilization of moduli in nested warped models

A dynamical mechanism for setting the UED scale

Potential to evade LHC graviton constraints

Abstract

The absence, so far, of any graviton signatures at the LHC imposes severe constraints on the Randall-Sundrum scenario. Although a generalization to higher dimensions with nested warpings has been shown to avoid these constraints, apart from incorporating several other phenomenologically interesting features, moduli stabilization in such models has been an open question. We demonstrate here how both the moduli involved can be stabilized, employing slightly different mechanisms for the two branches of the theory. This also offers a dynamical mechanism to generate and stabilize the scale for the Universal Extra Dimensions, another long-standing issue.