Holography and Phenomenology

TL;DR

<3-5 sentence high-level summary>The paper investigates how warped AdS5 geometries with Planck and TeV boundary branes map, via AdS/CFT, to strongly coupled 4D CFTs with dynamical gravity, and how this holographic perspective clarifies RS1/RS2 phenomenology and cosmology. It develops a detailed dictionary for RS2 and RS1, showing that Planck-brane physics corresponds to a UV cutoff with induced 4D gravity, while TeV-brane physics encodes IR conformal breaking and emergent particle spectra, including KK gravitons and radion dynamics. The authors analyze gauge fields in the bulk, the propagation and mixing of KK gauge bosons, and the resulting collider- and precision-physics implications, alongside radion stabilization and high-energy cosmology, including inflation and reheating. By comparing RS to ADD, the work highlights how holography and conformal dynamics shape observable consequences and guide model-building in TeV-scale gravity scenarios.

Abstract

We examine various aspects of the conjectured duality between warped AdS$_5$ geometries with boundary branes and strongly coupled (broken) conformal field theories coupled to dynamical gravity. We also examine compactifications with 5-d gauge fields, in which case the holographic dual is a broken CFT weakly coupled to dynamical gauge fields in addition to gravity. The holographic picture is used to clarify a number of important phenomenological issues in these and related models, including the questions of black hole production, radius stabilization, early universe cosmology, and gauge coupling unification.