Probing the Geometry of Warped String Compactifications at the LHC

TL;DR

This paper investigates how smooth infrared cutoffs in warped string compactifications influence the properties of Kaluza-Klein gravitons, revealing significant differences from traditional Randall-Sundrum models and proposing a new phenomenological approach.

Contribution

It introduces a simple mass gap ansatz to study IR modifications in warped extra dimensions, highlighting their impact on KK graviton spectra and couplings.

Findings

KK graviton spectrum varies with IR warp factor shape

Deformed conifold models differ from RS in phenomenology

Mass gap ansatz aids in IR modification analysis

Abstract

Warped string compactifications, characterized by non-singular behavior of the metric in the infrared (IR), feature departures from the usual anti-de Sitter warped extra dimensions. We study the implications of the smooth IR cutoff for Randall-Sundrum (RS) type models. We find that the phenomenology of the KK gravitons (including their masses and couplings) depends sensitively on the precise shape of the warp factor in the IR. In particular, we analyze the warped deformed conifold and find that the spectrum differs significantly from that of RS, and present a simple prescription (a mass gap ansatz) which can be used to study the phenomenology of IR modifications to 5-d warped extra dimensions.