Gravity at the Tip of the Throat
Bruno Valeixo Bento, Dibya Chakraborty, Susha Parameswaran, Ivonne, Zavala

TL;DR
This paper investigates how warped throat geometries in string compactifications influence gravitational interactions and potential observable signatures, including modifications to Newtonian gravity and gravitational wave signals.
Contribution
It provides a detailed analysis of the Kaluza-Klein spectrum and gravitational signatures in warped throats, connecting string theory models to phenomenological constraints.
Findings
KK graviton masses depend on warping and bulk size
Modified Newtonian potential predictions are consistent with current constraints
Warping can produce gravitational wave signals within experimental detection ranges
Abstract
We study the gravitational signatures that arise from compactifying Type IIB supergravity on a compact space containing a Klebanov-Strassler warped throat. After reviewing the dimensional reduction of the 10d graviton and explicitly obtaining the equations of motion for the 4d tensor , vector and scalar modes, we find the masses and wavefunctions of the Kaluza-Klein tower of spin-2 states. We explore how the masses and wavefunctions depend on the balance between the strength of the warping and the size of the bulk, and how these relate to the range and strength of the interactions which correct the Newtonian gravitational potential. By computing the modified Newtonian potential for sources on a brane somewhere along the throat, and applying consistency constraints on the Klebanov-Strassler parameters, we obtain predictions for the phenomenological…
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