# Calculable mass hierarchies and a light dilaton from gravity duals

## TL;DR

This paper uses gravity duals to compute the mass spectrum of a strongly-coupled gauge theory, revealing a naturally light dilaton that could address hierarchy problems in particle physics.

## Contribution

It presents a novel calculation of scalar and tensor masses in a specific gravity dual model, demonstrating a parametrically light dilaton in a multi-scale system.

## Key findings

- Identification of a light dilaton in the mass spectrum
- Demonstration of calculable mass hierarchies in gauge/gravity duality
- Implications for hierarchy problems in electroweak theory

## Abstract

In the context of gauge/gravity dualities, we calculate the scalar and tensor mass spectrum of the boundary theory defined by a special 8-scalar sigma-model in five dimensions, the background solutions of which include the 1-parameter family dual to the baryonic branch of the Klebanov-Strassler field theory. This provides an example of a strongly-coupled, multi-scale system that yields a parametrically light mass for one of the composite scalar particles: the dilaton. We briefly discuss the implications of these findings towards identifying a satisfactory solution to both the big and little hierarchy problems of the electro-weak theory.