Extra Dimensions and their Ultraviolet Completion

TL;DR

This paper discusses models with large extra dimensions addressing the hierarchy problem, focusing on their collider effects and possible ultraviolet completions like string theory and fixed-point gravity.

Contribution

It provides an introduction to TeV-scale gravity models, their collider phenomenology, and explores potential ultraviolet completions.

Findings

Large extra dimensions can address the hierarchy problem.

Ultraviolet completions include string theory and fixed-point gravity.

Collider effects of TeV-scale gravity are analyzed.

Abstract

Large extra dimensions are one of the constructions addressing the hierarchy problem of the Standard Model. Their main theoretical and phenomenological challenge is that already predicting LHC effects requires an ultraviolet completion of TeV-scale gravity. In these lecture notes we first give a basic introduction into TeV-scale gravity models and their collider effects and then discuss possible ultraviolet completions, like string theory and fixed-point gravity.