Aspects of Brane Physics in 5 and 6 Dimensions

TL;DR

This paper presents a method for analyzing perturbations in higher-dimensional brane world models, focusing on 6D compactifications, and compares these with 5D models and Kaluza-Klein theories.

Contribution

It introduces a general strategy for studying perturbations in 6D brane world models and compares the physical features with 5D models and traditional Kaluza-Klein frameworks.

Findings

Physical features of fluctuation spectra in 6D models identified

Comparison with 5D brane models highlights differences

Insights into background geometries induced by branes

Abstract

We outline a general strategy to deal with perturbations in brane world models. We illustrate the method by studying simple 6D brane world compactifications. We introduce the background geometries induced by the branes, and summarize the main physical features observed in the fluctuation spectra. We compare these results with 5D brane world models and the traditional Kaluza-Klein picture.