Gravity-Trapping Domain Walls From Resolved Branes

TL;DR

This paper demonstrates that certain resolved branes in string theory can produce gravity-trapping domain walls in five dimensions without the need for ad hoc sources, advancing the embedding of extra dimensions in M-theory.

Contribution

It shows that near-horizon geometries of resolved branes reduce to gravity-trapping domain walls without delta-function sources, improving string theory embeddings of extra dimensions.

Findings

Resolved branes produce gravity-trapping domain walls

No additional delta-function sources needed

Supports embedding in M-theory and models strongly-coupled gauge theories

Abstract

All previous Randall-Sundrum type models have required a Z_2 identification source which does not have a known string theoretic origin. We show that the near-horizon of various resolved branes on an Eguchi-Hanson instanton dimensionally reduce to a five-dimensional domain wall that traps gravity, without an additional delta-function source. This brings us substantially closer to embedding infinite extra dimensions in M-theory. Also, this provides us with a brane world model for a strongly-coupled Yang-Mills field theory with quark-antiquark charge screening at finite separation distance.