Speaker
Description
The structure of chiral anomalies in brane world models presents subtle but important features. While the divergence of a 5D current has long been known to localize to end-of-the-world branes and distribute evenly between them, this picture breaks down when branes are hidden by horizons or replaced by soft-wall geometries. We demonstrate that in models motivated by the AdS/CFT correspondence — including Randall-Sundrum constructions — the correct approach is to introduce Chern-Simons terms that flow the anomaly entirely onto the ultraviolet, or "cut-off," brane. This has interesting implications both for collider physics and for cosmology. We discuss the implications for holographic composite axion solutions to the strong CP problem, and for inflationary cosmology.